不同施氮量下双季稻连作体系土壤氨挥发损失研究  

Effects of different nitrogen application rates on ammonia volatilization from paddy fields under double-harvest rice system

作　　者：王淳[1] 周卫[1] 李祖章[2] 刘秀梅[2] 孙刚[2] 夏文建[1,2] 王秀斌[1] 刘光荣[2] 

机构地区：[1]中国农业科学院农业资源与农业区划研究所,农业部植物营养与养分循环重点开放实验室,北京100081 [2]江西省农业科学院土壤肥料与资源环境研究所,南昌330200

出　　处：《植物营养与肥料学报》2012年第2期349-358,共10页Journal of Plant Nutrition and Fertilizers

基　　金：公益性行业(农业)科研专项(201003059,201003016);国家水稻产业技术体系课题;国家重点基础研究发展计划课题(2007CB109307);国家科技支撑计划(2007BAD89B18);中央级公益性科研院所基本科研业务费专项资金资助

摘　　要：采用密闭室间歇通气法研究双季稻连作体系不同施氮量下土壤氨挥发损失。结果表明:早稻氨挥发损失主要发生在施肥后的15d内,第3～5d出现峰值,损失总量为N 22.60～162.0 kg/hm2,损失率为29.29%～52.32%;晚稻氨挥发主要发生在施肥后的11d内,第3 d出现峰值,损失总量为N 22.35～141.4 kg/hm2,损失率为35.75%～46.82%;早、晚稻各生育期及连作周期的氨挥发量均与施氮量呈显著线性关系。An enclosed intermittent vent method was used to measure the ammonia （NH3 ） volatilization from a paddy soil of double-harvest rice system under different application amounts of urea. The results show that the NH3 -N volatilization （NV） loss occurs mainly within 15 days, and the peak occurs during 3-5 days after the fertilization in the early rice season, and in the late rice season the NV loss occurs mainly within 11 days, and the peak appears in the third days after the fertilization. The total NV losses vary from N 22.60 - 162.0 kg/hm^2 and N 22. 35 - 141.4 kg/hm^2 in the early and late rice seasons, respectively, and the percents of the losses to the applied N amounts range from 29.29%-52.32% and 35.75%-46. 82%, respectively. The total NV losses and their percentages in all of the early rice, late rice or the double-harvest seasons are linearly increased with the increase of the urea application rates.

关 键 词：双季稻连作 水稻土 氨挥发 施氮量 

分 类 号：S511.42[农业科学—作物学]