The impact of land use on the relative abundance and composition of soil bacterial communities
قباد
جلالی
دانشگاه فردوسی مشهد
author
امیر
لکزیان
عضو هیات علمی گروه علوم خاک-دانشگاه فردوسی مشهد
author
علیرضا
آستارایی
عضو هیات علمی گروه علوم خاک- دانشگاه فردوسی مشهد
author
علیاکبر
حداد مشهد ریزه
عضو هیات علمی گروه زیستشناسی- دانشگاه فردوسی مشهد
author
مهدی
آزادوار
عضو هیات علمی گروه گیاهپزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی جنوب استان کرمان
author
عیسی
اسفندیارپور بروجنی
عضو هیات علمی گروه علوم خاک- دانشگاه ولیعصر (عج) رفسنجان
author
text
article
2019
per
Land-use change is one of the most important factors influencing soil microbial communities, which play a pivotal role in most biogeochemical and ecological processes. In order to determine the effect of land use on the relative abundance and composition of soil bacterial communities by using Real-time PCR, a study was carried out in three different land uses (orchard land, farmland and shrubland) in Jiroft plain, Iran. 12 surface soil samples were collected from each land use and some soil physicochemical properties were measured. The NucleoSpin® Soil kit was used for extraction and purification of DNA from soil samples. Quantitative comparison of the concentration and melting temperature of 16S rDNA amplicons, respectively, for assessment of the relative abundance and composition of soil bacterial communities in different land uses were performed by using Real-time PCR system and based on the relative standard curve method. The results related to the concentration and quality of soil DNA indicated that extraction of DNA from soil samples by using NucleoSpin® Soil kit was favorable. As the results of Kruskal-Wallis nonparametric ANOVA showed, land use had significant effect on the relative abundance and composition of soil bacterial communities at the level of 5%. Means comparison showed that the relative abundance of soil bacterial communities in orchard land use was higher than that of two other land uses. Furthermore, the composition of soil bacterial communities in orchard and farm land uses was significantly different from shrub one. It can be concluded that land-use changes in Jiroft plain from shrubland to orchard land, and from shrubland to orchard land and farmland have caused an increase in the relative abundance as well as a significant change in the composition of soil bacterial communities, respectively.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
1
15
https://asr.urmia.ac.ir/article_120681_c32d74a8713efa4ebe7f499d502a08e2.pdf
Short-term effects of conservation tillage and canola cover crop on selected biological indicators of soil quality and sunflower yield in Dastjerd, Hamedan
Shilan
Felegary
former MSc student of Soil Science, Faculty of Agriculture, Bu-Ali Sina University.
author
محسن
نائل
گروه خاکشناسی، دانشکده کشاورزی، دانشگاه بو علی سینا همدان
author
Javad
Hamzei
Agronomy and Plant Breeding Dept., Faculty of Agriculture, Bu-Ali Sina University.
author
Ali Akbar
Safari Sinegani
Soil Science Dept., Faculty of Agriculture, Bu-Ali Sina University.
