干旱区生态环境知识资源中心(Arid): Optimizing planting density and irrigation depth of hybrid maize seed production under limited water availability

Arid

DOI	10.1016/j.agwat.2022.107759
	Optimizing planting density and irrigation depth of hybrid maize seed production under limited water availability
	Shi, Rongchao; Wang, Jintao; Tong, Ling; Du, Taisheng; Shukla, Manoj Kumar; Jiang, Xuelian; Li, Donghao; Qin, Yonghui; He, Liuyue; Bai, Xiaorui; Guo, Xiaoxu
通讯作者	Tong, L
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2022
卷号	271
英文摘要	Improvement in seed vigor and yield of hybrid maize is required to ensure food security. Optimal planting density and irrigation depth are critical for hybrid maize seed production in arid areas. Using data from 2012 to 2017, a new integrated model optimized planting density and border irrigation depth for achieving high yield and seed vigor of hybrid maize under limited water availability. For field experiments, a planting density of 9.75 plants m(-2) under full irrigation was in the control treatment. The results showed that water deficit decreased yield, evapotranspiration, and aboveground biomass per plant. The highest yield was obtained for the planting density of 12.75 plants m(-2) under full irrigation. The single crop coefficient and crop water production function models were modified to simulate evapotranspiration and yield, respectively. Using kernel number per plant and plant growth rate during the flowering stage, a kernel weight model was established. The maximum yield and minimum irrigation depth were weighted and kernel weight was constrained. Three minimum relative kernel weight (RKWmin) options were considered, option 1 with RKWmin= 1.00 (control), option 2 with RKWmin=0 (unconstrained), and option 3 with RKWmin ranged from 0.60 to 0.90. In option 1, the optimal irrigation depth during the growing season under control planting density decreased by 24.3-39.4% compared to the conventional practices. In option 2, yield increased but average kernel weight decreased by 25% than control. In the option 3, average yield and water use efficiency increased by 9.2% and 6.5% compared to option 1, respectively. The average planting density decreased by 10.2%, yield reduced by 2.0%, and water use efficiency reduced by 1.7%, but kernel weight increased by 9% compared to option 2. Thus option 3 can be recommended for hybrid maize seed production with limited water availability in arid regions of Northwest China. Our research provided a new theoretical method to improve yield, and ensure seed vigor of hybrid maize in arid regions.
英文关键词	Crop models Deficit irrigation Plant population Hybrid maize seed yield
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000880074000001
WOS关键词	GRAIN-YIELD ; DEFICIT IRRIGATION ; USE EFFICIENCY ; KERNEL WEIGHT ; ARID REGION ; NITROGEN MANAGEMENT ; CROP COEFFICIENT ; LOESS PLATEAU ; SALINE WATER ; EVAPOTRANSPIRATION
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391628
推荐引用方式 GB/T 7714	Shi, Rongchao,Wang, Jintao,Tong, Ling,et al. Optimizing planting density and irrigation depth of hybrid maize seed production under limited water availability[J],2022,271.
APA	Shi, Rongchao.,Wang, Jintao.,Tong, Ling.,Du, Taisheng.,Shukla, Manoj Kumar.,...&Guo, Xiaoxu.(2022).Optimizing planting density and irrigation depth of hybrid maize seed production under limited water availability.AGRICULTURAL WATER MANAGEMENT,271.
MLA	Shi, Rongchao,et al."Optimizing planting density and irrigation depth of hybrid maize seed production under limited water availability".AGRICULTURAL WATER MANAGEMENT 271(2022).