气候变化领域集成服务门户(CCPortal): Simulating long-term soil carbon storage, greenhouse gas balance, and crop yields in semi-arid cropping systems using DayCent model

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DOI	10.1007/s10705-023-10335-4
	Simulating long-term soil carbon storage, greenhouse gas balance, and crop yields in semi-arid cropping systems using DayCent model
	Bista, Prakriti; Hartman, Melannie D.; Delgrosso, Stephen J.; Thapa, Vesh R.; Ghimire, Rajan
发表日期	2024
ISSN	1385-1314
EISSN	1573-0867
起始页码	128
结束页码	1
卷号	128 期号:1
英文摘要	Crop-fallow systems are common in the arid and semi-arid Southwestern USA. The long fallow periods between crops reduce annual carbon (C) inputs and soil organic carbon (SOC) accumulation. Cover cropping is promoted to reduce the fallow period and increase residue C returned to the soil, but the long-term SOC sequestration and greenhouse gas (GHG) mitigation potential of cover cropping are not well understood for dry regions. This study quantifies long-term changes in SOC sequestration and net greenhouse gas (GHG) balance using the DayCent ecosystem model. We estimated SOC storage and nitrous oxide (N2O) and methane (CH4) emissions in no-till winter wheat (Triticum aestivum L.)-sorghum (Sorghum bicolor L. Moench)-fallow rotations with pea (Pisum sativum L.) and oat (Avena sativa L.) as cover crops and no-cover crop control. The DayCent simulation results on crop yields were evaluated with six years of observations and achieved R2 values of 0.66 and 0.81 for wheat grain and biomass yields, respectively. Similarly, the model captured the overall differences in cover crop biomass production. The simulations conducted for three decades showed a significantly greater SOC storage with cover cropping (26-36%) than without cover crops. Simulation of GHG emissions showed that oats as a cover crop could mitigate N2O emissions compared to control. Soil N2O emissions were greater with peas than with other cover crops, suggesting a smaller contribution of legume cover crops in reducing net GHG balance. Cover cropping could be a good strategy for long-term SOC storage in semi-arid regions, while their GHG mitigation potential varied with cover crop species.
英文关键词	Model; Soil organic carbon; Cover crops; Semi-arid region; Greenhouse gases
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:001142894700001
来源期刊	NUTRIENT CYCLING IN AGROECOSYSTEMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302139
作者单位	New Mexico State University; New Mexico State University; Colorado State University; United States Department of Agriculture (USDA)
推荐引用方式 GB/T 7714	Bista, Prakriti,Hartman, Melannie D.,Delgrosso, Stephen J.,et al. Simulating long-term soil carbon storage, greenhouse gas balance, and crop yields in semi-arid cropping systems using DayCent model[J],2024,128(1).
APA	Bista, Prakriti,Hartman, Melannie D.,Delgrosso, Stephen J.,Thapa, Vesh R.,&Ghimire, Rajan.(2024).Simulating long-term soil carbon storage, greenhouse gas balance, and crop yields in semi-arid cropping systems using DayCent model.NUTRIENT CYCLING IN AGROECOSYSTEMS,128(1).
MLA	Bista, Prakriti,et al."Simulating long-term soil carbon storage, greenhouse gas balance, and crop yields in semi-arid cropping systems using DayCent model".NUTRIENT CYCLING IN AGROECOSYSTEMS 128.1(2024).