author
text
article
2019
per
Assessing biological indicators of soil quality is crucial to evaluation of ecological sustainability of agroecosystem. This study aimed at assessing the effects of four years of different tillage practices (no tillage, minimum tillage and conventional tillage) with and without canola cover crop on selected biological indicators of soil quality and sunflower yield in Dastjerd, Hamedan; A randomized complete block design with factorial arrangement and three replications was conducted. All the measured properties, including soil organic carbon, available P, basal microbial respiration, protease and phosphatase activity and sunflower seed yield were significantly (P
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
16
30
https://asr.urmia.ac.ir/article_120669_2ca2cf39cd5b15ac446a7486d5b6ce00.pdf
Estimation of Soil erodibility factor of USLE model and its relationship with landscape features in some parts of Nazzlo-Chay basin, Iran
Kamal
Khosraviaqdam
فارغ التحصیل کارشناسی ارشد گروه علوم خاک دانشگاه ارومیه
author
Hamid Reza
Momtaz
Associate Professor, Department of Soil Science, Faculty of Agriculture, Urmia University
author
Farrokh
Asadzadeh
Associate Professor, Department of Soil Science, Faculty of Agriculture, Urmia University
author
text
article
2019
per
Soil erodibility is a dynamic aspect that varies over time and with plough, animal’s activities and biochemical factors resulting in a major environmental threat to the sustainability and productive capacity of agricultural areas. In Universal Soil Loss Equation (USLE), soil erodibility factor (K-factor), as an effective parameter in water erosion is a function of particle size distribution, organic matter, structure and permeability. In the present study, the spatial distribution of the amount of K-factor was investigated in the Nazlou Chai Watershed in Urmia, West Azerbaijan using geostatistics. Then soil samples were taken from 1 km by 1 km square grid over 64 location, and the amount of K-factor was calculated in the USLE model. The results showed that K-factor was ranged from 0.029 to 0.079 (T h MJ-1 mm -1). The spatial variation of K-factor was best fit to the exponential model and showed a moderate spatial structure. The studied soils were categorized in low and very low erodibility classes. The quantitative amounts of erodibility were categorized based on slope classes and the highest value observed for 5-8% slope that belongs to dry farming land use. Also K-factor showed various values in different hydrological groups, where group A showed the least and group D showed the highest amount. It seems that inappropriate soil management in both hilly areas and dry farming lands is one of the main causes of soil damage and an increase of soil erodibility.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
31
43
https://asr.urmia.ac.ir/article_120677_529bc46151523c947f64b15d8a802be4.pdf
Reaction of topsoil earthworms groups to variability of ecological characters in a broad-leaved forest
Faeze Sadat
Tarighat
Forestry, Guilan University
author
Yahya
Kooch
Tarbiat Modares University
author
سید محسن
حسینی
دانشگاه تربیت مدرس
author
text
article
2019
per
AbstractEarthworms are as the most important soil forest ecosystem engineers. Present research was considered to study the reaction of earthworm group's (epigeic, anecic and endogeic) in topsoil to variability of ecological characters (litter C, litter N, litter C/N, soil C, soil N, soil C/N, and pH and moisture) in Noor Forest Park. Litter and soil samples were taken, with microplots of 30×30×15 cm, under tree canopy of Alnus glotinusa, Ulmus glabra, Popolus caspica and Parrotia persica species. Earthworms were collected during soil sampling, washed in water and weighed. Biomass was defined as the weight of the worms after drying at the labratory. Results showed that the soil under Alnus glotinusa has high abundance and biomass of epigeic (0.3 n/m2 amd 3 g/m2 respectively) and endogeic (1.4 n/m2 and 14 mg/m2 respectively). Whereas any epigeic and endogeic were not found under Parrotia persica. The least density and biomass (0.5 n/m2 and 0.5 mg/m2 respectively) of anecic earhworms were recorded under Parrotia persica. The results of this research are indicating of positive role of Alnus glotinusa species, related to high litter N, on biological index of soil quality that can be considered to restore of degraded parts in the northern Iran.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
44
53
https://asr.urmia.ac.ir/article_120674_88bf97982db066b9aeac1188d767c65b.pdf
Testing of new inputs to predict near-saturated soil hydraulic conductivity
Peyman
Shaker Shahmarbeigloo
