灌木固沙林改良土壤效益分析
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西北农林科技大学科研启动基金“陕北风沙区人工植被稳定结构与效益研究”(01140403)


Benefits of Shrub Sand-fixation Forest for Soil Improvement
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    摘要:

    对榆林沙区固沙灌木林地的土壤养分进行了测定。分析结果表明,灌木固沙林具有明显的改良土壤的作用,该区沙地防风固沙林地土壤有机质明显增加,养分状况得到较大改善,其中土壤有机质增加2.2-20.6倍,全N增加2-22倍,速效P增加0.7倍,速效K增加41%,而土壤pH值变化不显著,均呈微碱性。研究结果表明,沙地土壤改良是一个非常缓慢的过程,榆林沙地土壤养分总体仍呈现贫瘠状态。

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    Soil nutrients of shrub sand-fixation forest in the Yulin sandy area were measured in this study.Results showed that shrub sand-fixation forest had a significant effect for soil improvement.Soil organic matter in windbreak and sand-fixation forest was increased obviously in the area and the soil nutrient status was improved considerably.Soil organic matter,total N,available P,and available K were increased by 2.2 to 20.6 times,2 to 22 times,0.7 times,and 41%,respectively.However,the pH of soil did not change significantly and presented an alkalescent condition.The study indicates that soil improvement in sandy land is a very slow process and soil nutrients of Yulin sand land still present a lean soil condition as a whole.

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周米京,高城雄,郝文功,高国雄,朱首军.灌木固沙林改良土壤效益分析[J].水土保持通报,2009,(1):138-141

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  • 收稿日期:2008-08-05
  • 最后修改日期:2008-09-28
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  • 在线发布日期: 2014-11-26
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