数字农科院2.0

Application of Blended Controlled-Release and Normal Urea with Suitable Maize Varieties to Achieve Integrated Agronomic and Environmental Impact in a High-Yielding Summer Maize System

文献类型： 外文期刊

作者： Ma, Mengjin;Li, Huan;Yan, Dongliang;Zhang, Yihan;Song, Miaomiao;Wang, Yongchao;Wang, Hao;Shao, Ruixin;Guo, Jiameng;Yang, Qinghua

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关键词： controlled release urea;maize varieties;high yield;ecological economic benefit;environmental impact

期刊名称： AGRICULTURE-BASEL

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年卷期： 2022 年 12.0 卷 8 期

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摘要： The use of blended controlled-release urea (CRU) with normal urea has appeared to effectively improve grain yield and nitrogen use efficiency in summer maize systems. Nevertheless, the environmental impacts based on a life cycle assessment (LCA) and the ecosystem economic benefits with different maize varieties and ratios of CRU and urea remain unclear. In our study, a consecutive two-year field experiment was designed in the North China Plain (NCP) using two nitrogen (N) rates (0 and 180 kg N ha(-1)), four N resources (urea-N, CRU-N:urea-N = 1:2, CRU-N:urea-N = 2:1 and CRU-N), and two maize varieties (ZD958 and YH988) in 2019 and 2020. The results showed that a once-off application of basal fertilizer in N180C2 (CRU-N:urea-N = 2:1) and N180C1 (CRU-N:urea-N = 1:2) achieved high grain yields in ZD958 and YH988 (11.0-13.5 Mg ha(-1) and 11.3-13.2 Mg ha(-1)), respectively. Compared to treatment N180U, treatment N180C2 reduced reactive N losses through N leaching (-34.6%), ammonia volatilization (-17.1%), and nitrous oxide emissions (-42.0%) in variety ZD958, whereas treatment N180C1 reduced reactive N losses through N leaching (-20.3%), ammonia volatilization (-13.2%), and nitrous oxide emission (-24.2%) in variety YH988. The N180C2 and N180C1 treatments achieved the lowest C footprint (267.4 and 267.9 kg CO2 eq Mg-1) for ZD958 and YH988, respectively. Furthermore, N180C2 and N180C1 achieved the highest ecosystem economic benefits for ZD958 and YH988 of 831 and 1101 $ ha(-1), respectively. In summary, the application of the mixture of controlled release urea and standard urea at appropriate N rates not only achieved a high grain yield but also enhanced the ecological economic benefits while mitigating the negative environmental impacts. To sum up, using the correct CRU-N management practices coordinated with suitable genetic varieties is an effective way of achieving sustainable and environmentally friendly maize production in a high-yielding summer maize system.

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