在雨水和灌条件下精确管理玉米作物的SPAD动态
K Shivashankar1, M P Potdar1, Sandeep Gawdiya2
1Department of Agronomy, College of Agriculture, UAS, Dharwad, 580005, India.
Scientific reports
|July 2, 2025
概括
使用SPAD计量器实时监测叶绿素含量,有助于优化玉米中管理. 灌作物产量更高,精确的应用显著提高了玉米谷物产量.
科学领域:
- 农业科学 农业科学
- 植物生理学作物生理学
- 精准农业 精准农业 精准农业
背景情况:
- 实时监测树冠中叶绿素含量对于作物生长评估和精准农业至关重要.
- SPAD叶绿素计是评估玉米 (Zea mays L.) 中的状态的一个关键工具.
- 有效的管理对于最大限度地提高玉米产量至关重要,尤其是在各种水条件下.
研究的目的:
- 研究SPAD读数的时空动态及其与玉米产量的关系.
- 在雨水和灌条件下比较玉米产量和SPAD动态.
- 评估精确管理实践的有效性.
主要方法:
- 进行了一项为期两年的线条图案研究 (2020-2021年).
- 应用了八种精确管理策略,包括SPAD和绿色寻求者方法.
- 在雨水 (M1) 和灌 (M2) 条件下监测玉米产量和SPAD读数.
主要成果:
- 灌玉米的产量明显高 (6347公斤/公),高于雨水玉米 (5262公斤/公).
- 最佳的应用 (96-100%的充足度指数) 导致了最高的产量 (9508.2公斤/ha-1).
- 观察到SPAD值和谷物产量之间存在很强的相关性,特别是在繁殖阶段 (VT,R4).
结论:
- 基于SPAD的管理提高了玉米产量和资源使用效率.
- 实时监控工具对于优化作物管理至关重要.
- 识别管理的关键生长阶段是最大化产量潜力的关键.
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