| 摘要: |
| 陕西省主要土壤类型和不同肥力水平土壤耕层含硫量测定结果表明,半干旱、半湿润地区的石灰性土壤和湿润地区非石灰性土壤的含硫量无稳定差异;两种类型土壤硫素状况的主要区别可能是有机硫和无机硫的相对比例,即无机硫在石灰性土壤中所占比例较高。低于多数作物有效硫临界值的土壤主要分布在陕南和陕北地区,关中地区所占比例较小。影响有效硫含量的主要因素是有机质、物理性粘粒和土壤全硫的含量。 |
| 关键词: 有效硫,石灰性土壤,无机硫,物理性粘粒,土壤有机质 |
| DOI： |
| 分类号: |
| 基金项目: |
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| THE CONTENTS AND DISTRIBUTION OF SULFUR IN SOILS IN SHAANXI PROVINCE |
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Wei Qinfeng Wang Yiquan Liu Tunliang Bi Shengguang Zhang riming
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| Abstract: |
| The results obtained from the determination of sulfur contents in different soil types and tilths with different fertilities show that there is no stable difference in sulfur contents in calcareous soil in the semiarid and semihumid areas and in non-calcareous soil, in the humid areas.The principal difference of sulfur elements in two types of soils is likely to be the relative proportion between organic sulfur and inorganic sulfur, i·e inorganic sulfur consists of higher percentage in calcareous soil. Soils with the critical values of available sulfur below most of crop requirements mainly spread in south nd north parts of Shaanxi province,but there is a small percentage of this kind of soil in Gnanzhong,but there is a small percentage of this kind of soil in Gnanzhcng, Shaanxi Province The major constraints affecting the contents of availabe sulfur are organic matter, physical c.'ay particles and total sulfur contents in sonls. |
| Key words: available suflur,calcareous soil,inorganic sulfur,physical clay particles,soil organic matter |
