Variation in the response of maize (Zea mays L.) root-shoot growth and grain yield to tillage practices under various soil compactions
文献类型： 外文期刊
第一作者： Gao, Zhuohan
作者： Gao, Zhuohan;Wang, Xinbing;Ding, Zaisong;Liang, Lu;Liu, Zheng;Li, Congfeng;Zhao, Ming;Zhou, Baoyuan;Gao, Zhuohan;Wang, Zhigang;Zhen, Wenchao
作者机构：
关键词： Maize; Tillage; Soil bulk density; Root growth; Shoot growth; Grain yield
期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.4； 五年影响因子：6.6 ）
ISSN： 0378-4290
年卷期： 2025 年 333 卷
页码：
收录情况： SCI
摘要： Appropriate tillage practice is essential for improving the production of maize (Zea mays L.) under various levels of soil compaction. This study aimed to reveal the underlying process of different tillage practices regulating maize root-shoot growth and yield response to various compaction levels. A two-year field experiment was conducted with two soil compaction levels (light compaction-LC, 1.45 g cm-3; heavy compaction-HC, 1.60 g cm-3) and three tillage practices (no-tillage-NT, rotary tillage-RT, and sub-soiling tillage-ST). HC decreased maize yield by 4.7-24.1 % compared to LC across tillage and years, meanwhile RT and ST significantly increased maize yield compared to NT under various compaction conditions. RT reduced soil bulk density and increased total porosity in the 0-20 cm soil layer compared to NT, while ST also contributed the effects in the 20-40 cm soil layer. As a result, ST exhibited an obvious advantage over RT in improving root length, root dry weight, and root absorption capacity, as well as shoot growth indices, such as photosynthetic parameters, leaf area index, and dry matter accumulation under HC, while it had no advantage under LC. Moreover, the improvement in root growth indices by ST was greater than that of shoot growth, particularly under HC, leading to increased root/shoot ratio. We concluded that both RT and ST could mitigate maize yield reduction from compaction by improving soil properties and root-shoot growth, while the effects of ST were enhanced under heavy compaction.
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