Method and device for determining crop coefficient

A technology for crops and coefficients, applied in measuring devices, testing plants/trees, soil material testing, etc., can solve the problems of complex determination of crop coefficients and low reference, and achieve the effect of simple operation and high reference

Active Publication Date: 2022-04-05
京蓝物联技术(北京)有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The main purpose of this application is to provide a method and device for determining crop coefficients, so as to solve the problems of complex and low reference for determining crop coefficients

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  • Method and device for determining crop coefficient
  • Method and device for determining crop coefficient
  • Method and device for determining crop coefficient

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Embodiment Construction

[0051] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0052] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for...

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Abstract

The application discloses a method and a device for determining a crop coefficient. The method of this application includes obtaining the soil volumetric water content of each layer by calibrating the soil moisture sensor; generating the soil moisture content cumulative curve corresponding to different layers of soil according to the change of the soil volumetric water content of each layer with time; analyzing the soil moisture content cumulative curve, Determine the field water capacity points corresponding to different soil layers; use the field water capacity points as reference points to select the interval for calculating the crop coefficient from the soil moisture content accumulation curve; calculate according to the cumulative change data of the soil volume water content corresponding to the interval crop factor. This application solves the problems of complex determination methods of crop coefficients and low referentiality.

Description

technical field [0001] The present application relates to the technical field of irrigation, in particular, to a method and device for determining crop coefficients. Background technique [0002] Crop coefficient refers to the ratio of water demand to potential reference transpiration in different development stages of crops, which is usually expressed as Kc. The crop coefficient is obtained under specific environmental conditions and crops, and different environmental conditions or crops will cause changes in the crop coefficient. Crop coefficient is often used as a reference index for the design and management of farmland water conservancy projects. The existing method for determining the crop coefficient is to use a weighing lysimeter to measure the actual evapotranspiration of the farmland, and then calculate the crop coefficient based on this. In the actual implementation process, the inventors found that the way to determine the crop coefficient needs to select the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N33/24
CPCG01N33/0098G01N33/246G01N2033/245
Inventor 门旗王春香
Owner 京蓝物联技术(北京)有限公司
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