Crop coefficient determination method and device

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

Active Publication Date: 2020-01-24
京蓝物联技术(北京)有限公司
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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 co

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  • Crop coefficient determination method and device
  • Crop coefficient determination method and device
  • Crop coefficient determination method and device

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[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 protection scope 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 th...

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Abstract

The invention discloses a crop coefficient determination method and device. The method comprises the following steps of: calibrating a soil moisture sensor to obtain the volumetric water content of each layer of soil; generating a soil moisture content accumulation curve corresponding to different layers of soil according to the change of the volume moisture content of each layer of soil along with time; analyzing the soil moisture content accumulation curve, and determining field water-holding capacity points corresponding to different layers of soil; selecting an interval for calculating a crop coefficient from the soil moisture content accumulation curve by taking the field water-holding capacity points as reference points; and calculating a crop coefficient according to the accumulatedchange data of the soil volumetric water content corresponding to the interval. According to the invention, the problems of the complex crop coefficient determination mode and the low reference are solved.

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...

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Application Information

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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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