Graduate MSc Student, Soil Science Department, Urmia University
author
حبیب
خداوردیلو
دانشگاه ارومیه
author
Hamidreza
Momtaz
Assistant Professor, Department of Soil Science, Urmia University
author
text
article
2019
per
Near-saturated soil hydraulic conductivity (Ks) is a key property for several purposes including simulation of hydrological processes, determination of unsaturated soil hydraulic conductivity function and modelling water flow and solute transport. Since it is soil structure-dependent, field measurement techniques should be used to minimize disturbance of the sampled soil volume. Because of high spatiotemporal variability of Ks, replicated measurements need to be carried out, so that, the method to be applied should be simple and rapid enough as the simplified falling head (SFH) technique is. Alternatively, pedotransfer functions (PTFs) could also be utilized for indirect prediction of Ks through the surrounding soil attributes. The objective of this study was to test some new inputs to predict the Ks of salt-affected soils adjacent to Lake Urmia. A 32 cm diameter ring was used to determine Ks by the SFH technique in soils with different salinity (electrical conductivity of saturated extract, ECe = 0.1 – 95.3 dS/m) and sodicity (exchangeable sodium percentage, ESP = 4 – 70.9 %) levels. A total of 190 SFH runs were carried out, adjacent to each of which, some undisturbed soil cores (5 cm in height by 5 cm in diameter) and disturbed soil samples were randomly collected from the surface soil and were analyzed for their physicochemical properties. The studied soils mainly had moderate (≈ 40%) to moderately rapid (≈ 48%) conductivities. Correlation and stepwise regression analysis showed that Ks was correlated negatively with bulk density (ρb) (r = -0.205), index of crusting (Ic) (r = -0.180), and degree of compaction (SDC) (r = -0.206) (P ≤ 0.01) and positively with structural stability index (SSI) (r = 0.184) and geometric mean diameter of soil aggregates (GMD) (r = 0.157) (P ≤ 0.05). Furthermore, the Ks had negative correlation with both soil ECe and ESP.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
54
69
https://asr.urmia.ac.ir/article_20501_a5a479e37f37295060bdd380764cf359.pdf
The Effect of the urban waste water Tabriz Bonab and Maragheh on soil properties and the quality of three onions, tomatoes and alfalfa
احمد
بایبوردی
موسسه تحقیقات خاک و آب
author
hamed
rezaei
Soil & Water Research Institute. Imam Khomeini Blvd., Meshkin Dasht Road, Standard Square, Karaj, I.R.Iran
author
hasan
monirifar
بخش تحقیقات زراعی وباغی ،مرکز تحقیقات وآموزش کشاورزی ومنابع طبیعی آذربایجان شرقی، سازمان تحقیقات ،آموزش وترویج کشاورزی تبریز ایران
author
nasrin
hajihasani
بخش تحقیقات آبخیزداری ، مرکز تحقیقات وآموزش کشاورزی ومنابع طبیعی آذربایجان شرقی، سازمان تحقیقات ،آموزش وترویج کشاورزی تبریز ایران
author
parisa
zargaripour
بخش تحقیقات فنی ومهندسی کشاورزی، مرکز تحقیقات وآموزش کشاورزی ومنابع طبیعی آذربایجان شرقی، سازمان تحقیقات ،آموزش وترویج کشاورزی تبریز ایران
author
sedghali
zamani
بخش تحقیقات خاک وآب، مرکز تحقیقات وآموزش کشاورزی ومنابع طبیعی آذربایجان شرقی، سازمان تحقیقات ،آموزش وترویج کشاورزی تبریز ایران
author
rasoul
ahmadiadli
بخش تحقیقات خاک وآب، مرکز تحقیقات وآموزش کشاورزی ومنابع طبیعی آذربایجان شرقی، سازمان تحقیقات ،آموزش وترویج کشاورزی تبریز ایران
author
text
article
2019
per
In order to determine the elements and heavy metals in water and areas in various plants, the experiment was conducted during the years of 2014 and 2015 in form of factorial based on randomized complete block design. The first factor was included two levels of water (pit water and sewage water) and the second factor was involved three regions (Tabriz, Maragheh, and Bonab) and the third factor was included three crops (onions, tomatoes and alfalfa). 36 treatments were studied over two years in three replications. The results showed that there are significant differences among studied waters in terms of element amount. But the interaction of year and no significant difference waters but no significant difference was observed between interaction of year and waters. The results among the studied plants in terms of element amount demonstrated that there are significant differences among plants in terms of elements amount and also significant differences were observed for interaction of year and plant in majority of the studied traits. By studying the three regions in terms of elements amount; it was observed that there are significant differences among the regions. Significant difference was observed in majority of the studied traits for interaction of year and region. The results of mean comparisons with Duncan method indicated that sewage water had the highest amount of elements and onion had the greatest amount of elements and Bonab was the most polluted region. The correlation results showed that there was significant negative correlation between yield and heavy metals.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
