Environmental trade-offs and productivity gains through sustainable nitrogen use in an intensive high-input sugarcane production system in China

文献类型： 外文期刊

第一作者： Yang, Linsheng

作者： Yang, Linsheng;Yang, Linsheng;Zhou, Yifang;Meng, Bo;Wang, Huayang;Lakshmanan, Prakash;Deng, Yan;Chen, Xinping;Zhou, Yifang;Liu, Xiaoyan;Lakshmanan, Prakash;Luo, Ting;Lakshmanan, Prakash;Zhang, Fusuo

作者机构：

关键词： Sugarcane; Nitrogen management; Yield; Reactive nitrogen loss

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.2； 五年影响因子：6.2 ）

ISSN： 0926-6690

年卷期： 2025 年 232 卷

页码：

收录情况： SCI

摘要： High nitrogen (N) fertiliser input in Chinese sugarcane production has substantially increased the risk of reactive N (Nr) loss and crop productivity improvement for a long time. However, there is no comprehensive study of sustainable N management on different N loss pathways in a high N input cropping system of China. Here, a field experiment with 5 treatments (control (CK); conventional urea (OPT; 300 kg N ha(-1)); partial substitution of urea with coated urea (OPT-CU; 300 kg N ha(-1)); nitrification inhibitor (3,4-dimethylpyrazole phosphate, DMPP)blended urea (OPT-NI; 300 kg N ha(-1)); and partial substitution of urea with organic N fertilizer (OPT-ON; 300 kg ha(-1))) was conducted in a commercial sugarcane farm for two cropping years to understand how different N management strategies attenuate Nr losses (emission of ammonia and nitrous oxide (N2O), and N leaching) of sugarcane crops. The results showed that OPT-CU has increased sugarcane yield by 2.5 %-9.5 % and decreased ammonia and N2O emission by about 33.9 % and 44.4 %, respectively, compared with OPT treatment. Coated urea application however increased N leaching loss by 29.5 % (174 kg ha(-1)) relative to OPT (136 kg ha(-1)). OPTNI treatment decreased N2O emission by 53.0 % but increased ammonia volatilization as much as 52 %, compared with OPT treatment. Though the N leaching loss was similar to other treatments, cane yield of OPT-NI crops was 3.03-5.18 % lower than that OPT treatment. More significantly, in this study OPT-ON was found to reduce both ammonia and N2O emission by about 42.7 % and 32.5 %, respectively, but again N leaching loss (139 kg ha(-1)) and cane yield were comparable to OPT treatment. Taken together, our study concludes that partial substitution of synthetic N with organic N fertiliser could yield both economic and environmental benefits maximally, making sugarcane a more sustainable food and energy crop.

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