| 控释氮肥对紫色土坡耕地N2O排放量的影响 |
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| 引用本文： | 欧阳平,林超文,刘海涛,朱波,罗付香,朱永群,张建华.控释氮肥对紫色土坡耕地N2O排放量的影响[J].农业科学与技术,2017,18(3). |
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| 作者姓名： | 欧阳平 林超文 刘海涛 朱波 罗付香 朱永群 张建华 |
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| 作者单位： | 1. 成都土壤肥料测试中心,四川成都,610041;2. 四川省农业科学院土壤肥料研究所,四川成都,610066 |
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| 基金项目： | China，National Key Technology R & D Program (2012BAD05B03-8).四川省财政创新能力提升工程，国家科技支撑计划 |
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| 摘 要： | 为探明控释氮肥对紫色土坡耕地氧化亚氮(N20)排放量的影响,以不施肥为对照(CK),研究了尿素(UR)、缓控释氮肥(CR)、缓控释氮肥+尿素(25％CR,尿素75％)各处理对玉米产量、玉米生育期的径流和氮素损失量以及N2O排放量的影响.结果表明,对照处理玉米产量最低,径流损失量最大,壤中流氮素损失量和NO排放量要远低于施肥处理,说明施肥是造成氮素流失和氧化亚氮排放的主要原因.缓控释氮肥处理生育期的壤中流氮素损失量在4个处理中最大,为31.7 kg/hm2,但N20排放量为0.35 kg/hm2,比尿素处理降低了37％.控释氮肥+尿素处理壤中流氮索损失在施肥处理中最低,为20.9 kghm2,N2O排放量比尿素处理低15％.控释氮肥的氮素在生育期内缓慢释放,低的土壤无机氮使得控释氮肥能够降低坡耕地N2O排放,但控释氮肥会导致壤中流氮素损失量增大.因此,控释氮肥和尿素配合使用在降低N2O排放的同时,还能减少壤中流氮素损失.
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| 关 键 词： | 控释肥 N2O排放量 紫色土 坡耕地 |
Effects of Application of Controlled Release Nitrogen Fertilizer on Emission in Slope Cultivated Land with Purple Soil |
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| Ping OUYANG,Chaowen LIN,Haitao LIU,Bo ZHU,Fuxiang LUO,Yongqun ZHU,Jianhua ZHANG.Effects of Application of Controlled Release Nitrogen Fertilizer on Emission in Slope Cultivated Land with Purple Soil[J].Agricultural Science ＆ Technology,2017,18(3). |
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| Authors: | Ping OUYANG Chaowen LIN Haitao LIU Bo ZHU Fuxiang LUO Yongqun ZHU Jianhua ZHANG |
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| Abstract: | In order to study effects of application of controlled release fertilizer on nitrous oxide (N2O) emission in slope cultivated land with purple soil,four treatments including the control group (CK),urea (UR),controlled release nitrogen fertilizer (CR),and controlled release nitrogen fertilizer+urea (25％CR,75％UR) were set up,and their impacts on maize yield,surface runoff and nitrogen loss in the growth period of maize and N2O emission were studied.The results show that maize yield,surface runoff,nitrogen loss from subsurface flow,and N2O emission in the control group was far lower than that in the fertilization treatments,revealing that fertilization was the main reason for nitrogen loss and N2O emission.Among the four treatments,nitrogen loss from subsurface flow in the treatment CR was the highest,up to 31.7 kg/hm2,but N2O emission was 0.35 kg/hm2,which was 37％ less than that in the treatment UR.Nitrogen loss from subsurface flow in the treatment 25％ CR was the lowest,only 20.9 kg/hm2,and N2O emission was 15％ less than that in the treatment UR.Nitrogen was slowly released from controlled release nitrogen fertilizer in the growth period,and controlled release nitrogen fertilizer could reduce N2O emission from slope cultivated land due to low content of soil inorganic nitrogen,but it could increase the nitrogen loss from subsurface flow.Therefore,the combination of controlled release fertilizer and urea can not only reduce N2O emission but also decrease nitrogen loss from subsurface flow. |
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| Keywords: | Controlled release fertilizer N2O emission Purple soil Slope cultivated land |
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