陕西黄土区近30a典型(土娄)土剖面肥力演变研究
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国家科技支撑计划项目“全国耕地质量重大问题与安全战略研究”(2006BAD09B10); 国家科技支撑计划项目(2006BAD05B10); 中国科学院方向性项目(KSCX1-YW-N-15-04)


Changes of Fertility in Typical Lou Soil Profiles During Recent 30 Years in the Loess Area of Shaanxi Province
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    摘要:

    利用典型剖面历史分析资料,采用原位采样及与历史资料相同的分析方法研究了陕西黄土区近30a来(土娄)土肥力的演变及剖面养分分布。结果表明,与1982年第二次土壤普查资料相比,2008年(土娄)土耕层、犁底层中养分含量(除全钾)均有增加,耕层增幅最大,有机质增加了104.6%,全氮增加了61.7%,全磷增加了21.6%,碱解氮增加了67.3%,速效磷增加了255%;全钾含量在整个剖面都有不同程度的降低,耕层降幅最小,为9.6%。2008年各养分的表聚系数大于1982年,说明近30a来(土娄)土壤肥力不断提高,正向着有利于作物生长吸收的方向演变。

    Abstract:

    The study bosed on historical date of typical Lou soil profile in different years. In order to know the historical evolution and characteristics of nutrient on soil profile , the change of fertility and profile distribution of typical Lou soil in recent 30 years was studied by sampling . Results showed that the soil nutrient contents increased significantly in different soil layers ( except for total potassium) since the 1980s. Organic matter increased by 104. 6%; total nitrogen , by 61. 7%; total phosphorus, by 21. 6%; available nitrogen ,by 67 . 3 %; and available phosphorus, by 255 percent .Total potassium in the whole profile decreased to some extent , but in the top-soil , it declined only by 9. 6 %. In top-soil , the ration of soil nutrient content were greater in 2008 than those in 1982 . Long-term fertilization is helpful to enhance soil fertility and the fertility of Lou soil is propitious to growth and absorption for plants .

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摄晓燕,谢永生,王辉,张应龙.陕西黄土区近30a典型(土娄)土剖面肥力演变研究[J].水土保持通报,2010,(2):150-153

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  • 收稿日期:2009-08-26
  • 最后修改日期:2009-11-15
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  • 在线发布日期: 2014-11-26
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