| 黄土丘陵区坡耕地土地退化研究 |
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| 引用本文： | 陈奇伯,齐实,孙立达,吴晓伟.黄土丘陵区坡耕地土地退化研究[J].水土保持通报,2004,24(1):12-15. |
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| 作者姓名： | 陈奇伯 齐实 孙立达 吴晓伟 |
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| 作者单位： | 吉林大学,环境与资源学院,吉林,长春,130026 |
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| 基金项目： | 国家自然科学基金(40072093,40273047)资助 |
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| 摘 要： | 通过对人工种植黄花草木樨样地的监测，根据土壤养分含量的变化研究了改良退化土壤的效果。在种植黄花草木樨后，除了土壤全钾和速效磷含量下降以外，土壤有机质、水解性氮、全氮、全磷、速效钾养分含量皆明显增加。磷、钾下降的原因与黄花草木樨生长发育过程的需肥特性有关。在黄花草木樨生长发育过程中，应该注意追施磷、钾肥，可达到“以磷增氮”，“以钾促氮”的目的。实践表明，种植黄花草木樨这一技术具有改良土壤，培肥地力的作用，它是干旱、半干旱地区改良退化土壤的一种优良牧草。
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| 关 键 词： | 黄花草木樨 退化土壤 盐碱土 生物技术 养分含量 |
| 文章编号： | 1000-288X(2004)01-0008-04 |
| 收稿时间： | 2003/3/29 0:00:00 |
Land Degradation of Slope Fields in Hilly and Gully Areas of Loess Plateau |
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| CHEN Qi-bo,QI Shi,SUN Li-da and WU Xiao-wei.Land Degradation of Slope Fields in Hilly and Gully Areas of Loess Plateau[J].Bulletin of Soil and Water Conservation,2004,24(1):12-15. |
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| Authors: | CHEN Qi-bo QI Shi SUN Li-da and WU Xiao-wei |
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| Abstract: | The effect of Melilotus officinalia on improving degraded soil is studied according to the change in nutrient content of soil after planting. The results show that planting Melilotus officinalia can increase soil organic matter, total N,hydrolytic N, total P, and available K significantly, but decrease available P and total K. The reason for the latter decreases is that Melilotus officinalia needs phosphate fertilizer and potassium fertilizer to satisfy its growth. Therefore, during the growth of Melilotus officinalia, phosphate fertilizer and potassium fertilizer should be applied reasonably in order to boost nitrogen levels in the soil. This biotechnology technique functions to improve saline alkaline soil and increase the fertility of soil. The experiment indicates that Melilotus officinalia is an excellent kind of pasturage for improving the degraded soil in arid and semiarid regions. |
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| Keywords: | Melilotus offcinalia degradation soil saline alkaline soil biotechnology soil nutrient content |
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