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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (3): 196-201.

所属专题： 农业气象

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

宁夏中部干旱带几类土壤可蚀性对比研究

左忠1,2,王峰1,张亚红2,郭永忠1,王顺霞3   

  • 收稿日期:2009-09-01 修回日期:2009-10-17 出版日期:2010-02-05 发布日期:2010-02-05

Studies & Compares on different Field uses Types of Soil Erodibility in Ningxia Middle Arid Area

  • Received:2009-09-01 Revised:2009-10-17 Online:2010-02-05 Published:2010-02-05

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714

摘要：

摘要：以旱作免耕农田、传统翻耕农田、冬小麦地、退耕草地（苜蓿地）和柠条林地为供试对象，对比分析了不同土地利用类型地表粗糙度、风蚀量及其与地表附着物相关性等土壤可蚀性差异。观测可知旱作传统翻耕农田就地起沙量最大，土壤可蚀性最小，是当地沙尘的主要来源之一；柠条林地和退耕草地粗糙度分别是翻耕农田的3.61和2.91倍；免耕、退耕草地和柠条林地都能有效减少地表风蚀，土壤可蚀性明显较强；传统翻耕农田、冬小麦地风蚀颗粒主要集中在近地表，为就地起沙；提高“杂草频度”即植被覆盖率，对有效防治就地起沙、提高土壤可蚀性效果明显；免耕农田集沙量与观测高度为乘幂函数关系，其它均呈多项式关系。

关键词: 控释肥, 控释肥, 水田, 氨态氮, 氨挥发

Abstract:

Abstract: We studies and comparative analysis of different field use types of soil erodibility about its surface roughness(Z0), wind erosion quantity and its correlation and correlation with surface fixtures on no-tillage field, the traditional tillage field, winter wheat field, the returning farmland to grassland (alfalfa) and shrub field (Caragana Fabr.) in this article. Observation we can see the traditional tillage field wind erosion is the most seriously, soil erodibility least, is a major source of local dust storm. Shrub field and the returning farmland to grassland surface roughness(Z0) are high than traditional tillage field 3.61 and 2.91 times. No-tillage, returning farmland to grassland, shrub field can be effective in reduces wind erosion, soil erodibility capacity increases significantly. The mainly field erosion of conventional tillage fields, winter wheat are concentrate in the near-surface, it is belongs near-surface sand. Improvement “weeds-frequency degree” that is, vegetation coverage, the effective prevention and treatment in arid area can increase soil erodibility obvious. its belong power correlation between observation height and its sand erosion quantity in no-till field, others fields are polynomial relations.