| 高寒地区紫花苜蓿对土壤养分的影响 |
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| 引用本文： | 魏卫东.高寒地区紫花苜蓿对土壤养分的影响[J].安徽农业科学,2008,36(7):2828-2830. |
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| 作者姓名： | 魏卫东 |
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| 作者单位： | 青海大学农牧学院,青海西宁,810003 |
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| 摘 要： | 目的]探讨种植紫花苜蓿对高寒地区土壤养分的影响。方法]通过田间试验,研究在高寒地区种植紫花苜蓿后其土壤中有机质、氮素、磷素、钾素等养分的变化情况。结果]高寒地区种植紫花苜蓿可明显提高土壤中有机质、全氮和碱解氮含量,而土壤全磷含量的变化相对较弱。在青海高寒地区种植紫花苜蓿2年后,土壤耕作层中有机质、全氮、碱解氮的含量分别增加17.70%1、4.45%、13.53%,而全钾、速效磷和速效钾的含量则分别下降1.63%、9.03%和12.67%。结论]在高寒地区种植紫花苜蓿可以改善土壤氮素水平,在种植过程中应增施磷钾肥以充分发挥其培肥地力、改良土壤、防治水土流失的作用。
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| 关 键 词： | 紫花苜蓿 高寒地区 土壤养分 |
| 文章编号： | 0517-6611(2008)07-02828-02 |
| 修稿时间： | 2007年11月10 |
Study on the Effects of Planting Medicago sativa L.on Soil Nutrients in High-cold Area |
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| WEI Wei-dong.Study on the Effects of Planting Medicago sativa L.on Soil Nutrients in High-cold Area[J].Journal of Anhui Agricultural Sciences,2008,36(7):2828-2830. |
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| Authors: | WEI Wei-dong |
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| Abstract: | Objective] The aim of the research was to discuss the effects of planting Medicago sativa L.on the soil nutrients in high-cold area.Method] In field experiment,the changes of soil nutrients such as organic matter,nitrogen,phosphorus and potassium after planting M.sativa in high-cold area were studied.Result] Planting M.sativa in high-cold area could obviously increase the contents of organic matter,total nitrogen and alkaline-hydrolytic nitrogen,while the changes of total phosphorus content were relatively weaker.After planting M.sativa for 2 years in high-cold area,the contents of organic matter,total nitrogen and hydrolysable nitrogen in cultivated soil were increased by 17.70%,14.45% and 13.53% resp.,while the contents of total potassium,available phosphorus and available potassium were decreased by 1.63%,9.03 % and 12.67% resp.Conclusion] Planting M.sativa in high-cold area could improve the nitrogen level in soil.In its planting process,phosphorus and potassium should be applied to play the functions of raising up land fertility,improving the soil and controlling the soil and water loss. |
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| Keywords: | Medicago sativa L High-cold area Soil nutrients |
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