70
83
https://asr.urmia.ac.ir/article_120676_997f9dd39f74d0f045a5b3cf71963aa9.pdf
Investigating the effects of antecedent rainfall on splash erosion in a Marl soil using rainfall simulator
Ali Reza
Vaezi
Associate Professor of Soil Science, Soil Science Department, Faculty of Agriculture, University of Zanjan
author
Shokouh
Karimi
Former M.Sc. Student of Soil Science, Soil Science Department, Faculty of Agriculture, University of Zanjan
author
Majid
Foroumadi
Ph.D. Student of Soil Science, Faculty of Agriculture, University of Zanjan
author
text
article
2019
per
Splash erosion is one of the most important kinds of water erosion. Splash of soil particles may affected by some factors especially antecedent rainfall event. Up to now, there isn’t any study on the effects of antecedent rainfall on splash erosion in the next rainfall. This study was conducted to investigate effect of the antecedent rainfall on the particles splash in a marl soil. Toward this, aggregates with a diameter of 6-8mm were taken of a marl soils under fallow condition in 2016. Aggregate were packed in 24 boxes with 30cm× 40cm dimensions and 30cm depth to investigate effect of eight rainfall durations levels at three replications. Simulated rainfall was applied to soil samples with eight durations (0, 7, 14, 21, 28, 35, 42 and 49 min). Aggregate breakdown and soil water content were determined in the soil samples after one day. After one day, soil boxes were placed under the same rainfall with a constant intensity of 40 mm h-1 for 15 min. Based on results, duration of antecedent rainfall significantly affected on the aggregate breakdown and increasing soil water content. The longest rainfall duration (49 min) appeared the highest aggregate breakdown (21.72%) as well as soil moisture content (29.08%).The amount of splash erosion in the next rain event were significantly influenced by the two soil variables changed by the antecedent rainfall i.e. aggregate breakdown (P
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
83
94
https://asr.urmia.ac.ir/article_120680_2dfa1e8b7a8521a6fea62cafdb50b533.pdf
Effect of Acetic Acid on Field Remediation Efficiency of Lead (Pb) contaminated soil with Electrokinetic Technology
Moslem
Servati
عضو هیئت علمی
author
Hossein
Beyrami
Assistant prof., National Salinity Research Center, Agricultural Research, Education and Extension Organization, Yazd
author
text
article
2019
per
Electrokinetic soil remediation is one of the innovative methods for decontamination of heavy metals from polluted soils. However, employing that method at field condition in soils with great adsorption capacity for heavy metals, needs to be studied thoroughly. In this research a Loam soil spiked with Lead (Pb) used to investigate electrokinetic remediation at field-scale in three depths (0, 15 and 30 cm) at experimental plots. After contamination with lead nitrate solution (1 g l-1), the soil had large amount of Pb (109.5, 102.1 and 87.3 mg kg−1 in three depths 0, 15 and 30 cm, respectively). All experiments were imposed with a constant voltage gradient of 1 V/cm in 10 days period in saturation condition at a field in Tabriz area, North West of Iran. In this study effect of different electrolytes (distilled water, Acetic acid 0.005 M) on the Pb removal efficiency by electrokinetic remediation were studied. The results suggested that removal efficiencies for Pb were influenced by type of electrolyte solution. After applying electrical current for 10 days, mean metal removal efficiency of Pb in distilled water treatment for three depths (0, 15 and 30) were 18.15%, 18.05% and 20.85% respectively. The mean Pb removal from the soil in acetic acid treatment in three mentioned depths were 22.0, 21.55 and 24.05 %, respectively, which represented 3.85, 3.5 and 3.2 % increasing in removal efficiency compared to the distilled water. High lime content (20.1%) of the examined soil appears hindered the increasing in removal efficiency with acetic acid solution. In addition, the pH changes along the soil plots showed an increasing trend from the anode to the cathode. In acetic acid treatment a greater reduction of pH was observed in the anode side.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
95
107
https://asr.urmia.ac.ir/article_120668_b9896e786531263350eed83da9e8e03f.pdf
Prediction of soil salinity using multivariable regression on the basis of extracted indices from Landsat 8 satellite (Case study: Urmia)
