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Tillage practices affects the grain filling of inferior kernel of summer maize by regulating soil water content and photosynthetic capacity

文献类型： 外文期刊

作者： Zhai, Lichao 1 ; Wang, Zhanbiao 3 ; Song, Shijia 4 ; Zhang, Lihua 1 ; Zhang, Zhengbin 2 ; Jia, Xiuling 1 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, Key Lab Crop Cultivat Physiol & Green Prod Hebei, Sci Observing & Expt Stn Crop Cultivat North Chin, Inst Cereal & Oil Crops,Minist Agr, Shijiazhuang 050035, Hebei, Peoples R China

2.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources, Shijiazhuang 050021, Hebei, Peoples R China

3.Chinese Acad Agr Sci, Inst Cotton Res, State Key Lab Cotton Biol, Anyang 455000, Henan, Peoples R China

4.Hebei Acad Agr & Forestry Sci, Shijiazhuang 050031, Hebei, Peoples R China

关键词： Tillage practices; Summer maize; Grain filling; Inferior kernel; Soil water content, photosynthetic capacity

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：4.516； 五年影响因子：5.12 ）

ISSN： 0378-3774

年卷期： 2021 年 245 卷

页码：

收录情况： SCI

摘要： Poor grain filling of inferior kernel of summer maize is a major challenge restricting grain yield of summer maize, especially under higher plant densities. Much work so far has proved that tillage practices could regulate soil properties and grain yield of maize effectively. In order to explore the effect of tillage practice on grain filling of inferior kernel of summer maize, field experiments were conducted over two consecutive years (2016-2017), and three tillage practices (T1, no tillage; T2, no tillage with subsoiling; T3, deep horizontal rotary tillage) were assessed. The grain filling parameter showed that final grain weight (A), the time reaching the maximum grain filling rate (T-max), the dry matter accumulation under the maximum grain filling rate (W-max), the mean grain filling rate (G(mean)), and the active grain filling period (D) of T2 were usually higher than that of T1 and T3, and significant difference was observed between T2 and T1. Compared with T1, T2 and T3 reduced the soil bulk density and increased the soil porosity, and significantly increased the root dry matter accumulation in the 0-40 cm soil profile by 13.4% and 28.7%, respectively. Soil water content decreased among tillage practices in the order T2 > T1 > T3. However, T2 and T3 increased the water consumption, compared to that of T1. Moreover, T2 and T3 increased post-anthesis photosynthetic capacity, including the photosynthetic rate, leaf area duration, and chlorophyll content, and further improved the post-antheisis and total dry matter accumulation. The enzyme activities of SuSase, StSase, and ADPG-PPase of inferior and superior kernel in T2 and T3 were also higher than that of T1. In conclusion, the present results indicate that subsoiling could promote the grain filling of inferior kernel of summer maize by regulating soil water content, soil water consumption, and photosynthetic capacity.

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