| Research on effect of sulfur application on saline-alkaline soil pH and availability of trace elements in Huanghe River irrigation district in Ningxia |
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| DOI：10.7606/j.issn.1000-7601.2010.03.36 |
| Key Words: saline- alkaline soil sulfur improvement trace element pH |
| Author Name | Affiliation | | CAO Yingfei | College of Resources and Environment, Norhwest A & F University, Yangling, Shaanxi 712100, China | | ZHAO Yi | College of Resources and Environment, Norhwest A & F University, Yangling, Shaanxi 712100, China | | ZHAO Wentian | College of Resources and Environment, Norhwest A & F University, Yangling, Shaanxi 712100, China | | LU Jialong | College of Resources and Environment, Norhwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A field test method was carried out with single application of N, P and K fertilizer and gypsum as the comparison, in which different amount of sulfur was applied, and by measuring pH and available microelements to study the effects of sulfur on the improvement in saline-alkaline soil. The results indicate that application of 2000 kg/hm2 gyp-sum and three levels of sulfur treatment, which is S1(sulfur 1 000 kg/hm2) , S2(sulfur 2 000 kg/hm2)and S3(sulfur 3000 kg/hm2),could all effectively lower pH; Among them, the effect of 1 000 kg/hm2 sulfur application(S1) is the best. Nitrogen and phosphorus with sulfur and gypsum application on the effectiveness of four kinds of trace elements have a certain impact. But, in addition to individual treatment on the effective state of iron and zinc could reach a signif-icant level of influence, other treatment efects are not very obvious. Therefore , single application of fertilizer, chemical fertilizer application together with sulfur, as well as chemical ferilizer application together with gypsum can improve with-in a certain range the alkaline soil and reduce soil pH. |
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