رعنا
خالقی
دانشگاه ارومیه
author
جواد
بهمنش
مدل سازی شبکه های عصبی، آبیاری و سازه های آبی
author
Nasrin
Azad
Urmia University
author
text
article
2019
per
Managing and monitoring of salinity is one of the most important affair in agriculture, especially in arid and semi-arid area. For this purpose we have to use new technology like remote sensing and GIS. The relationship between soil parameters with satellite data is an effective step for predicting soil salinity. In this study we use multivariable regression based on relationship between topographical properties and extracted indices from Landsat 8 satellite for predicting soil salinity in Urmia. For predicting soil salinity, samples of 40 points from 0-30 cm soil depth were taken. Electrical conductivity from soil saturation extract (ECe) was measured. After performing the necessary processing on satellite images, pixel values in the different bands were extracted. The data was divided into two series: Training data (80%), validation data (20%). The relationship between satellite data and results of multivariable linear regression methods predicted, accuracy of the model by using factors such as R- squared, standard error of the mean, adjusted R-squared and Durbin Watson statistic evaluated. Results showed that model predicted with correlation coefficient, standard error of the mean, adjusted R-squared and Durbin Watson statistic were 70.3, 10.03, 61.8 and 1.709 respectively. Finally, the model evaluated by statistical indices. The indices values of Geometric Mean Error Ratio (GMER), R- squared (R2) and Root Mean Square Error (RMSE) measured 0.867, 0.638 and 0.354 respectively. The results showed that the model has a better estimation of soil salinity.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
108
121
https://asr.urmia.ac.ir/article_120671_d41d8cd98f00b204e9800998ecf8427e.pdf
The effect of Arbuscular Mycorrhizal Fungi on morphological and physiological characteristics of maize (Zea mays L.) in different levels of phosphate fertilizer
Sajjad
Rahimi Moghaddam
دانش آموخته دکتری آگرواکولوژی دانشگاه شهید بهشتی
author
فرهاد
نوری نجفی
دانشجوی دکتری آگرواکولوژی دانشگاه شهید بهشتی
author
حامد
عینی نرگسه
دانشجوی دکتری زراعت دانشگاه تربیت مدرس
author
text
article
2019
per
To study the effect of arbuscular mycorrhizal fungi on morphological and physiological characteristics of maize in different levels of phosphorus fertilizer, a greenhouse experiment as factorial arranged in completely randomized design with three replications was carried out at Islamic Azad University Miyaneh Branch, Iran. The experimental treatments consisted of mycorrhizal inoculation with Glomus mosseae (inoculation and non-inoculation) and four levels of phosphorus chemical fertilizer (control, 13, 26, and 39 kg P per ha). Results showed that the highest values of wet and dry biomass (224.08 and 172.47 g Plant-1, respectively) were belonged to mycorrhizal inoculation in 39 kg P per ha. Also, the lowest values of wet and dry biomass (120.74 and 95 g Plant-1, respectively) were belonged to mycorrhizal non-inoculation at control level of phosphorus fertilizer. The highest values length, weight and number of ears (23.22 cm, 116.32 g and 4.25, respectively) were related to mycorrhizal inoculation in 39 kg P per ha. Totally, the result indicated which 39 kg P per ha at mycorrhizal non-inoculation had not only higher wet and dry biomass than 26 kg P per ha at mycorrhizal inoculation but also it had lower wet and dry biomass than 26 kg P per ha at mycorrhizal inoculation. Generally, the results of this research shows the increasing amount of biomass, chlorophyll and leaf phosphor concentration with improving in morphological and physiological characteristics of maize due to use of arbuscular mycorrhizal fungi. Also, absorption of phosphor and plant yield were increased by applying a low amount of phosphor fertilizer.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
122
131
https://asr.urmia.ac.ir/article_120670_14be33d109123e6b87ec7ee190ead15e.pdf
Micromorphological study of the gypsum and calcium carbonate features and clay mineralogy in soils with different parent material in south of Guilan province
mastaneh
rahimi mashkaleh
- Ph.D Student, Soil Science Department, Faculty of Agriculture University of Zanjan.
author
hasan
ramezanpour
Department of Soil engineering Science, Faculty of Agricultural Sciences, University of Guilan.
author
Nafiseh
Yaghmaeian Mahabadi
Department of Soil Science, Faculty of Agricultural Science, University of Guilan
author
mehdi
norouzi
Former Ph.D student, Soil Science Department, Faculty of Agriculture University of Tabriz.
