干旱区生态环境知识资源中心(Arid): Soil carbon and nitrogen responses to forage cropping systems following irrigation retirement

Arid

DOI	10.1002/agj2.21523
	Soil carbon and nitrogen responses to forage cropping systems following irrigation retirement
	Paye, Wooiklee S.; Lauriault, Leonard M.; Acharya, Pramod; Ghimire, Rajan
通讯作者	Ghimire, R
来源期刊	AGRONOMY JOURNAL
ISSN	0002-1962
EISSN	1435-0645
出版年	2024
卷号	116 期号:2 页码:489-503
英文摘要	Limited annual precipitation and increasing scarcity of irrigation water are forcing farmers in arid and semi-arid regions to convert irrigated fields into dryland farming, yet their impacts on soil carbon (C) and nitrogen (N) fractions are not fully understood. This study evaluated changes in soil C and N fractions and forage production under four cropping systems after irrigation retirement in a semi-arid condition. Treatments included an annual winter wheat forage (Triticum aestivum L.) (AWW), a perennial wheat (PW) forage (T. aestivum L. x Thinopyrum spp.) (PW), a mixture of native grasses (NG), and a pasture crop (PC = AWW and NG mixture). Evaluation of various soil C and N fractions, forage dry matter yield, and nutritive value parameters suggested that soil inorganic N and potentially mineralizable N (PMN) were 38%-45% and 36%-44% greater in autumn 2020 and 62%-68% and 46%-55% greater in spring 2021 under AWW and PW, respectively, than NG and PC. Soil potentially mineralizable carbon (PMC) was 58%-129% and 64%-138% greater under NG and PW than AWW and PC. The responses of other soil C and N fractions varied with soil sampling dates but not with crops or crop x sampling date interaction. Total forage dry matter yield was 4016, 7849, 12,517, and 13,869 kg ha-1 for AWW, PW, PC, and NG, respectively, and PW had the best forage nutritive value. These results suggest soil C and N mineralization could be enhanced by adopting perennial systems, including NG, PW, and PC, while PW maintains good-quality forage production. Information on crop productivity and soil health response to irrigation retirement in semi-arid regions is lacking. The pasture crop and native grasses depleted soil's labile nitrogen reserve faster than annual or perennial wheat. Native grasses and pasture crops had the greatest forage yield, perennial wheat had the best forage nutritive value. Perennial wheat and grasses favored the accumulation of labile carbon (C), suggesting potential for long-term C storage.
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001151941900001
WOS关键词	ORGANIC-MATTER ; MICROBIAL BIOMASS ; AGRICULTURAL SOILS ; NUTRITIVE-VALUE ; COOL-SEASON ; GRASSLAND ; MANAGEMENT ; QUALITY ; MINERALIZATION ; SEQUESTRATION
WOS类目	Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402732
推荐引用方式 GB/T 7714	Paye, Wooiklee S.,Lauriault, Leonard M.,Acharya, Pramod,et al. Soil carbon and nitrogen responses to forage cropping systems following irrigation retirement[J],2024,116(2):489-503.
APA	Paye, Wooiklee S.,Lauriault, Leonard M.,Acharya, Pramod,&Ghimire, Rajan.(2024).Soil carbon and nitrogen responses to forage cropping systems following irrigation retirement.AGRONOMY JOURNAL,116(2),489-503.
MLA	Paye, Wooiklee S.,et al."Soil carbon and nitrogen responses to forage cropping systems following irrigation retirement".AGRONOMY JOURNAL 116.2(2024):489-503.