使用微观卫星数据来估计小农系统中现场收益率差距及其驱动因素的持续性
Ambica Paliwal1,2, Balwinder-Singh3,4, Shishpal Poonia3
1School for Environment and Sustainability, University of Michigan, Ann Arbor, MI, 48109, USA. ambica@umich.edu.
Scientific reports
|July 10, 2023
概括
小农面临着巨大的产量差距,但很少有人随着时间的推移而持久. 优化播种日期和灌可以显著提高作物产量和粮食安全.
科学领域:
- 农业科学 农业科学
- 遥感 遥感 遥感 遥感
- 粮食安全 粮食安全
背景情况:
- 全球日益增长的粮食需求需要提高作物产量,特别是在产量差异很大的小农系统.
- 对有效的农业干预来说,量化产量差距,它们的时间持久性以及规模的潜在驱动因素至关重要.
研究的目的:
- 用微观卫星数据绘制2014-2018年印度比哈尔的田间农作物产量图.
- 评估景观规模的产量差距的大小,持久性和驱动因素.
- 模拟改进管理策略对缩小收益率差距的潜在影响.
主要方法:
- 利用微卫星数据生成现场水平的产量地图.
- 分析了跨时空尺度的收益率数据,以确定收益率差距特征.
- 采用统计分析来确定影响收益差异变化的因素.
主要成果:
- 整体收益率差距很大,平均占平均收益率的33%.
- 只有17%的观察到的收益差距在整个研究期间表现出持久性.
- 播种日期,地块面积和天气是产量差异变化的关键驱动因素,早期播种与更高的产量有关.
结论:
- 微卫星数据为了解小农农业系统的产量差距及其驱动因素提供了强大的工具.
- 提前播种和增加灌被确定为关键的管理策略,以显著减少产量差距.
- 结果为全球小农系统的农业生产增强提供了见解,以提高粮食安全.
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