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

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2025-05-30 DOI:10.1016/j.indcrop.2025.121288

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

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Abstract

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). OPT-NI 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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中国集约化高投入甘蔗生产系统中可持续氮肥利用的环境权衡和生产力提高

长期以来，我国甘蔗生产中高氮肥的投入大大增加了活性氮（Nr）损失的风险，影响了作物生产力的提高。然而，中国高氮投入种植系统不同氮素流失途径的可持续氮素管理研究尚不全面。田间试验设5个处理(对照（CK）；常规尿素(OPT；300 公斤 N ha−1);包覆尿素（OPT-CU）部分取代尿素300 公斤 N ha−1);硝化抑制剂（3,4-二甲基吡唑磷酸，DMPP）-混合尿素(OPT-NI；300 公斤 N ha−1);有机氮肥部分替代尿素（OPT-ON）；300 kg ha−1))在一个商业甘蔗农场进行了为期两个种植年的试验，以了解不同的氮管理策略如何减少甘蔗作物的氮损失（氨和氧化亚氮（N2O）的排放以及氮淋失）。结果表明，与OPT处理相比，OPT- cu处理的甘蔗产量提高了2.5 % ~ 9.5 %，氨和N2O排放量分别减少了约33.9 %和44.4 %。然而，与OPT（136 kg ha−1）相比，包覆尿素使N淋失量增加了29.5% %（174 kg ha−1）。与OPT处理相比，OPT- ni处理减少了53.0 %的N2O排放，但增加了52 %的氨挥发。虽然氮淋失量与其他处理相似，但OPT- ni作物的甘蔗产量比OPT处理低3.03-5.18 %。更重要的是，在本研究中发现OPT- on处理分别减少了约42.7 %和32.5 %的氨和N2O排放，但氮淋失（139 kg ha - 1）和甘蔗产量与OPT处理相当。综上所述，我们的研究得出结论，用有机氮肥部分替代合成氮可以最大限度地产生经济和环境效益，使甘蔗成为一种更可持续的粮食和能源作物。

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.