Impacts of Soil Moisture on Crop Health: A Remote Sensing Perspective
Impacts of Soil Moisture on Crop Health: A Remote Sensing Perspective
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土壤湿度对作物健康的影响：遥感视角
DOI：
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发表时间：
2021
期刊：
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通讯作者：
Li Lin
中科院分区：
文献类型：
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作者：
Haoteng Zhao;L. Di;Ziheng Sun;Pengyu Hao;E. Yu;Chen Zhang;Li Lin
监测土壤水分对作物健康的影响对于灌溉决策支持、粮食安全、精准农业以及更广泛地了解水和碳循环之间的关系等应用非常重要。在这项研究中，我们研究了土壤水分和作物健康指标之间的关系，以及它们如何在从几天到几周的时间尺度上相互响应。考虑的卫星植被指数(NDVI)是由可见光和近红外(NIR)中宽(20-40 nm)波段的反射率和从土壤水分主动被动(SMAP)任务延伸到大约1m深度的土壤水分产品获得的归一化差异植被指数(NDVI)。我们发现NDVI与内布拉斯加州农田的土壤水分有显著的相关性。作物类型和土壤类型也以不同的速率和强度影响作物健康与土壤水分变化的相关性。
Monitoring the effects of soil moisture on crop health is important for applications such as irrigation decision support, food security, precision agriculture as well as for more broadly understanding relationships between water and carbon cycles. In this study, we examine the relationships between soil moisture and crop health indicators, how they respond to each other on timescales from days to weeks. The satellite-derived indicators considered are the normalized difference vegetation index (NDVI) derived from reflectance obtained with moderately wide (20-40 nm) spectral bands in the visible and near-infrared (NIR) and soil moisture products that extends to about 1 m depth from Soil Moisture Active Passive (SMAP) mission. We find that NDVI have significant correlations with soil moisture in crop fields of Nebraska. Crop types and soil types also greatly influence the correlation between crop health and soil moisture changes at various rates and strength.