| 河北山前平原区土壤剖面硝态氮时空分布规律试验研究 |
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| 引用本文： | 高恵嫣,杨路华,孙建峰,等.河北山前平原区土壤剖面硝态氮时空分布规律试验研究[J].中国农村水利水电,2014,0(1):6-10. |
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| 作者姓名： | 高恵嫣 杨路华 孙建峰 |
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| 作者单位： | 1.河北农业大学，河北保定 071001；2.石津灌区管理局，石家庄，050000 |
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| 摘 要： | 为分析农业生产对土壤硝态氮的影响，2011~2012年在河北省山前平原区冉庄实验站进行土壤硝态氮田间试验，选取农田种植区与非种植区，对照分析土壤硝态氮的时空分布及变化规律。结果表明：种植区耕层土层硝态氮分布在年内变化呈现正弦“S”状，而深部土层硝态氮分布呈现呈“W”状。小麦生育期内，硝态氮主要累积在0~100cm深度土层范围并形成峰值带，返青期达最大值；玉米生育期0~500cm土层剖面硝态氮的分布呈“双峰”曲线，最大峰值出现在150~260cm深度土层范围内，达106.36 mg/kg。非种植区0~500cm土层深度硝态氮的累积量为723.27 kg/hm2，种植区为1430.56~5126.05 kg/hm2，是非种植区的1.98~7.09倍。耕层以下土壤中的硝态氮淋溶量1294.13kg/hm2，为全年施肥量的52.29%。
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| 收稿时间： | 2013-05-27 |
| 修稿时间： | 2013-07-02 |
Experimental Study on the Spatial and Temporal Distribution of Soil Nitrate Nitrogen in Hebei Piedmont Plain |
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| Abstract: | Field experiment was conducted to analyze the affect on soil nitrate nitrogen by agricultural product at Ranzhuang experiment station in Hebei piedmont plain from 2011 to 2012.The spatial and temporal distribution of soil nitrate nitrogen was analyzed in planting area and non-planting area respectively. The results show that nitrate nitrogen content varies in sinusoidal curve at shallow tilth soil and shows in “W” shape at deep soil profile during the wheat-maize rotation period. Nitrate nitrogen is mainly accumulated in 0~100cm soil depth range and the maximum value occur in reviving stage in the wheat growth period. In the maize growth period, the distribution of nitrate nitrogen is double peak curve in 0~500cm soil profile, the maximum peak emerges at 150~260cm, the peak of soil nitrate content is between 36.7~106.36mg/kg. In 0~500cm soil layers, the cumulative amount of nitrate nitrogen is 723.27kg/hm2 at non-planting area and 1430.56~5126.05 kg/hm2 at planting area respectively, which is 1.98~7.09 times than that of the non-planting area. The amount of nitrate nitrogen leaching is 1294.13kg/hm2 into deep soil and it is 52.29% of the total amount of annual fertilization.. |
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