干旱区生态环境知识资源中心(Arid): Optimizing drip irrigation and nitrogen fertilization regimes to reduce greenhouse gas emissions, increase net ecosystem carbon budget and reduce carbon footprint in saline cotton fields

Arid

DOI	10.1016/j.agee.2024.108912
	Optimizing drip irrigation and nitrogen fertilization regimes to reduce greenhouse gas emissions, increase net ecosystem carbon budget and reduce carbon footprint in saline cotton fields
	Xiao, Chao; Zhang, Fucang; Li, Yi; Fan, Junliang; Ji, Qingyuan; Jiang, Fuchang; He, Zijian
通讯作者	Zhang, FC ; Li, Y ; Fan, JL
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2024
卷号	366
英文摘要	The arid and semi-arid regions of northwest China play a crucial role in ensuring the national cotton production. Soil water potential (SWP)-based deficit irrigation is potentially an effective irrigation strategy in maintaining agricultural productivity in these regions. However, the impact of various SWP thresholds and nitrogen application rates on carbon balance and environmentally friendly economic benefits in cotton systems remains unclear. A two-year field experiment was conducted to investigate the effects of three SWP thresholds (W1, W2 and W3: -30, -20 and -10 kPa) and three nitrogen rates (F1, F2 and F3: 200, 300 and 400 kg ha- 1) on greenhouse gas (GHG) emissions, seed cotton yield, carbon storage, and economic benefits in drip-fertigated saline cotton fields. The results showed that increasing nitrogen rate significantly increased N2O emission, while higher irrigation level reduced the soil's capacity to absorb CH4. Moreover, increasing irrigation level and nitrogen rate led to higher soil CO2 emission. The W3F3 obtained the highest seed cotton yield, ranging from 6529.6 to 6804.6 kg ha- 1. Nitrogen application increased soil organic carbon storage by 5.6-12.5 %, whereas excessive nitrogen fertilization resulted in significant losses in soil inorganic carbon, ranging from 20.7 % to 34.9 %. The W2F2 enhanced net ecosystem carbon budget accumulation by increasing the input efficiency of carbon and reducing GHG emissions, and excessive GHG emissions limited the net ecosystem carbon budget of highfertilization treatments. Meanwhile, the increased fertilizer and environmental costs reduced net ecosystem economic benefit. Fertilizer was identified as the major contributor to the ecosystem carbon footprint, accounting for more than 22.9 %. In conclusion, the W2F2 not only obtained the optimal soil carbon sequestration and carbon balance in the system, but also generated economic profits comparable to those of the high-fertilization treatments while producing lower direct GHG emissions. These findings highlight the significance of rational drip irrigation and nitrogen fertilization in maintaining high productivity and carbon sustainability in saline cotton fields.
英文关键词	Cotton production Net ecosystem carbon budget Carbon footprint Soil inorganic carbon Environmental cost
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001197814200001
WOS关键词	SOIL ORGANIC-CARBON ; CLIMATE-CHANGE ; CO2 EMISSIONS ; N2O EMISSIONS ; WATER ; CHINA ; MANAGEMENT ; STOCKS ; MATTER ; YIELD
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402702
推荐引用方式 GB/T 7714	Xiao, Chao,Zhang, Fucang,Li, Yi,et al. Optimizing drip irrigation and nitrogen fertilization regimes to reduce greenhouse gas emissions, increase net ecosystem carbon budget and reduce carbon footprint in saline cotton fields[J],2024,366.
APA	Xiao, Chao.,Zhang, Fucang.,Li, Yi.,Fan, Junliang.,Ji, Qingyuan.,...&He, Zijian.(2024).Optimizing drip irrigation and nitrogen fertilization regimes to reduce greenhouse gas emissions, increase net ecosystem carbon budget and reduce carbon footprint in saline cotton fields.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,366.
MLA	Xiao, Chao,et al."Optimizing drip irrigation and nitrogen fertilization regimes to reduce greenhouse gas emissions, increase net ecosystem carbon budget and reduce carbon footprint in saline cotton fields".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 366(2024).