气候变化领域集成服务门户(CCPortal): Comparison of Carbon Footprint Differences in Nitrogen Reduction and Density Increase in Double Cropping Rice under Two Evaluation Methods

CCPortal

DOI	10.3390/agronomy14040803
	Comparison of Carbon Footprint Differences in Nitrogen Reduction and Density Increase in Double Cropping Rice under Two Evaluation Methods
	Zhang, Wei; Fu, Zhiqiang; Zhao, Xinhui; Guo, Huijuan; Yan, Lingling; Zhou, Mengyao; Zhang, Leyan; Ye, Yumeng; Liu, Wen; Xu, Ying; Long, Pan
发表日期	2024
EISSN	2073-4395
起始页码	14
结束页码	4
卷号	14 期号:4
英文摘要	Optimized fertilizer use improves crop yield and mitigates environmental pollution associated with crop production. Fertilizer and plant density are core strategies to ensure food security and cope with climate change. However, little is known about the long-term interactive effect of reduced nitrogen (N) and increased density on yield and C (Carbon) balance. In this study, field experiments were conducted in a double-cropping rice region to evaluate long-term effects on yield and carbon footprint (CF) by crop-based and soil-based methods. Treatments were set for 10% reduction in N coupling with conventional density (N1D1), 20% higher density (N1D2), 40% higher density (N1D3), and 20% reduction in N coupling with conventional density (N2D1), 20% higher density (N2D2), and 40% higher density (N2D3), with the prevailing practices as control, conventional plant density, and fertilizer dose. Results showed that the yield continued to increase with increasing density; under the same density, reducing N by 10% is more beneficial for yield improvement and for CH4 emission reduction. Compared with CK, reducing N application by 10% generally increased the annual yields by 7.34-23.25% on average, and reduced CH4 emissions by 16.19-22.11%, resulting in a reduced crop-based carbon footprint of 22.24-26.82%, and a reduced soil-based carbon footprint of 22.08-32.85%. While reducing N application by 20% increased the annual yields by 5.00-20.19% and reduced the CH4 emission by 1.66-4.93%, it reduced crop-based carbon footprints by 1.81-10.05% and reduced soil-based carbon footprints by 7.22-19.86%. As density increased, the crop-based CF decreased, whereas the soil-based CF increased. Overall, the highest yield and the lowest soil-based CF and unit yield CF (CFy) were observed in N1D3. Regarding sustainability, a 10% reduction in N, along with an increase in density to 40%, can be recommended for double-cropping rice production.
英文关键词	double-cropping rice; reduced N fertilizer; increased plant density; crop-based carbon footprint; soil-based carbon footprint
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences
WOS记录号	WOS:001210458600001
来源期刊	AGRONOMY-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304802
作者单位	Hunan Agricultural University; Ministry of Agriculture & Rural Affairs
推荐引用方式 GB/T 7714	Zhang, Wei,Fu, Zhiqiang,Zhao, Xinhui,et al. Comparison of Carbon Footprint Differences in Nitrogen Reduction and Density Increase in Double Cropping Rice under Two Evaluation Methods[J],2024,14(4).
APA	Zhang, Wei.,Fu, Zhiqiang.,Zhao, Xinhui.,Guo, Huijuan.,Yan, Lingling.,...&Long, Pan.(2024).Comparison of Carbon Footprint Differences in Nitrogen Reduction and Density Increase in Double Cropping Rice under Two Evaluation Methods.AGRONOMY-BASEL,14(4).
MLA	Zhang, Wei,et al."Comparison of Carbon Footprint Differences in Nitrogen Reduction and Density Increase in Double Cropping Rice under Two Evaluation Methods".AGRONOMY-BASEL 14.4(2024).