干旱区生态环境知识资源中心(Arid): Estimating the upper and lower limits of kernel weight under different water regimes in hybrid maize seed production

Arid

DOI	10.1016/j.agwat.2018.09.014
	Estimating the upper and lower limits of kernel weight under different water regimes in hybrid maize seed production
	Wang, Jintao 1,2; Kang, Shaozhong 1; Du, Taisheng 1; Tong, Ling 1; Ding, Risheng 1; Li, Sien 1
通讯作者	Kang, Shaozhong
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2019
卷号	213 页码:128-134
英文摘要	In hybrid maize (Zea mays L.) seed production, both the kernel quality and the germination rate, which are positively related to kernel weight (KW), are very important. Water deficit can change the source-sink ratio (SSR) and thus affects KW. To create a water-saving irrigation program that facilitates the production of high-quality seed, it is necessary to properly model the KW-water relationship. Irrigation experiments were conducted in 2014 and 2015 in an arid region of Northwest China to investigate the effects of deficit irrigation on maize plant biomass and yield; and pollination experiments were conducted in 2016 to obtain a wide range of SSR and KW data. Analysis of the results showed that water deficit at the vegetative or flowering stages reduced post-flowering biomass gain (PBG) and kernel number (KN), thus significantly affecting SSR. At the grain-filling stage it reduced PBG but had no significant effect on KN, thus reducing SSR. Only the treatment of no irrigation in the grain-filling stage in 2015 significantly reduced KW. The Jensen model can accurately simulate the relationship between PBG and relative evapotranspiration at each growth stage. The water sensitivity index of PBG in the vegetative, flowering, grain-filling and ripening stages were respectively 0.48, 0.48, 0.97, and 0.16. Based on the experimental data of 2016, the hyperbolic upper (UpKW) and lower (LowKW) limit equations were created for KW as a function of SSR using boundary analysis. UpKW and LowKW increased as SSR increased, but the difference between UpKW and LowKW first increased and then decreased as SSR increased. When SSR was 0, UpKW was 178.39 mg and LowKW was 155.56 mg. When SSR is not less than 867.23 mg kernel(-1), UpKW and LowKW are both 326.97 mg, which is the potential KW. Combined with the KN-water model, the models developed in this study can be used to develop a water-saving and irrigation program that produces high-quality seed.
英文关键词	Kernel weight Source-sink ratio Post-flowering biomass gain Evapotranspiration Maize for seed production
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000457952700012
WOS关键词	BIOMASS ACCUMULATION ; GRAIN-YIELD ; DEFICIT ; GROWTH ; IRRIGATION ; SOIL ; DROUGHT ; PHOTOSYNTHESIS ; EVAPORATION ; COMPONENTS
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213996
作者单位	1.China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China; 2.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources, 286 Huaizhong Rd, Shijiazhuang 050021, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jintao,Kang, Shaozhong,Du, Taisheng,et al. Estimating the upper and lower limits of kernel weight under different water regimes in hybrid maize seed production[J]. 中国农业大学,2019,213:128-134.
APA	Wang, Jintao,Kang, Shaozhong,Du, Taisheng,Tong, Ling,Ding, Risheng,&Li, Sien.(2019).Estimating the upper and lower limits of kernel weight under different water regimes in hybrid maize seed production.AGRICULTURAL WATER MANAGEMENT,213,128-134.
MLA	Wang, Jintao,et al."Estimating the upper and lower limits of kernel weight under different water regimes in hybrid maize seed production".AGRICULTURAL WATER MANAGEMENT 213(2019):128-134.