南方农业学报2023，Vol.54Issue(12)：3550-3560,11.DOI:10.3969/j.issn.2095-1191.2023.12.009
不同施肥方式对再生稻田氨挥发及氮肥利用率的影响
Effects of different fertilizer application methods on ammonia volatilization and nitrogen fertilizer utilization in regenerating rice fields
摘要
Abstract
[Objective]Investigated the effects of controlled-release urea and ordinary urea with application,as well as one-time deep application of controlled-release urea,on the ammonia volatilization loss and nitrogen fertilizer utilization in regenerated rice fields.In order to provide scientific guidance for the development of measures to increase production and reduce emissions in regenerating rice fields in China.[Method]Rice cultivars Fengliangyouxiang No.1 and Yongyou 4949 were used as experimental materials,and four treatments were set up:no nitrogen control(CK),conventional frac-tional application of common urea(FFP),combination of ordinary urea with controlled-release urea(CRU+U)and one-time 10 cm deep application of controlled-release urea(CRUR)in the root zone.Determination of trends in ammonia vola-tilization,two-season yield and nitrogen fertilizer utilization in regenerated rice fields under different fertilization treat-ments.[Result]Compared with FFP treatment,CRUR treatment and CRU+U treatment significantly reduced the ammo-nia volatilization flux during the growth period of regenerated rice,the ammonia volatilization loss and ammonia volatil-ization loss rate of CRUR treatment were reduced by 77.01%～78.10%and 92.17%～95.35%,the ammonia volatilization loss and ammonia volatilization loss rate of CRU+U treatment decreased by 53.60%～55.75%and 65.45%～66.72%;Com-pared with FFP treatment,CRUR treatment and CRU+U treatment significantly reduced the concentration of NH4+-N and NO3--N in field water;Compared with FFP treatment,The yield of regenerated rice,yield in regeneration season and ni-trogen use efficiency increased by 30.00%～30.38%,12.10%～20.28%and 84.31%～87.37%,CRU+U treatment increased the yield of regenerated rice in the first season,the yield in the regeneration season and the nitrogen use efficiency by 10.0%～16.46%,10.60%～18.84%and 35.14%～36.13%;The ammonia volatile flux of regenerated rice was significantly positively correlated with the NH4+-N concentration of field surface water.There was no significant difference in the aver-age ammonia volatilization loss between Yongyou 4949 and Fengliangyouxiang No.1,the average yield of Yongyou 4949 in the first and regeneration seasons was 12.50%and 13.11%higher than that of Fengliangyouxiang No.1.[Conclusion]Compared with conventional fertilization,both the mixture of ordinary urea and controlled-release urea with one base and one follow-up application,and one-time deep application of controlled-release urea at 10 cm in the root zone,significantly reduced the ammonia volatilization loss in paddy field,increase the yield of regenerated rice in two seasons,and improve nitrogen fertilizer use efficiency.The one-time deep application of controlled-release urea at 10 cm in the root zone had a better effecton yield increase and emission reduction than the fertilization treatment of ordinary urea mixed with controlled-release urea one base and one pursuit.This study provided a theoretical basis for realizing the light simplified fertilization of regenerated rice.关键词
控释尿素/根区施肥/再生稻/氨挥发/氮肥利用率Key words
controlled-release urea/root zone fertilization/regenerating rice/ammonia volatilization/nitrogen fer-tilizer utilization rate分类
农业科技引用本文复制引用
万雪薇,丁紫娟,聂江文,朱波,刘章勇,蒋梦蝶..不同施肥方式对再生稻田氨挥发及氮肥利用率的影响[J].南方农业学报,2023,54(12):3550-3560,11.基金项目
国家重点研发计划项目(2022YFD2301000) National Key Research and Development Program of China(2022YFD230100) （2022YFD2301000）
