李晓欣,胡春胜,张玉铭,董文旭,欧阳志云.华北地区小麦-玉米种植制度下硝态氮淋失量研究[J].干旱地区农业研究,2006,(6):7~10 |
华北地区小麦-玉米种植制度下硝态氮淋失量研究 |
Losses of nitrate-nitrogen from a wheat-Corn rotation in north China |
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DOI:10.7606/j.issn.1000-7601.2006.06.02 |
中文关键词: 硝态氮 淋失 华北地区 |
英文关键词:nitrate-nitrogen leaching water balance |
基金项目:国家自然科学基金(30570335); 欧盟项目SUSDEV-CHINA(ICA4-CT-2002-10004) |
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中文摘要: |
应用水量平衡法计算土壤水的下渗量,通过suction cup采集土壤溶液并测定其中硝态氮含量,不同施肥处理下不同作物的硝态氮淋失量分析结果表明:2001~2002年,冬小麦生长季硝态氮的淋失损失严重,其中施N量200,400,800 kg/(hm2.a)3个施肥处理180 cm土层淋失的硝态氮量分别为0,22,110 kg/hm2。玉米生长季也存在硝态氮的淋失,上述3施肥处理180 cm层次淋失的硝态氮量分别为2,16,50 kg/hm2。 |
英文摘要: |
A study was conducted to assess the leaching of nitrate-nitrogen in wheat-corn season in North China Plain during 2001~2002 year.Leaching losses were calculated from measured flux of water percolation, soil water NO-3-N concentrations extracted by suction cup.The results showed that in the 2001~2002 wheat season, there was serious NO-3-N leaching, the highest value was 110 kg/hm2 in N800 treatment, the lowest was 0 kg/hm2 at N200 treatment, at N400 treatment it was 22 kg/hm2.In the 2002 corn season there were also leaching of NO-3-N, the loss of NO-3-N were 2 kg/hm2 in N200 treatment, 16 kg/hm2 in N400 treatment, 50 kg/hm2 in N800 treatment. |
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