Crop moisture stress index determination device and its determination method

Abstract

The invention provides a crops water forcing index determining device and method. The determining device includes: data collecting and processing units, composed of a data collecting probe and of data collector and calculating unit, respectively and connected with each other; the data collecting probe includes infrared temperature measuring probe, ventilated psychrometer, solar net radiation meter, and wind velocity indicator. It also includes application of determining method in determining crops water forcing index. The monitoring station can be set in any position in the farm, enhancing working efficiency, making it unnecessary bury the system underground, providing convenient condition for agricultural mechanical labor. The system applies CWSI theoretical mode to diagnose water forcing and form an irrigating policy, enhancing diagnosis precision, able to largely reduce the waste in water resource and enhancing the utilization ratio of irrigating water resource.

Description

Technical field: [0001] The invention relates to an agricultural irrigation system, in particular to a device and a measurement method for implementing detection, data processing, and irrigation decision-making by using a crop water stress index CWSI theoretical model. Background technique: [0002] In the prior art, the decision-making system for agricultural irrigation generally selects soil moisture as the control parameter, and is equipped with related calculation methods. However, the system that selects soil moisture as the control parameter has the following disadvantages: First, due to the large heterogeneity of soil moisture in the field soil, soil moisture is selected as the control parameter, which means that a certain number of soil moisture probes must be installed to achieve Guarantee that the measurement of the measurement system is representative, but it is unrealistic to deploy more soil moisture probes in the field or often enter the center of the field for...

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Problems solved by technology

[0018] In order to solve the problem that soil moisture is generally selected as the control parameter in the agricultural irrigation decision-making system in the prior art, the measurement points brought about are not universal, the monitoring stations are difficult to select, the labor intensity of the operators is high, and the monitoring equipment buried in the soil is not conducive to agriculture. Mechanical work etc.

At the same time, the present invention also needs to solve the problems in the prior art that the utilization rate of water resources in agricultural irrigation is not high due to the application of the CWSI empirical model to evaluate the level of crop water stress index, and it is not suitable for agricultural areas in North China.

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