author
text
article
2019
per
Gypsiferous and calcareous soils comprise an important part of soil resources in arid and semiarid areas of south of Guilan province. This study in order to investigation of gypsum and lime in soils of the hilly lands of Aliabad region in Guilan province by soil thin sections was performed. Soil sampling as air-dried undisturbed clods from gypsiferous-salty and calcareous parent material with three replicate at two slope positions (back slope and foot slope) and into surface (0-20 cm) and subsurface (20-40 cm) depths was performed. Results showed that soils with gypsiferous-salty parent material had heavier textural class than the calcareous soils. The results of micromorphology showed that the number of channel and chamber voids and excrements is higher in calcareous soil due to the presence of larger pores and more biological activity. Micromorphological pedofeatures of gypsiferous-salty soils include the forms of gypsum interlocked plates, gypsum lenticular crystals, gypsum pendant, infilling of gypsum as dense complete and incomplete, and loose discontinuous in voids and channel walls and hypo-coating of iron and manganese and in calcareous soils include excrements, halow iron and micritic nodules, rock fragments, gypsum and calcite pendant and different forms of pedogenic calcite as columnar, cluster, needle, micritic and sparitic. The fine fraction in both soils were mainly crystalitic b-fabric and locally stipple speckeld and undifferentiated b-fabric. The micromorphological index for soil evolution index (MISECA) showed that both soils had weak development. Results of clay mineralogy showed that chlorite, illite, vermiculite, smectite and hydroxyl-interlayer minerals were prominent in in both soils. Furthermore, the difference between soils of two parent material was the presence of palygorskite mineral in gypsiferous-salty soil.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
132
147
https://asr.urmia.ac.ir/article_120675_d0072ee8ed6266c1d577291efa357c02.pdf
Effects of salinity and microbial inoculation on the yield and phosphorous efficiency indicators of corn
mohsen
barin
استادیار
author
Mir Hassan
Rasouli Sadaghiani
Prof., of Soil Science, Dept. of Soil Science, Urmia University
author
Sanaz
Ashrafi Saeidlou
PH.D. Student, Dept. of Soil Science, Urmia University
author
Fatemeh
Shakouri
MSc. Student, Dept. of Soil Science, Urmia University
author
text
article
2019
per
In this study, in order to assess the effect of salinity on yield, phosphorous efficiency indicators and some elements concentration in corn root and shoot dry weight, and also to evaluate phosphate-solubilizing microorganisms and mycorrhizal fungi efficiency in adjusting salinity impacts on plant, an experiment carried out in a completely randomized design in greenhouse conditions. The first factor involves salinity (non-saline (NS) and salinity of 4.5 dS m-1 (S)) and the second factor was microbial inoculation including control (without inoculation), nutrition with soluble phosphorus (P), mycorrhizal inoculation (M), inoculation of phosphate solubilizing bacteria (PSB), phosphate solubilizing fungi inoculation (PSF), co-inoculation of mycorrhiza and bacteria (MB) and co-inoculation of mycorrhiza and fungi (MF). At the end of growing period, some plant growth indicators and nutrient concentrations in plant shoot were measured and phosphorous efficiency indicators were calculated. The results showed that salinity levels had a significant impact on all of measured properties except zinc. The highest amounts of shoot length (78.89 cm) and stem diameter (1.023 cm) were observed in soluble phosphorus treatment. Also, the results showed a significant increase in the amount of phosphorous, iron, zinc, copper, manganese, shoot length and stem diameter of plants that were inoculated with mycorrhiza and bacteria and in co-inoculation of AMF and phosphate-solubilizing microorganisms condition, in comparison with non-inoculated plants. Bacteria and mycorrhizal treatments increased shoot length amount 1.90 and 1.20 times compared to control, respectively. Fungi and mycorrhiza treatments increased shoot zinc content 40.98 and 85.65 percent compared to control, respectively. It is inferred that microbial inoculation increase corn plants resistance in salinity condition by influencing nutrients uptake.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
148
165
https://asr.urmia.ac.ir/article_120672_0010ddad8cb36bb9085e48c074006595.pdf
The use of plant growth promotion bacteria inoculants Pseudomonas fluorescens in increasing growth and nutrient uptake in wheat
شایان
شریعتی
دانشجوی دکتری دانشگاه تهران
author
حسینعلی
علیخانی
استاد گروه علوم و مهندسی خاک دانشگاه تهران
author
شهاب
شریعتی
استاد گروه شیمی دانشگاه آزاد رشت
author
text
article
2019
per
