植物营养与肥料学报2017，Vol.23Issue(1)：231-237,7.DOI:10.11674/zwyf.16070
土壤N2O排放量和小麦、玉米效益俱佳的吡啶喷涂尿素适宜用量研究
Nitrapyrin-urea application amount with less soil N2O emission and highest profit in summer maize and winter wheat
摘要
Abstract
[Objectives] Appropriate nitrapyrin-urea application amount was studied for the less soil N2O emission and high profit in summer maize and winter wheat production system.[Methods] Nitrapyrin was sprayed on urea in ratio of 1.1％o to make nitrapyrin-urea.Four application rates were designed in summer maize and winter wheat in field plot experiments.For maize,the nitrapyrin-urea N rates were 0,180,270 and 360 kg/hm2,for wheat were 0,150,225 and 300 kg/hm2.Yield and nitrogen fertilizer profits were investigated;soil N2O emission was determined using the static chamber method.[Results] The results showed that soil N2O emission peaks appeared after the basal or topdressing fertilization of nitrapyrin-urea.With the increase of N fertilization rates,the soil N2O emission,N apparent loss,N2O emission intensity were increased.Compared with the N0,the yields of the crops were significantly increased by 27.9％-48.9％,28.3％-51.7％ and 28.1％-48.9％ in maize,wheat and the rotation system.There was no significant difference in maize yields between the N rates of 270 and 360 kg/hm2,and the net incomes of these two treatments were 5208.0 and 5425.4 yuan/hm2,respectively.The wheat yield and net income were both the maximum in the nitrapyrin-N fertilization rate of 225 kg/hm2.For the whole rotation system,the yields of grain were increased with nitrapyrin-N fertilization rates,compared to the treatments of nitrapyrin-N rates of 360 and 300 kg/hm2 in maize and wheat,the yields of the treatments of nitrapyrin-N rates of 270 and 225 kg/hm2 in maize and wheat were similar,while the soil N2O emission was decreased by 1.51 kg/hm2 and the N apparent loss in soil was decreased by 39.4 kg/hm2,and the N fertilization amount reduced by 165 kg/hm2,net income increased by 405.3 yuan/hm2.[Conclusions] Under the experimental condition,the appropriate nitrapyrin-N fertilization rates are 270 kg/hm2 for maize and 225 kg/hm2 for wheat.关键词
吡啶喷涂尿素/小麦/玉米轮作系统/N2O排放/产量/氮素表观损失Key words
nitrapyrin-N fertilization/rotation system of wheat and maize/N2O emission/yield/N apparent loss引用本文复制引用
魏珊珊,王艳群,李迎春,舒晓晓,彭正萍,石新丽,门明新..土壤N2O排放量和小麦、玉米效益俱佳的吡啶喷涂尿素适宜用量研究[J].植物营养与肥料学报,2017,23(1):231-237,7.基金项目
国家科技支撑计划项目(2013BAD11B) （2013BAD11B）
国家973计划项目(2012CB955904) （2012CB955904）
国家自然科学基金项目(41105115) （41105115）
河北农业大学中青年骨干教师境外研修 （）
河北农业大学青年学术带头人 （）
河北省自然科学基金项目(C2016204078)资助. （C2016204078）
