Variation in the response of maize (Zea mays L.) root-shoot growth and grain yield to tillage practices under various soil compactions

IF 6.4 1区农林科学 Q1 AGRONOMY

Field Crops Research Pub Date : 2025-07-28 DOI:10.1016/j.fcr.2025.110082

Zhuohan Gao , Xinbing Wang , Zhigang Wang , Zaisong Ding , Lu Liang , Wenchao Zhen , Zheng Liu , Congfeng Li , Ming Zhao , Baoyuan Zhou

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引用次数: 0

Abstract

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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不同土壤压实条件下玉米根冠生长和产量对耕作方式的响应变化

在不同土壤压实程度下，适宜的耕作方式对提高玉米产量至关重要。本研究旨在揭示不同耕作方式对不同压实水平下玉米根冠生长和产量响应的潜在调控过程。为期两年的田间试验采用两种土壤压实水平(轻压实- LC， 1.45 g cm−3；重压实- HC， 1.60 g cm−3)和三种耕作方法（免耕- NT，旋转式耕作- RT和深耕- ST）。不同耕作方式和年份下，旱作玉米产量比旱作玉米减产4.7% - 24.1% %，而在不同压实条件下，旱作和旱作玉米产量均显著高于旱作。与NT相比，RT降低了0-20 cm土层的土壤容重，增加了总孔隙度，而ST对20-40 cm土层也有影响。结果表明，在高温处理下，ST处理在提高根长、根干重、根吸收能力以及光合参数、叶面积指数、干物质积累等地上部生长指标上均优于RT处理，而在低温处理下则无明显优势。此外，施冷处理对根系生长指标的改善大于对茎部生长的改善，特别是在高温胁迫下，导致根冠比增加。结果表明，RT和ST均能通过改善土壤性质和根冠生长来缓解压实导致的玉米减产，而在重度压实条件下，ST的效果更明显。

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来源期刊

Field Crops Research 农林科学-农艺学

CiteScore

9.60

自引率

12.10%

发文量

307

审稿时长

46 days

期刊介绍： Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.