玉米的遥感:植物生物刺激剂在三个发展阶段的应用的影响
A V Silva1, C M Silva2, J H B Silva1
1Universidade Federal da Paraíba, Areia, PB, Brasil.
Brazilian journal of biology = Revista brasleira de biologia
|September 11, 2024
概括
生物刺激剂,如木提取物和激素产品,可以提高玉米的产量. 无人机和植被指数,特别是SAVI,有助于优化应用时间和剂量,以提高作物生产率.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 遥感 遥感 遥感 遥感
背景情况:
- 玉米是全球重要的作物,巴西是主要生产国.
- 生物刺激剂提供了一种有希望的方法来提高作物产量和质量.
- 无人驾驶飞行器 (UAV) 提供了一种经济的方法来监测大面积的耕地.
研究的目的:
- 评估生物刺激剂的有效性和在玉米种植中最佳应用时间.
- 用光度数据确定最适合的植被指数来预测产量增加.
- 分析生物刺激剂应用与作物生产率之间的相关性.
主要方法:
- 使用DJI无人机与RGB摄像头进行空中图像采集.
- 使用Agisoft Photoscan®处理的图像生成了orthomosaics.
- 使用QGIS®生成植被指数地图 (NGRDI,EXG,SAVI,TGI,GLI,RI),并使用R软件分析与产量的相关性.
主要成果:
- 木提取物 (PE) 和荷尔蒙产品 (HP) 在不同季节显示出最佳的整体表现.
- 在干旱期间,HP在减轻水压方面最有效.
- 特定的应用时间 (V3阶段,种子应用) 和剂量 (PE剂量4,HP水平3.4) 显著影响了产量.
- SAVI (土壤调整植被指数) 是唯一一个显示出与玉米生产率有显著差异和相关性的指数.
结论:
- 生物刺激剂的应用,特别是PE和HP,可以显著提高玉米产量.
- 基于无人机的遥感,特别是使用SAVI指数,是优化生物刺激剂策略的宝贵工具.
- 根据作物阶段和环境条件量身定制应用时间和剂量对于最大限度地提高生产力至关重要.
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