干旱区生态环境知识资源中心(Arid): Water productivity of forage sorghum in response to winter cover crops in semi-arid irrigated conditions

Arid

DOI	10.1016/j.fcr.2022.108552
	Water productivity of forage sorghum in response to winter cover crops in semi-arid irrigated conditions
	Paye, Wooiklee S.; Acharya, Pramod; Ghimire, Rajan
通讯作者	Ghimire, R
来源期刊	FIELD CROPS RESEARCH
ISSN	0378-4290
EISSN	1872-6852
出版年	2022
卷号	283
英文摘要	Forage sorghum (Sorghum bicolor (L.) Moench) is a suitable alternative for corn silage in water-limited environments due to its similar yield potential as corn but with less water input. Cover cropping could further improve forage sorghum yield and water productivity, making it the best alternative forage crop for arid and semi-arid regions. This two-year study evaluated the effect of fallow and cover crops on soil volumetric water content (VWC), soil water extraction, changes in soil water storage (Delta S), seasonal crop evapotranspiration (ETseasonal), cropping system evapotranspiration (ETsystem), seasonal crop water productivity (CWPseasonal), cropping system water productivity (CWPsystem) and forage sorghum yield under a no-till semi-arid irrigated condition. Treatments included three winter cover crop mixtures: grasses + brassicas + legumes (GBL), grasses + brassicas (GB), grasses + legumes (GL), and a no-cover crop control (fallow), arranged in a randomized complete block design with four replications. Cover crops significantly reduced soil VWC at the beginning and up to 30 days after sorghum planting (DAP). However, at 60 DAP, the VWC was mostly similar among all treatments, and at 90 DAP, it was 17-21% higher under the cover crop treatments than fallow. The ETseasonal was 22-26% higher under cover crops than fallow during cover crop growth, but it was 12-13% greater under fallow than the cover crops during forage sorghum growth. Total soil water extraction at sorghum harvest was 8-89% higher under fallow than cover crops treatments. Averaged across years, cover crop biomass yield was 11% greater with the GBL mixture than the GB and GL mixtures. Forage sorghum yield was 23%, 32%, and 18% higher under GBL, GB, and GL cover crop mixtures, respectively, than fallow. Compared to fallow, cover crop mixtures improved sorghum CWP by 38-43%. Results indicated that forage sorghum yield and CWP under semi-arid irrigated systems could be substantially improved with winter cover cropping than leaving the land fallow.
英文关键词	Cover cropping Soil water extraction Evapotranspiration Crop water productivity
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000803737000004
WOS关键词	SOIL PHYSICAL-PROPERTIES ; CROPPING SYSTEMS ; CORN YIELD ; EFFICIENCY ; NITROGEN ; FALLOW
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/2XILL650/392579
推荐引用方式 GB/T 7714	Paye, Wooiklee S.,Acharya, Pramod,Ghimire, Rajan. Water productivity of forage sorghum in response to winter cover crops in semi-arid irrigated conditions[J],2022,283.
APA	Paye, Wooiklee S.,Acharya, Pramod,&Ghimire, Rajan.(2022).Water productivity of forage sorghum in response to winter cover crops in semi-arid irrigated conditions.FIELD CROPS RESEARCH,283.
MLA	Paye, Wooiklee S.,et al."Water productivity of forage sorghum in response to winter cover crops in semi-arid irrigated conditions".FIELD CROPS RESEARCH 283(2022).