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水肥耦合对华北高产农区小麦-玉米产量和土壤硝态氮淋失风险的影响

标题: 水肥耦合对华北高产农区小麦-玉米产量和土壤硝态氮淋失风险的影响
英文标题: Effect of fertilization and irrigation on wheat-maize yield and soil nitrate nitrogen leaching in high agricultural yield region in North China Plain
作者: 张玉铭,张佳宝,胡春胜,赵炳梓,朱安宁,张立周,宋利娜
英文作者: ZHANG Yu-Ming,ZHANG Jia-Bao,HU Chun-Sheng,ZHAO Bing-Zi,ZHU An-Ning,ZHANG Li-Zhou,SONG Li-Na
出版时间: 2011-01-01
机构: 河北农业大学
关键词: 冬小麦-夏玉米轮作,水肥耦合,土壤,硝态氮,淋失风险,累积峰,根区
英文关键词: Wheat-maize rotation system,Water and fertilizer coupling,Soil,Nitrate nitrogen,Leaching risk,Accumulation peak,Root zone
刊名: 中国生态农业学报
英文刊名: CHINESE JOURNAL OF ECO-AGRICULTURE
ISSN: 1671-3990
期号: 019
卷号: 003
基金: ^A中国科学院知识创新工程项目^BKSCX1-YW-09-05;KSCX2-EW-N-08;KZCX2-YW-Q1-07^D1%^A国家自然科学基金^B30970534^D2
页码: 532-539
分类号: S365
摘要: 在封丘农田生态系统国家试验站,通过多组水肥组合试验,研究了冬小麦-夏玉米轮作下,水、肥对作物产量、硝态氮在土壤剖面中的分布特征及其淋失风险的影响.结果表明,适宜灌溉情况下,氮磷配施是提高作物产量的关键,氮钾配施与磷钾配施增产效果不明显.统计结果表明,各因素对小麦产量影响次序依次为氮肥≥磷肥>灌溉>钾肥,对玉米产量的影响次序为氮肥>磷肥>钾肥>灌溉,只有氮磷对作物产量的影响达到统计学上的显著性差异.随着施氮量和灌溉量的增加,硝态氮累积峰峰值增加,峰厚度加厚,出现位置加深,且根区外硝态氮含量亦显著增加,极大地提高了硝态氮的淋失风险.适宜氮肥用量与适宜灌溉是减轻硝态氮淋失风险的关键,氮磷配施可有效降低深层土壤硝态氮累积.研究区域适宜氮肥用量为每年400 kg(N)·hm-2,适宜磷肥用量为每年225kg(P2O5)·hm-2,一般降雨年型全年灌溉量以280 mm左右为宜.
英文摘要: Field experiment with several coupled fertilization and irrigation treatments was conducted in State Experimental Station of Agro-Ecosystem in Fengqiu.Effect of fertilization and irrigation on wheat-maize yield,distribution of nitrate nitrogen in soil profile and the risk of nitrate nitrogen leaching under wheat-maize rotation system was studied.The results indicated that reasonable combined application of nitrogen and phosphorus fertilizers was the key to improve crop yield under appropriate irrigation rat...