首页|Optimized nitrogen application for maximizing yield and minimizing nitrogen loss in film mulching spring maize production on the Loess Plateau,China
Optimized nitrogen application for maximizing yield and minimizing nitrogen loss in film mulching spring maize production on the Loess Plateau,China
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国家科技期刊平台
NETL
NSTL
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Excessive use of N fertilizers(driven by high-yield goals)and its consequent environmental problems are becoming increasingly acute in agricultural systems.A 2-year field experiment was conducted to investigate the effects of three N application methods(application of solid granular urea once(OF)or twice(TF),application of solid granular urea mixed with controlled-release urea once(MF)),and six N rates(0,60,120,180,240,and 300 kg N ha-1)on maize yield,economic benefits,N use efficiency,and soil N balance in the maize(Zea mays L.)film mulching system on the Loess Plateau,China.The grain yield and economic return of maize were significantly affected by the N rate and application method.Compared with the OF treatment,the MF treatment not only increased the maize yield(increased by 9.0-16.7％)but also improved the economic return(increased by 10.9-25.8％).The agronomic N use efficiency(NAE),N partial factor productivity(NPFP)and recovery N efficiency(NRE)were significantly improved by 19.3-66.7,9.0-16.7 and 40.2-71.5％,respectively,compared with the OF treatment.The economic optimal N rate(EONR)of the OF,TF,and MF was 145.6,147.2,and 144.9 kg ha-1 in 2019,and 206.4,186.4,and 146.0 kg ha-1 in 2020,respectively.The apparent soil N loss at EONR of the OF,TF,and MF were 97.1-100.5,78.5-79.3,and 50.5-68.1 kg ha-1,respectively.These results support MF as a one-time N application method for delivering high yields and economic benefits,with low N input requirements within film mulching spring maize system on the Loess Plateau.
maize yieldN managementeconomic optimal N rateLoess Plateau
Qilong Song、Jie Zhang、Fangfang Zhang、Yufang Shen、Shanchao Yue、Shiqing Li
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State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,China
Life Science Department,Luoyang Normal University,Luoyang 471934,China
国家科技期刊平台
NSTL
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