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/（hm^2·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/hm^2.
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 NO3^--N leaching, the highest value was 110 kg/hm^2 in N800 treatment, the lowest was 0 kg/hm^2 at N200 treatment, at N400 treatment it was 22 kg/hm^2. In the 2002 corn season there were also leaching of NO3^--N, the loss of NO3^--N were 2 kg/hm^2 in N200 treatment, 16 kg/hm^2 in N400 treatment, 50 kg/hm^2 in N800 treatment.
出处
《干旱地区农业研究》
CSCD
北大核心
2006年第6期7-10,28,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金(30570335)
欧盟项目SUSDEV-CHINA(ICA4-CT-2002-10004)
关键词
硝态氮
淋失
华北地区
nitrate-nitrogen
leaching
water balance
