| 摘要: |
| 对子午岭林区林地及开垦地进行野外调查及室内分析，探讨人为加速侵蚀对土壤肥力可持续性的影响。结果表明：人为加速侵蚀使地带性土壤遭破坏，表土每年流失0. 6～1. 2 cm；与林地相比，林地开垦后7和20年的农地土壤中，>0. 25mm水稳性团聚体减少了40％和68％；引起土壤水、气、热、养分等循环失调，土壤生态系统被破坏、可持续性减弱。针对目前现状，提出了促进土壤良性发展的措施。 |
| 关键词: 植被破坏，土壤侵蚀，加速侵蚀，黄土肥力 |
| DOI： |
| 分类号:S157.1 |
| 基金项目:西北农业大学校青年基金资助项目 |
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| Effect of Vegetation Destruction on Soil Fertility Development |
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| Abstract: |
| The effect of accelerated erosion on soil sustainable function is researched in this paper, using field investigation and analytic data.The result shows that accelerated erosion destroys region soil and the soil loss of surface layer is 0. 6～1. 2
cm/a. Compared with forest land, the waterstable aggregate content in cultivated land
(after 7 years and 20 years of reclaimation) decreases by 40% -89%, thus resulting in
the imbalance of water, air and heat and the breakdown of eco-environmental system in
soil.To all these adversities,measures for sustainable development are proposed. |
| Key words: vegetation destruction,soil erosion,accelerated erosion,loess fertility |
