Can the Blended Application of Controlled-Release and Common Urea Effectively Replace the Common Urea in a Wheat-Maize Rotation System? A Case Study Based on a Long-Term Experiment
文献类型： 外文期刊
作者： Zhang, Ling 1 ; Xue, Wen-Tao 1 ; Sun, Hao 1 ; Hu, Yun-Cai 2 ; Wu, Rong 1 ; Tian, Ye 1 ; Chen, Yi-Shan 1 ; Ma, Liang 1 ; Chen, Qian 1 ; Du, Ying 1 ; Bai, Yang 1 ; Liu, Shan-Jiang 1 ; Zou, Guo-Yuan 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, Beijing 100097, Peoples R China
2.Tech Univ Munich, Chair Plant Nutr, Dept Plant Sci, D-85354 Freising Weihenstephan, Germany
关键词： blending urea; wheat-maize rotation system; grain yield; soil n and c stocks; environmental impacts; ecosystem economic benefit
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN： 2223-7747
年卷期： 2023 年 12 卷 24 期
页码：
收录情况： SCI
摘要： The one-time application of blended urea (BU), combining controlled-release urea (CRU) and uncoated urea, has proven to be a promising nitrogen (N) management strategy. However, the long-term sustainability of blending urea remains largely unexplored. To assess whether a single application of blended urea could effectively replace split uncoated urea applications, a long-term field experiment was conducted in the North China Plain (NCP). The results indicated that, when compared to common urea (CU) at the optimal N rate (180 kg N ha-1), BU achieved comparable grain yields, N uptake and NUE (61% vs. 62). BU exhibited a 12% higher 0-20 cm soil organic nitrogen stock and a 9% higher soil organic carbon (C) stock. Additionally, BU reduced life-cycle reactive N (Nr) losses and the N footprint by 10%, and lowered greenhouse gas (GHG) emissions and the C footprint by 7%. From an economic analysis perspective, BU demonstrated comparable private profitability and a 3% greater ecosystem economic benefit. Therefore, BU under the optimal N rate has the potential to substitute split applications of common urea in the long-term and can be regarded as a sustainable N management strategy for wheat and maize production in the NCP.
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