用原状土柱研究太湖地区稻麦轮作农田养分淋溶量  

On Nutrient Leaching Amount of Rice-Wheat Rotation Field with Monolith Lysimeter in Taihu Lake Area

作　　者：张静[1] 王德建[1] 王灿[1] 

机构地区：[1]中国科学院南京土壤研究所常熟农业生态国家实验站

出　　处：《土壤》2008年第4期591-595,共5页Soils

基　　金：国家重点基础研究发展规划项目(2005CB121100);国家科技支撑计划项目(2006BAJ10B06)资助

摘　　要：采用原状模拟土柱，对太湖地区不同施肥水平下稻麦轮作农田NH4^＋-N、NO3^--N和TP的淋溶量进行了研究。初步结果表明：麦田NH4^＋-N、No3^--N和TP的淋溶量分别为0．36～0．64、2．74～16．42和0．05～0．19kg／hm。，各占化肥施用量的0．2％～0．4％、4．8％～8．1％和0．2％～0．7％；稻田NH4^＋-N、NO3^＋--N和TP的淋溶量分别为0．36～1．04、0．86～3．01和0．24～1，17kg／hm^2，各占化肥施用量的0．2％～0A％、0．6％～1．7％和0．8％～8．2％。猪粪能增加养分淋溶量，尤其显著促进了P素向下迁移；秸秆减少麦季土壤无机N的淋溶损失。An experiment using monolith lysimeter including different fertilization levels was conducted to study the nutrient leaching amount of rice-wheat rotation field in Taihu Lake area. Results showed that the amount of NH4^＋-N, NO3^--N and TP leaching in wheat season were 0.36 - 0.64, 2.74 - 16.42 and 0.05 - 0.19 kg/hm^2, respectively, accounting for 0.2% - 0.4%, 4.8% - 8.1% and 0.2% - 0.7% of applied fertilizer; the amount of leaching in rice season were 0.36 - 1.04, 0.86 - 3.01 and 0.24 - 1.17 kg/hm^2, respectively, accounting for 0.2% - 0.4%, 0.6% - 1.7% and 0.8% - 8.2%. Compared to using fertilizer only, manure combined with fertilizer increased the nutrient leaching, particularly for phosphorus, while straw combined fertilizer reduced the nitrogen leaching from wheat field.

关 键 词：原状土柱 稻麦轮作 养分淋溶量 太湖流域 

分 类 号：S181[农业科学—农业基础科学]