水联结对夏季玉米在不同生长阶段的根分布和产量的影响
Yanbin Li1, Qian Wang1, Shikai Gao1
1School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China.
Plants (Basel, Switzerland)
|May 14, 2025
概括
优化水和是玉米生产的关键. 平衡的应用 (N2) 改善了根生长和产量,而不平衡的应用 (N1,N3) 损害了开发和作物产量.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 土壤科学 土壤科学
背景情况:
- 水和对于作物生长和产量至关重要.
- 了解它们的相互作用对于可持续农业至关重要,特别是在像黄河流域这样的地区.
- 玉米 (海605) 是一个易受水和压力的关键作物.
研究的目的:
- 研究水和对土壤水,动态和玉米根分布的结合作用.
- 分析土壤水,运输,根特征和作物产量之间的相互作用.
- 为优化玉米生产中的水和管理提供理论基础.
主要方法:
- 在中度干旱压力下进行实地实验 (50-60%的田间容量).
- 在玉米的两个关键生长阶段 (P1:结合,P2:丝-丝) 应用了三种剂量 (N1,N2,N3).
- 分析根形态,吸水,动态和作物产量;进行相关性分析.
主要成果:
- 玉米根形态遵循N2 > N1 > N3的趋势;与N2相比,N1和N3显著减少了根参数.
- 2处理最大限度地增加了水的吸收,并实现了最高的产量 (13,336 kg·ha-1).
- 在结合阶段 (P1) 的干旱压力比在丝阶段 (P2) 更严重地抑制了根部的发育.
- 观察到一种双向的适应策略:在水应力下更深的根,在不平衡下更宽的根.
- 土壤营养含量与产量有正相关,而根特征与产量有显著的负相关.
结论:
- 适当的水管理显著提高了根生长和玉米产量.
- 优化的水策略可以减轻泄漏风险.
- 这些发现支持量身定制的水和管理,以改善黄河流域的玉米生产.
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