Reducing nitrogen losses through ammonia volatilization and surface runoff to improve apparent nitrogen recovery of double cropping of late rice using controlled release urea.
Controlled release fertilizer can reduce nitrogen losses to the environment while increasing grain yield and improving apparent nitrogen recovery (ANR) of rice. However, few studies have evaluated the comparative efficacy of different polymer-coated urea products on nitrogen (N) losses, ANR, and N uptake of rice. A 2-year field experiment was conducted to compare the effects of three different types of polymer-coated urea fertilizer on nitrogen losses through NH3volatilization and surface runoff to the environment, ANR, grain yield, and N uptake as compared to conventional urea of rice. Six treatments including (1) control with 0 kg N ha-1(CK), (2) basal application of urea (Ub), (3) split application (Us) of urea (50% at transplanting, 25% at tillering, and 25% at panicle stages), (4) CRU-1 (polyurethane-coated urea), (5) CRU-2 (degradable polymer-coated urea), and (6) CRU-3 (water-based polymer-coated urea) all applied at 165 kg N ha-1. It was found that CRU-2 resulted in the highest grain yield and panicle numbers among the N fertilization treatments in 2013 and 2014. Applying CRU could help increase N uptake in rice, reduce N losses through NH3volatilization and surface runoff, and hence improve ANR. Its single dose can meet the nutrient demand of the rice plant. Controlled release urea could be adopted as an effective mitigation alternative to retard N losses through NH3volatilization and surface runoff while improving ANR of double cropping of late rice.
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Pengfei
P
Li
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Jianwei
J
Lu
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Wenfeng
W
Hou
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Yonghui
Y
Pan
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Yang
Y
Wang
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Muhammad Rizwan
MR
Khan
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Tao
T
Ren
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China.
Rihuan
R
Cong
College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China. lixiaokun@mail.hzau.edu.cn.|Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Wuhan, 430070, China. lixiaokun@mail.hzau.edu.cn.|Microelement Research Center, Huazhong Agricultural University, Wuhan, 430070, China. lixiaokun@mail.hzau.edu.cn.
Xiaokun
X
Li
D000383:Agriculture / Q000379:methods*; D000641:Ammonia / Q000737:chemistry*; D005308:Fertilizers; D009584:Nitrogen / Q000737:chemistry*; D012275:Oryza / Q000254:growth & development*; D012987:Soil; D014508:Urea / Q000737:chemistry*; D014835:Volatilization
D005308:Fertilizers; D012987:Soil; D000641:Ammonia; D014508:Urea; D009584:Nitrogen
Biodegradable polymer; Double cropping rice system; Grain yield; Polyurethane; Super hybrid rice; Water-based polymer