تاثیر شرایط مختلف رطوبتی و حرارتی بر اکسایش گوگرد و غلظت عناصر غذایی در خاک

منتجبی, نصرت اله; فیضیان, محمد; داودی, محمد حسین; سهرابی, اکبر; شریعت, سید مهدی

تاثیر شرایط مختلف رطوبتی و حرارتی بر اکسایش گوگرد و غلظت عناصر غذایی در خاک

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ عضو هیئت علمی سازمان تحقیقات و آموزش کشاورزی

² Assisstant professor of lorestan university

³ Assisstant professor of soil and water research Institute

⁴ Assisstant professor of payame noor university

چکیده

تحقیق به صورت فاکتوریل شامل دو سطح رطوبتی (60 % در صد (M1) و 90 در صد ظرفیت زراعی (M2)) و چهار سطح گوگرد (0S0=، 500 S1=، 1000 S2= و 2000 S3= کیلوگرم در هکتار) در سه تکرار بود. خاک ها درون ویال های پلاستیکی ریخته شدند. در آزمایش اول خاکها در دمای °C 25 خوابانده شدند و در 6 نوبت (30T1=، 60T2= ، 90T3=، 120T4=، 180T5= و 270T6= روز) از خاکها نمونه گیری شد ولی در آزمایش دوم دمای خواباندن °C 36 بود و در 3 نوبت (14T7=، 28T8= و 42T9= روز) نمونه برداری شد. صفات pH، EC، P، Fe، Mn و Zn اندازه گیری شد. به استثنای اثر اصلی گوگرد و اثر متقابل رطوبت و گوگرد بر فسفر قابل جذب و نیز اثر متقابل رطوبت و مدت خواباندن بر منگنز قابل جذب، اثرات اصلی و متقابل متغیرهای رطوبت، گوگرد و مدت خواباندن بر دیگر صفات تفاوت معنی دار داشت. افزایش رطوبت موجب افزایش EC، P، Fe، Zn و کاهش pH و Mn شد. مصرف گوگرد pH را کاهش و EC، Fe، Zn و Mn را افزایش داد. بیشترین میزان آهن، منگنز و روی قابل جذب با مصرف 1000 کیلوگرم در هکتار گوگرد حاصل شد. اثر مدت خواباندن بر تمام صفات معنی دار بود. دوره خواباندن 90 روز بالاترین فسفر و روی را داشت و بیشترین غلظت آهن و منگنز پس از 60 روز حاصل شد. اثر متقابل رطوبت و گوگرد به غیر از فسفر بر بقیه صفات معنی دار بود. اثر متقابل رطوبت و مدت خواباندن به غیر از منگنز بر بقیه صفات معنی دار بود. اثرات متقابل گوگرد و مدت خواباندن بر تمام صفات معنی دار بود.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of various temperature and moisture conditions on Sulfur oxidation and nutrient elements concentration in soil

نویسنده [English]

Nosratolah Montajabi ¹

⁴

چکیده [English]

Research purpose was investigation of moisture, temperature and incubation periods effect on Sulfur oxidation, pH change and nutrient elements availability. This research was conducted with two experiments in randomized complete blocks designe with 3 replications. In the first experiment, treatments were the factorial combination of 2 moisture levels [%60FC(M1) and %90FC(M2)], 4 Sulfur levels (S0=0, S1=500, S2=1000 and S3=2000kg/ha) and 6 incubation periods (T1=30, T2=60, T3=90, T4=120, T5=180 and T6=270 days) and Soils were incubated at 25°C. In the second experiment, Soils were incubated for 3 periods (T7=14, T8=28, T9=42 days) at 36°C. PH, EC, available P, Fe, zn and Mn were measured. Variance Analysis indicated that Sulfur and its interaction with moisture effects was not significant on available P. Also moisture and incubation period interaction was not significant on available Mn. Main effects and interactions of variables were significant on all measured characteristics with except for mentioned characteristics. Moisture increasing caused increasing of EC, P, Fe, Zn and decreasing of pH and Mn. Sulfur application decreased pH and increased EC, Fe, Zn and Mn. The most concentration of Fe, Mn and Zn accrued with 1000kg/ha sulfur application. Effect of incubation periods was significant on all attributes. Incubation period of 90 days (T3) had the most P and Zn. The most concentration of Fe and Mn gained after 60 days incubation. Moisture and sulfur interaction was significant on all measured characteristics with except for Phosphorus. Moisture and incubation period interaction had significant difference on all measured attributes with the exception of Manganese. Interaction of Sulfur and incubation period was significant on all measured attributes. The tri- combined treatments had significant difference on the measured characteristics with the exception of available P. The best recommendable treatment is M2S2T3.

کلیدواژه‌ها [English]

“P”
“pH”
“Sulfur oxidation”
“Fe”
“Zn”

مراجع

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