Crop evapotranspiration automatic recording negative head fluid feeding system and method

Abstract

The invention relates to the technical field of agricultural cultivation and irrigation, and in particular relates to a crop evapotranspiration automatic recording negative head fluid feeding system and a method. The system comprises a water source, a liquid level detection device and a negative head device. The liquid level detection device comprises a monitor bucket, a controller and a liquid level sensor, and the monitor bucket is connected with the water source; the liquid level sensor is arranged inside the monitor bucket and the controller is electrically connected with the liquid level sensor; the negative head device comprises a liquid level constant bucket, a pressure control pipe, a gas collecting bottle, a fluid feeding pipeline and a plurality of ceramic disks. The liquid level constant bucket is connected with the monitor bucket, one end of the pressure control pipe is connected with the liquid level constant bucket, the other end of the pressure control pipe is connected with the gas collecting bottle, and the gas collecting bottle is connected with the plurality of ceramic disks through the fluid feeding pipeline. According to the crop evapotranspiration automatic recording negative head fluid feeding system and the method, automatic detection, calculation and save on the crop evapotranspiration are achieved, and labor intensity and data error caused by human factors are decreased greatly.

Description

technical field [0001] The invention relates to the technical field of agricultural cultivation and irrigation, in particular to a negative head liquid supply system and method for self-recording crop evapotranspiration. Background technique [0002] Crop evapotranspiration, also known as crop water demand, mainly includes plant transpiration and inter-plant evaporation, which is the most important part of water consumption in agricultural production. Crop evapotranspiration is not only an important component in water balance, but also an indispensable link in the water cycle process and an effective theoretical basis for water management. Therefore, accurate determination of crop evapotranspiration is of great significance in reducing water consumption during crop growth, improving water use efficiency, and developing water-saving agricultural irrigation technology. [0003] In the current research, the methods for measuring and estimating crop evapotranspiration mainly in...

AI Technical Summary

Problems solved by technology

However, in the past, the mode of measuring crop evapotranspiration using negative water head was mostly carried out in pot experiments, which is very different from the crop evapotranspiration under actual field cultivation conditions.

In addition, although the negative head irrigation system realizes the automatic liquid supply process to the crops, the monitoring of the liquid level changes of the storage tanks (pipes) still requires manual participation to obtain the evapotranspiration of the crops.

The whole process not only needs to read the liquid level regularly and at fixed points, but also participates in the calculation of the liquid consumption volume, which is labor-intensive and time-consuming, and the accuracy is poor.

Images