干旱区生态环境知识资源中心(Arid): An integrated model to optimize planting density and sufficient irrigation depth for increasing hybrid maize seeds yield

Arid

DOI	10.1007/s00271-022-00805-y
	An integrated model to optimize planting density and sufficient irrigation depth for increasing hybrid maize seeds yield
	Shi, Rongchao; Tong, Ling; Du, Taisheng; Shukla, Manoj Kumar; Jiang, Xuelian; Li, Donghao; Qin, Yonghui
通讯作者	Tong, L
来源期刊	IRRIGATION SCIENCE
ISSN	0342-7188
EISSN	1432-1319
出版年	2022
卷号	40 期号:6 页码:909-923
英文摘要	Optimizing planting density and irrigation depth of hybrid maize seed production is important for ensuring food and water security. A higher planting density increases grain yield to a certain level, but decreases seed vigor. Therefore, the aim of this study was to establish an integrated model that optimized planting density and sufficient border irrigation depth to increase yield, ensure the vigor, and save water for hybrid maize seed production in an arid region. The integrated model was based on the modified AquaCrop and single crop coefficient models to predict grain yield and evapotranspiration, respectively. Kernel weight was estimated by grain yield and kernel number, and a monomolecular model was used to fit kernel number per plant and plant growth rate during the flowering stage. An exponential relationship was found between kernel weight and seed vigor. The maximum grain yield and minimum irrigation depth were weighted in the objective function, and different scenarios of seed vigor were constrained. Integrated model parameters were calibrated and validated using data from experiments conducted during 2012 and 2015 and 2018 to 2019 in Gansu Province of Northwest China. The modeling results showed that although the highest grain yield of 685.1 g m(-2) was obtained for the planting density of 12.47 plants m(-2), seed vigor decreased by 20% (decreased kernel weight by 5.5%). Comparison with different scenarios, a planting density of 11.30 plants m(-2) was recommended, which increased grain yield by 5.7%, and ensured seed vigor by 90% (decreased kernel weight by 2.7%). To ensure sufficient irrigation in the median water year, the optimal irrigation depths for this planting density at the vegetative, flowering, and grain filling stages were 79.8, 140.0, and 145.3 mm, respectively, which reduced total irrigation depth by 27.0%. The integrated model is a useful tool to decrease irrigation amounts and increase yield of hybrid maize seeds in the arid areas of Northwest China.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000822000300001
WOS关键词	KERNEL NUMBER DETERMINATION ; FAO AQUACROP MODEL ; GRAIN-YIELD ; CROP COEFFICIENT ; HARVEST INDEX ; SPRING MAIZE ; ARID REGION ; WEIGHT ; PERFORMANCE ; GROWTH
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/2XILL650/393230
推荐引用方式 GB/T 7714	Shi, Rongchao,Tong, Ling,Du, Taisheng,et al. An integrated model to optimize planting density and sufficient irrigation depth for increasing hybrid maize seeds yield[J],2022,40(6):909-923.
APA	Shi, Rongchao.,Tong, Ling.,Du, Taisheng.,Shukla, Manoj Kumar.,Jiang, Xuelian.,...&Qin, Yonghui.(2022).An integrated model to optimize planting density and sufficient irrigation depth for increasing hybrid maize seeds yield.IRRIGATION SCIENCE,40(6),909-923.
MLA	Shi, Rongchao,et al."An integrated model to optimize planting density and sufficient irrigation depth for increasing hybrid maize seeds yield".IRRIGATION SCIENCE 40.6(2022):909-923.