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A Remote Sensing Evaluation Method for Crop Water Use Efficiency at Field Scale

An evaluation method and crop technology, which can be used in data processing applications, instruments, calculations, etc., and can solve the problems of insufficient regional application of field test research results.

Active Publication Date: 2022-03-08
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of insufficient regional application of field test research results in the prior art, and propose a remote sensing evaluation method for crop water use efficiency at the farmland scale, so as to realize the objective evaluation of the water use effect at the farmland scale from space

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  • A Remote Sensing Evaluation Method for Crop Water Use Efficiency at Field Scale
  • A Remote Sensing Evaluation Method for Crop Water Use Efficiency at Field Scale
  • A Remote Sensing Evaluation Method for Crop Water Use Efficiency at Field Scale

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Embodiment Construction

[0049] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments shown and described in the accompanying drawings are exemplary only, and are intended to illustrate the principles and spirit of the present invention, and not to limit the scope of the present invention.

[0050] The embodiment of the present invention provides a remote sensing evaluation method for crop water use efficiency at farmland scale, such as figure 1 As shown, the following steps S1-S4 are included:

[0051] S1. Obtain the evapotranspiration ET and the total primary productivity GPP during the whole growth period of crops in the study area.

[0052] Step S1 includes the following sub-steps S11 to S14:

[0053] S11. Acquire the spatial distribution grid data of crops in the study area, and determine the crop growth period.

[0054] S12. Download the MODIS MOD16A2HGF evapotranspiration ET pro...

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Abstract

The invention discloses a remote sensing evaluation method of crop water use efficiency at the farmland scale. Based on the evapotranspiration ET and the total primary productivity GPP of the whole growth period retrieved by remote sensing, combined with effective rainfall data, the water productivity WP of the crop is The main control indicators, through the establishment of crop water consumption-crop total primary productivity model and crop water consumption-water productivity model, determined the appropriate water consumption range for the whole growth period of crops, and finally established a field-scale crop water use efficiency remote sensing evaluation method. The invention effectively makes up for the deficiency of regionalized application of field test research results, and realizes the objective evaluation of the effect of water use on the farmland scale from space.

Description

technical field [0001] The invention belongs to the technical field of quantitative remote sensing applications, and particularly relates to the design of a remote sensing evaluation method for crop water use efficiency at a farmland scale. Background technique [0002] Agriculture belongs to the primary industry and is the basic industry that supports the construction and development of the national economy. Irrigation is a technical measure to supplement the water needed by crops, which ensures the normal growth of crops and achieves high and stable yields. Objective evaluation of crop water use efficiency is related to the repositioning of agricultural technology and water-saving irrigation measures, the protection of ecological environment and the realization of sustainable use of water resources. The traditional evaluation method is mainly based on the monitoring of typical areas, and there are limitations such as the inability to achieve macroscopic and large-scale eva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/02G06Q10/06
CPCG06Q50/02G06Q10/06393G06Q10/067
Inventor 付俊娥庞治国吕娟江威路京选杨昆李琳李小涛曲伟宋文龙冯天时覃湘栋
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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