气候变化领域集成服务门户(CCPortal): Integrated straw-derived biochar utilization to increase net ecosystem carbon budget and economic benefit and reduce the environmental footprint

CCPortal

DOI	10.1016/j.fcr.2023.109247
	Integrated straw-derived biochar utilization to increase net ecosystem carbon budget and economic benefit and reduce the environmental footprint
	Guo, Ru; Qian, Rui; Naseer, Muhammad Asad; Han, Fei; Zhang, Peng; Jia, Zhikuan; Chen, Xiaoli; Ren, Xiaolong
发表日期	2024
ISSN	0378-4290
EISSN	1872-6852
起始页码	307
卷号	307
英文摘要	Context Crop residues are often returned to the soil to achieve soil carbon (C) sequestration in the agricultural sector, thereby mitigating climate change and soil degradation. However, direct straw incorporation may increase the risks of greenhouse gas (GHG) and reactive nitrogen (Nr) emissions. Objective and methods To comprehensively evaluate whether straw-derived biochar is a feasible alternative to straw for increasing grain yields and soil C sequestration while reducing GHG and Nr emissions in cropland, we conducted a two-factor field trial on maize farmland in northwest China during 2019-2021. Factor one comprised three straw incorporation methods (straw removal (T), total straw incorporation (S), and straw-derived biochar incorporation (B; biochar application at a straw/biochar ratio of 33%)) and factor two comprised two nitrogen (N) fertilizer application rates (0 and 300 kg ha(-1)). The relative benefits of the treatments for the maize productivity, net ecosystem carbon budget (NECB), carbon footprint (CF), nitrogen footprint (NF), and net ecosystem economic benefits (NEEB) were comprehensively evaluated by using the life cycle assessment (LCA) and Z-score methods. Results N fertilizer application was the main factor that increased maize productivity, NECB, NF, and NEEB in the maize agroecosystem. Under conventional N application, NECB increased by 244.0% (1647.37 kg C ha(-1) yr(-1)) under SN compared with TN, and heterotrophic respiration (Rh) and N2O emissions increased by 70.3% and 34.9%, respectively. By contrast, BN increased NECB by 295.8% (1996.79 kg C ha(-1) yr(-1)), and decreased Rh and N2O emissions by 8.2% and 20.9%, respectively. Hence, BN reduced the net global warming potential (NGWP) and greenhouse gas intensity (GHGI) of the farmland ecosystems by 56.4% (1609.49 kg CO2-eq ha(-1) yr(-1)) and 46.5%, respectively, compared with SN. Moreover, the grain yield, water use efficiency (WUE) and N use efficiency increased significantly under BN compared with TN. Compared to SN, integrated straw-derived biochar utilization (pre-farm abatement + BN management on the farm) reduced the average CF and NF of the maize agroecosystem by 350.2% (4004.85 kg CO2-eq ha(-1) yr(-1)) and 16.5% (12.68 kg N-eq ha(-1) yr(-1)), respectively, and improved NEEB by $ 624.7 ha(-1) yr(-1). Conclusions Integrated straw-derived biochar utilization may be applied as a sustainable and economical straw alternative to straw for enhancing soil C sinks and reducing GHG and Nr emissions. Implications or significance Integrated straw-derived biochar utilization is an economically friendly and sustainable method for straw utilization in dryland maize production, and highly significant for mitigating climate and environmental degradation.
英文关键词	Straw-derived biochar; Net ecosystem carbon budget; Carbon footprint; Nitrogen footprint; Net ecosystem economic benefit
语种	英语
WOS研究方向	Agriculture
WOS类目	Agronomy
WOS记录号	WOS:001158055700001
来源期刊	FIELD CROPS RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306590
作者单位	Northwest A&F University - China; Northwest A&F University - China; Northwest A&F University - China; Ministry of Agriculture & Rural Affairs
推荐引用方式 GB/T 7714	Guo, Ru,Qian, Rui,Naseer, Muhammad Asad,et al. Integrated straw-derived biochar utilization to increase net ecosystem carbon budget and economic benefit and reduce the environmental footprint[J],2024,307.
APA	Guo, Ru.,Qian, Rui.,Naseer, Muhammad Asad.,Han, Fei.,Zhang, Peng.,...&Ren, Xiaolong.(2024).Integrated straw-derived biochar utilization to increase net ecosystem carbon budget and economic benefit and reduce the environmental footprint.FIELD CROPS RESEARCH,307.
MLA	Guo, Ru,et al."Integrated straw-derived biochar utilization to increase net ecosystem carbon budget and economic benefit and reduce the environmental footprint".FIELD CROPS RESEARCH 307(2024).