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当前位置: 首页 > 文章 > 太湖地区绿肥还田模式下氮肥的深度减量效应 应用生态学报 2015,26 (6) 1673-1678
Position: Home > Articles > Further reduction of nitrogen fertilizer application in paddy field under green manuring of Taihu Area,China Chinese Journal of Applied Ecology 2015,26 (6) 1673-1678

太湖地区绿肥还田模式下氮肥的深度减量效应

作  者：
赵冬;颜廷梅;乔俊;杨林章;汤芳;宋云飞
单  位：
金坛市国土资源局;中国科学院南京土壤研究所
关键词：
太湖地区;绿肥还田;无机氮追肥;免施基肥
摘  要：
通过绿肥还田条件下免施基肥的氮肥深度减量试验,研究了稻季田面水氮素含量、氮素径流损失及水稻产量的变化.结果表明:在太湖地区绿肥还田模式下,追施150 kg·hm-2无机氮,与施基肥相比,不施基肥可以大大降低田面水的氮素浓度,减少了17.2%的氮素径流流失,且作物产量提高了2.8%.无机氮肥仅作追肥的施肥方式是可行的,但过量减施或增施无机氮肥均不能获得最高的产量.在太湖地区尝试紫云英还田条件下免施基肥,同时补充133 kg·hm-2无机氮作追肥,既可以大大减少无机肥的投入、保证水稻产量,也可以减少稻田氮素的排放量,实现水稻产量效应和环境效应的协调.
译  名：
Further reduction of nitrogen fertilizer application in paddy field under green manuring of Taihu Area,China
作  者：
ZHAO Dong;YAN Ting-mei;QIAO Jun;YANG Lin-zhang;TANG Fang;SONG Yun-fei;Institute of Soil Science,Chinese Academy of Sciences;Institute of Soil and Water Conservation,Chinese Academy of Sciences & Ministry of Water Resources;University of Chinese Academy of Sciences;Jintan Bureau of Land Resources;
关键词：
Taihu Area;;return of green manure to soil;;topdressing of inorganic nitrogen fertilizer;;no basal dressing
摘  要：
This study focused on the nitrogen loss via runoff,change of nitrogen in different forms in surface water in paddy field,and grain yield,through further reduction of nitrogen fertilizer application rate under green manuring without basal dressing.Results showed that with 150 kg·hm-2inorganic N fertilizer input after return of green manure to soil,no basal dressing could not only sharply reduce N concentration in surface water and decrease 17.2% of N loss,but also increase2.8% of grain yield in comparison with basal dressing.It was a worthwhile farming method that inorganic nitrogen fertilizer was not used for basal dressing but for topdressing after return of green manure to soil in Taihu Area.However,the grain yield would decrease if the rate of topdressing nitrogen was excessively reduced or increased.After all,it was feasible to realize harmonization of grain yield and environmental benefits in Taihu Area,with 133 kg·hm-2inorganic N fertilizer input after return of green manure to soil as well as no application of basal dressing,which could greatly reduce N ferti-lizer input and N loss as well as ensure rice yield.

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