| 新民市农田土壤有效氮、磷、钾含量变化分析 |
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| 引用本文： | 郭希敏.新民市农田土壤有效氮、磷、钾含量变化分析[J].农业机械化与电气化,2009(2):14-16. |
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| 作者姓名： | 郭希敏 |
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| 作者单位： | 沈阳市农业检测中心; |
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| 摘 要： | 对新民市露地和保护地土壤有效氮、磷、钾养分现状进行了调查，对露地土壤有效磷、有效钾在28a间含量变化进行了分析。结果显示：露地土壤有效氮肥力水平较高，全市平均含量为98．96mg／kg；土壤有效磷含量递增，平均含量从1980年的4．96mg／kg上升到2008年的11．61mg／kg；土壤有效钾呈递减趋势，平均含量从1980年的128．08mg／kg下降到2008年的79．90mg／kg．平均每年降低1．90％。保护地土壤有效氮、磷、钾的含量随使用年限的增加呈上升趋势.
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| 关 键 词： | 新民市 土壤 有效氮 有效磷 有效钾 |
Evolution Trend of Soil Available N, P and K Contents in Xinmin District |
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| Authors: | GUO Ximin |
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| Institution: | Shenyang Agriculture Testing Center;Shenyang 110034;China |
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| Abstract: | A detailed survey was made for soil available nitrogen, phosphorus and potassium in agricultural fields and sheltered grounds in Xinmin District, and a comparative study on the evolutionary trend of soil available P and K was made on the basis of the survey of soil nutrients in 1980. As for agricultural fields, the average content of available nitrogen was 98.96mg/kg in 2008; the average content of available soil phosphorus has increased gradually from 4.96mg/kg in 1980 to 11.61mg/kg in 2008; a gradually de... |
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| Keywords: | Xinmin District soil available nitrogen available phosphorus available potassium |
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