气候变化领域集成服务门户(CCPortal): High sugarcane yield and large reduction in reactive nitrogen loss can be achieved by lowering nitrogen input

CCPortal

DOI	10.1016/j.agee.2024.109032
	High sugarcane yield and large reduction in reactive nitrogen loss can be achieved by lowering nitrogen input
	Yang, Linsheng; Zhou, Yifang; Meng, Bo; Zhan, Jian; Xi, Min; Deng, Yan; Wu, Wenge; Lakshmanan, Prakash; Chen, Xinping; Zhang, Fusuo
发表日期	2024
ISSN	0167-8809
EISSN	1873-2305
起始页码	369
卷号	369
英文摘要	Nitrogen (N) fertilisation is critical for sugarcane crop production. Consequently, overuse of N fertiliser in sugarcane is widespread and it is most prevalent in China. Yet, a comprehensive analysis of sugarcane N balance accounting for different reactive N (Nr) loss pathways, crop N use and soil N retention using 15 N labelled fertilisers under commercial high -input cropping conditions is lacking. A two-year field experiment with 5 N levels (0 - 560 kg N ha -1 ; N0, N210, N300, N390, N560) was conducted to quantify the effect of N rate on sugarcane yield, Nr loss through different loss pathways, crop N use and soil N retention, and to identify an optimal N rate that sustain high yield whilst reducing Nr loss in Southern China. The results showed that optimal N rate (N300) had similar yield compared with farmer practice (N560) for the plant crop and the ratoon crop. Nitrogen leaching and ammonia loss were increased significantly with increase in N rate, with farmer practice recording the highest Nr loss. Compared with farmer practice, under optimal N application, N leaching was reduced from 211 kg ha -1 to 107 kg ha -1 and from 244 kg ha -1 to 165 kg ha -1 for the plant and ratoon crops, respectively. The ammonia volatilization from the plant crop and the ratoon crop in the optimal N treatment was 24.8 kg ha -1 and 27.0 kg ha -1 , respectively, which are considerably less compared with the emission from the farmer practice. There was no significant difference in nitrous oxide emission between optimal N rate and farmer practice. 15 N labelling studies showed that crop N recovery, soil N residue and fertiliser N lost at the optimal N rate were 20.9%, 24.9% and 54.2%, respectively, as opposed to 12.5%, 14.8% and 72.7%. respectively, under farmer practice. To the best of our knowledge, this study forms the first comprehensive evaluation of sugarcane N balance accounting Nr loss, N use and native N soil stock covering a wide range of N supply simultaneously in the plant and ratoon crops under commercial crop production condition. This study thus provides very valuable new knowledge not only for crop N supply optimisation in high -input sugarcane production systems as in China but also for sugarcane greenhouse gas accounting studies particularly from climate change mitigation and bioenergy production context.
英文关键词	N leaching; Ammonia loss; N2O emissions; N balance; Sugarcane
语种	英语
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS记录号	WOS:001235612700001
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305827
作者单位	Anhui Academy of Agricultural Sciences; Southwest University - China; Guangxi Academy of Agricultural Sciences; University of Queensland; China Agricultural University
推荐引用方式 GB/T 7714	Yang, Linsheng,Zhou, Yifang,Meng, Bo,et al. High sugarcane yield and large reduction in reactive nitrogen loss can be achieved by lowering nitrogen input[J],2024,369.
APA	Yang, Linsheng.,Zhou, Yifang.,Meng, Bo.,Zhan, Jian.,Xi, Min.,...&Zhang, Fusuo.(2024).High sugarcane yield and large reduction in reactive nitrogen loss can be achieved by lowering nitrogen input.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,369.
MLA	Yang, Linsheng,et al."High sugarcane yield and large reduction in reactive nitrogen loss can be achieved by lowering nitrogen input".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 369(2024).