| 紫花苜蓿生长年限对土壤理化性状的影响 |
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| 引用本文： | 杨恒山,曹敏建,范富,张庆国,孙德智.紫花苜蓿生长年限对土壤理化性状的影响[J].中国草地学报,2006,28(6):29-32. |
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| 作者姓名： | 杨恒山 曹敏建 范富 张庆国 孙德智 |
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| 作者单位： | 1. 内蒙古民族大学农学院,内蒙古,通辽,028042
2. 沈阳农业大学农学院,辽宁,沈阳,110161 |
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| 摘 要： | 2003～2005年在内蒙古民族大学试验农场连续3年测定了紫花苜蓿试验田土壤理化性状的变化.结果表明,随生长年限的增加,紫花苜蓿地0～30cm土层的土壤容重减小了0.026g/cm3,总孔隙度增加了1%,有机质的含量增加了0.8g/kg,碱解氮的含量增加了33.69 mg/kg,速效磷的含量下降了6.94 mg/kg,速效钾的含量下降了121.04 mg/kg.有机质的增加以10～20cm土层最为明显,碱解氮的增加在0～10cm和10～20cm两个土层均较明显,速效磷的减少在0～10cm土层最大,速效钾的减少在各土层均较为明显.说明紫花苜蓿高产栽培中必须重视磷、钾肥的施用,特别是要提高追施钾肥的水平.
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| 关 键 词： | 紫花苜蓿 生长年限 土壤理化性状 |
| 文章编号： | 1673-5021(2006)06-0029-04 |
| 修稿时间： | 2006年5月22日 |
Effects of the Number of Growth Years of Alfalfa on the Physical and Chemical Properties of Soil |
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| YANG Heng-shan,CAO Min-jian,FAN Fu,ZHANG Qing-guo,SUN De-zhi.Effects of the Number of Growth Years of Alfalfa on the Physical and Chemical Properties of Soil[J].Chinese Journal of Grassland,2006,28(6):29-32. |
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| Authors: | YANG Heng-shan CAO Min-jian FAN Fu ZHANG Qing-guo SUN De-zhi |
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| Abstract: | The physical and chemical properties of soil in 0~30cm layer were studied from 2003 to 2005 at alfalfa fields in Inner Mongolia University for Nationalities farm.The results showed that the bulk density decreased by 0.026g/cm~3,while the porosity increased by 1%.The contents of organic matter and alkali-hydro N increased by 0.8g/kg and by 33.69mg/kg respectively,while that of available P decreased by 6.94mg/kg and available K decreased by 121.04mg/kg.The remarkable increasing amount of organic matter occurred in 10~20cm soil layer,while that of alkali-hydro N in 0~10cm and 10~20cm.The notable decrease of available P arised in 0~10cm,while available K remarkably decreased in 0~30cm.The trends of soil nutrient content showed that phosphoric and potash fertilizer was very important in high-yield culture techniques of alfalfa. |
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| Keywords: | Alfalfa Number of growth years Physical and chemical properties of soil |
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