Deep placement of controlled-release and common urea achieves the win–win of enhancing maize productivity and decreasing environmental pollution

作者：Peng Wu, Jinyu Yu, Qinhe Wang, Zeyu Liu, Hua Huang, Qi Wu, Liangqi Ren, Guangxin Zhang, Enke Liu, Kemoh Bangura, Min Sun, Kejun Yang, Zhiqiang Gao, Peng Zhang, Zhikuan Jia, Jianfu Xue · 发表于：European Journal of Agronomy · 年份：2024 · DOI：10.1016/j.eja.2024.127484 · 被引用次数：12 · 研究领域：Rice Cultivation and Yield Improvement、Crop Yield and Soil Fertility、Polymer-Based Agricultural Enhancements

The application of controlled-release urea or deep fertilization is effective for increasing crop yields. However, more research is needed to determine whether the deep placement of controlled-release and common urea can increase crop productivity and reduce environmental pollution. Between 2019 and 2021, we conducted field experiments in semi-humid and drought prone areas of the Loess Plateau region in China to study the effects of different controlled-release and common urea fertilization methods on maize productivity. Further experiments were conducted in semi-arid areas in 2022 and 2023 to verify the research results. We used the traditional fertilization strategy with common urea (TFC) as the control, deep placement of common urea (DFC), traditional fertilization with controlled-release and common urea (TFB), and deep placement with controlled-release and common urea (DFB) as optimized fertilizer management strategies. The results showed that the deep placement of controlled release and common urea changed the temporal and spatial distributions of the soil NO 3 – -N and NH 4 + -N, which affected the N 2 O and NH 3 emissions. The NH 3 emissions under DFC, TFB, and DFB were lower by 29.78 %, 32.77 %, and 59.08 % than TFC, and N 2 O emissions were lower by 38.21 %, 40.96 %, and 72.89 %, respectively. Compared with TFC, the maize yields under DFC, TFB, and DFB were 7.91 %, 8.41 %, and 15.11 % higher, respectively, and the nitrogen use efficiencies were 14.23 %, 15.60 %, and ...