气候变化领域集成服务门户(CCPortal): Assessing trade-offs among productive, economic, and environmental indicators of forage systems in southern Tibetan crop-livestock integration

CCPortal

DOI	10.1016/j.scitotenv.2023.162641
	Assessing trade-offs among productive, economic, and environmental indicators of forage systems in southern Tibetan crop-livestock integration
	Duan, Cheng; Yu, Chengqun; Shi, Peili; Huangqing, Dongzhi; Zhang, Xianzhou; Dai, Erfu
发表日期	2023
ISSN	0048-9697
EISSN	1879-1026
卷号	876
英文摘要	Fostering crop-livestock integration via crop-forage rotation provides opportunities to cope with land degradation, feed deficit, and agropastoral sustainability. Farmers' preferences for forage options are infiuenced by economic ben-efit, environmental preference, and productive performance. However, there is little information available on evaluat-ing multiple trade-offs of forage systems for the design of crop-forage rotations. Here, we performed a comprehensive evaluation to compare the economic, environmental, and productive indicators of five typical forage systems in terms of habitat conditions, soil ecosystem services, economic profit, and forage yield and nutritive value on the southern Tibetan Plateau. Alfalfa pasture and silage corn were mostly cultivated in lower altitudes, with more abundant precip-itation, and higher growing degree days. Soil carbon and nitrogen accumulation were significantly higher in perennial alfalfa than in the other forage systems. The relative feed value of alfalfa pasture was also evidently greater than the other forage systems, whereas the yield of silage corn was among the highest. Alfalfa pasture presented superior eco-nomic benefits compared to the others. But the alfalfa pasture over six years showed a significant decrease in soil car -bon and nitrogen storage, net present value, and yield. Forage systems generally have more soil carbon accumulation, but only forage legumes are more likely to positively affect soil nitrogen retention compared to cereal croplands. The trade-offs among economic, environmental, and productive indicators demonstrated that annual forage systems (silage corn, forage oat, and ryegrass) met productive target rather than environmental and economic objectives, while peren-nial alfalfa showed synergies among the three goals. These findings indicate that integrating crop-forage rotation, par-ticularly introducing legume forages into farming systems is an adaptive option for crop-livestock integration on the southern Tibetan Plateau. Given the large topographic variation, suitable crop-forage systems should be designed for the heterogeneous Yarlung Zangbo River valleys. Among them, alfalfa-silage corn intercropping is recommended as a promising system to meet both productivity and profitability.
关键词	Crop-forage rotation Crop-livestock integration Economics Environmental preference Trade-offs
英文关键词	SOIL ORGANIC-MATTER; GRASS-CLOVER LEYS; ARABLE ROTATIONS; NITROGEN POOLS; LOESS PLATEAU; CARBON; ALFALFA; YIELD; DYNAMICS; LEGUME
WOS研究方向	Environmental Sciences
WOS记录号	WOS:000956024700001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283787
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; China Geological Survey
推荐引用方式 GB/T 7714	Duan, Cheng,Yu, Chengqun,Shi, Peili,et al. Assessing trade-offs among productive, economic, and environmental indicators of forage systems in southern Tibetan crop-livestock integration[J],2023,876.
APA	Duan, Cheng,Yu, Chengqun,Shi, Peili,Huangqing, Dongzhi,Zhang, Xianzhou,&Dai, Erfu.(2023).Assessing trade-offs among productive, economic, and environmental indicators of forage systems in southern Tibetan crop-livestock integration.SCIENCE OF THE TOTAL ENVIRONMENT,876.
MLA	Duan, Cheng,et al."Assessing trade-offs among productive, economic, and environmental indicators of forage systems in southern Tibetan crop-livestock integration".SCIENCE OF THE TOTAL ENVIRONMENT 876(2023).