Dual Benefits in Yield Enhancement and Grain Desiccation: Irrigation Coupled with Husk Removal Modulates Grain Moisture Dynamics in Maize
文献类型： 外文期刊
作者： Gao, Jia 1 ; Fa, Keyu 1 ; Huang, Shoubing 3 ; Wang, Pu 3 ; Liu, Zheng 1 ;
作者机构： 1.China Agr Univ, State Key Lab Efficient Utilizat Agr Water Resourc, Beijing 100083, Peoples R China
2.Natl Field Sci Observat & Res Stn Efficient Water, Wuwei 733009, Peoples R China
3.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China
4.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China
5.Minist Agr & Rural Affairs, Key Lab Crop Physiol & Ecol, Beijing 100081, Peoples R China
关键词： maize; irrigation; husk; grain water content; grain filling; critical period; dynamic analysis
期刊名称：WATER （ 影响因子：3.0； 五年影响因子：3.3 ）
ISSN：
年卷期： 2025 年 17 卷 13 期
页码：
收录情况： SCI
摘要： Grain moisture influences grain number formation during the critical period as well as determining the final grain weight during the grain-filling period in maize (Zea mays L.). To clarify the relationships between grain number, grain weight, and grain moisture dynamics, a 2-year field experiment in a split-plot design was conducted with two irrigation treatments, well irrigation (WI) and no irrigation (NI), and with four husk removal treatments, including no husk removal as control (H0) and removal of 1/4 (H1/4), 2/4 (H2/4), 3/4 (H3/4), and 4/4 (H4/4) of the husk layers, respectively. Husk removal reduced the maize grain number, grain dry weight, and yield, and the reductions were larger under no irrigation (33.4-33.5%) than under well irrigation conditions (27.7-33.2%). By contrast, irrigation increased grain water content by 11.1-13.4% and grain dry weight by 6.5-10.4%, regardless of husk removal. Meanwhile, the interactive effects between irrigation and husk removal were significant in grain water content but not in grain yield, reflecting the larger negative effects of husk removal on maize grain yield. In conclusion, husk plays a crucial role in grain number formation during the critical period and grain weight during the grain-filling period, especially in drought conditions, in relation to the trade-offs between yield enhancement and grain desiccation in maize production.
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