陕北黄土区衰退沙棘人工林改良土壤的作用
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国家"十二五"科技支撑计划项目"黄土及华北石质山地水土保持林体系构建技术研究与示范"(2011BAD38B0601)


Soil Improvement by Degrade Sea-buckthorn Forests in Loess Region of Northern Shaanxi Province
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    摘要:

    为研究衰退沙棘人工林对土壤的改良功能,对陕北黄土区衰退沙棘人工林分轻度、中度、重度3种衰退类型进行了研究。结果表明: (1) 3种衰退类型沙棘人工林0-60 cm土层土壤速效磷、速效钾含量较对照均有提高。(2) 轻度衰退沙棘人工林对40-60 cm土层土壤有效氮,0-20 cm速效磷含量有显著提高作用。对20-40 cm土层土壤有效氮含量有极显著提高作用(由14.23 mg/kg增至22.39 mg/kg)。中度衰退沙棘人工林对20-60 cm土壤有机质、有效氮有显著提高作用。重度衰退沙棘人工林对0-20 cm土壤全氮含量的提高作用显著低于对照坡面。(3) 3种衰退类型沙棘人工林对20-40 cm土层速效磷含量的作用表现为中度衰退沙棘人工林最大,其次是轻度衰退沙棘林。其他土层则表现为随着衰退程度加深,沙棘人工林对土壤改良作用减弱。

    Abstract:

    In order to investigate the soil improvement by degrade sea-buckthorn forest, soil properties in 0-60 cm soil layers under slightly, moderately and severely degrade sea-buckthorn forests were measured. (1) The concentrations of soil available P and K under the three degrade sea-buckthorn forests in 0-60 cm soil layers were larger than those under undisturbed slopes. (2) The increases were significant at the level of 0.05 for the concentrations of soil available N in 40-60 cm soil layer and soil available P in 0-20 cm soil layer under slightly degrade sea-buckthorn forest. The increase was significant(at the level of 0.01) for the concentration of soil available N in 20-40 cm soil layer under slightly degrade sea-buckthorn forest(The available N content increased from 14.23 to 22.39 mg/kg in 20-40 cm soil layer). The increases were also significant(at the level of 0.05) for the concentration of soil organic matter and soil available N in 20-60 cm soil layer under moderately degrade sea-buckthorn forest. Decrease was significant(at the level of 0.05) for the concentration of soil total N in 0-20 cm soil layer under severely degrade sea-buckthorn forest. (3) The increases of soil available P in 20-40 cm soil layer under the three degrade sea-buckthorn forests were in the following order: moderately degrade forest > slightly decayed forest > severely degrade forest. Soil available P in the 0-20 and 20-40 cm soil layers increased as the following order: slightly degrade forest > moderately degrade forest > severely degrade forest.

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刘蕾蕾,朱清科,赵维军,姚文俊,马欢,陈文思,卜耀军.陕北黄土区衰退沙棘人工林改良土壤的作用[J].水土保持通报,2014,(3):311-315

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  • 收稿日期:2013-12-23
  • 最后修改日期:2014-01-14
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  • 在线发布日期: 2016-03-29
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