High cost of fertilizers manufacture and environmental pollution due to their application make it necessary to use other sources especially biofertilizers. The purpose of this study was to determine capability of bacteria Pseudomonas fluorescence survival as one of phosphate solubilizing and plant growth promoting bacteria on different organic and inorganic carriers including vermicompost, perlite, rock phosphate, and four formulations of them and also, their effect on growth indices in wheat. The experiment was performed through complete randomized block design with four replicates, seven inoculants and two fertilizers (simple and triple superphosphate) treatments. Based on the results although triple super phosphate treatment was the best regarding to chlorophyll, plant height, phosphorus content in the shoot, and shoot and root dry weight attributes but did not show significant difference with inoculants containing vermicompost (P>0.05). About the Iron and zinc in the shoot, vermicompost inoculant was observed higher than other treatments, and about zinc in the shoot this difference was significant with fertilizer and control (p
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
165
176
https://asr.urmia.ac.ir/article_120678_eb3550b3c7c204d3562f706050944eaa.pdf
Estimation of soil loss due to potato harvesting in Ghorveh-Dehgolan plain, Kurdestan Province
Kazem
Nosrati
university of shahid beheshti
author
milad
ostami
university of shahid beheshti
author
Mostafa
Amini
Uunversity of shahid beheshti
author
text
article
2019
per
Soil erosion is one of the hazards with on-site and off-site effects that gradually cause decreasing soil quality, land degradation, surface water contaminations, reduction of dam’s reservoirs capacity and threating of human food security. The soil loss due to crop harvesting (SLCH) has been considered less comparing the soil erosion types by researches. The objective of this study is therefore to estimate the Potato soil loss due to crop harvesting in the Ghorveh-Dehgolan plain, Kurdestan province. In view of this, 20 samples of potato with weight of 5 kg were collected from dry land and irrigated cultivated lands in the study area. In the laboratory, after washing the samples, the suspensions were filtrated and the remained soils on filter paper were dried and the SLCH determined. The results showed that the SLCH ranged 13.4 to 40.4 g kg-1. The results of one-way ANOVA showed that there is significance difference between SLCH from dry land farming and irrigating cultivation with the confidence level of 95%. The results of cluster analysis also indicated the weak relationships between samples collected from both land use types. The soil loss due to potato harvesting from 80490.4 ha in ten last years was 72374.52 Mg with annual average of 7237 Mg yr-1. Also, the mean soil erosion due to potato harvesting ranged from 0.66 to 1.14 Mg ha-1 harvest-1. The results of this study demonstrated that the soil losses caused by crop harvesting can be of the same order of magnitude as soil losses caused by water erosion processes that should be considered by researchers and planners in soil erosion control and conservation fields.
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
177
186
https://asr.urmia.ac.ir/article_120679_9f2222975cf242b163af3f92c7f1df4c.pdf
Different forms of soil potassium and its correlation with qualitative and quantitative characteristics of tobacco in soils of tobacco cultivated areas in northern Iran
عبدالغفور
قلی زاده
دانشجوی دکتری دانشگاه فردوسی مشهد
author
علیرضا
کریمی
گروه علوم خاک، دانشگاه فردوسی مشهد
author
رضا
خراسانی
گروه علوم خاک دانشگاه فردوسی مشهد
author
فرهاد
خرمالی
'v,i ug,l oh; دانشگاه علوم کشاورزی و منابع طبیعی گرگان
author
text
article
2019
per
Potassium content in tobacco leaves is highly affected the quality of tobacco and considered the important indicator for determining the tobacco leaf quality. This study aimed to investigate the relationship between different soil K forms (soluble, exchangeable, non-exchangeable, mineral and extracted with aqua-regia extractable) with quantitative and qualitative characteristics of tobacco. Nineteen surface soil samples were collected from tobacco cultivated areas of Golestan, Mazandaran and Guilan provinces. Physical, chemical properties and different forms of potassium in the soils were measured. A pot experiment in a completely randomized with three replications for the soils without application of potassium fertilizer was design to study the potassium uptake by tobacco. The results showed the lowest amounts all potassium forms in Guilan soils (except exchangeable potassium) and the highest amounts in Mazandaran soils. The effect of soil type on all the morphological and chemical characteristics of tobacco was significant at p
Applied Soil Research
Urmia University
2423-7116
7
v.
1
no.
2019
187
202
https://asr.urmia.ac.ir/article_120673_c129a569abb78c9bf339fef789fbb745.pdf