小麦-玉米轮作期间不同施肥处理氮素的淋溶形态及数量.pdfVIP

农业环境科学学报2010，29(8)：1624—1632 Journalof Science Agro—Environment 小麦一玉米轮作期间不同施肥处理氮素的淋溶形态及数量 高忠霞1，一，杨学云1，周建斌1，王祥1，王 宏3 西榆林719000) 摘要：利用大型回填土渗漏池研究了陕西关中平原小麦一玉米轮作年生长周期内壤土不同施肥处理氮素淋溶的动态变化。结果 和有机肥配施处理(NPM)明显降低了淋溶到100 累积淋溶量比NP处理分别降低了64．4％、42．9％和54．8％，这与配施有机肥后提高了土壤的持水保肥能力有关，说明有机肥与化肥 合理配合施用可以降低氮素的淋溶损失。 关键词：小麦一玉米轮作；施肥；氮素淋溶；溶解性有机氮 中图分类号：X522文献标志码：A 文章编号：1672—2043(20LO)08—1624—09 FormsandAmountsof inLeachatesAffectedDifferentFertilizationsafteroneWheat-maizeRo— Nitrogen by tation GA0 Jian—binl，WANG Zhong—xial。，YANGXue—yunl，ZHOU Xian91，WANGHon93 ofResources＆EnvironmentSciences，NorthwestAF ofConsultationService (1．College University，Yangling712100，China；2．Department onEnvironmentalScienceand Yulin AffairsBureauYulin TechnologyCity，Yulin719000，China；3．Water City，Yulin719000，China) fromsoilsresultsinlowNuse andenvironment wasconstructedatthe Abstract：Nitrogen(N)leaching efficiency deterioration．Lysimeters south oftheLoessPlateau inthe toevaluatethefomlsandamountsof inthe Plain，Shaanxi，China edge locatingGuanzhong nitrogen leachatesunderfertilizationsawheat—maizerotationbetween2007and2008．Thefertilizationtreatments fertilizerasthe during were(1)no Nand amountsleachedfromthesoil control，(2)inorganicphosphorus(P)fertilizers(NP)，and(3)NP+organicmanure(NPM)．Nitrogen thewheat-maizerotationwere astheNOi-N asthedissolved lowestastheNH；-N． during greater form，next organicnitrogen(DON)，and Theratiosof