Irrigation Water Management: Irrigation Water Needs-Post-translation Thoughts

Irrigation Water Management: Irrigation Water Needs

Most of the FAO's "Irrigation Management: Irrigation Water Needs" series of articles has been translated and the work has come to an end. Through this translation, I have a deeper understanding of crop water requirements and irrigation water requirements.

I am very pleased to be able to work through the translation of the article and read the original text repeatedly, especially to understand the contributions made by the scientists of the United Nations Food and Agriculture Organization.

Overall, scientists at the Food and Agriculture Organization （FAO）of the United Nations have done pioneering work in crop irrigation research. However, due to the constraints of the scientific and technological means at that time and the level of IT information technology at that time, although it has been pointed out that there are two methods for analyzing and calculating crop water requirements, one is the single-crop coefficient method, and the other is the dual-crop coefficient method, and it is pointed out that the dual-crop coefficient method , mostly used in the calculation of real-time crop water requirements in irrigation management. However, it did not reveal the connotation of crop water demand in depth, nor did it point out how to reveal the mechanism and main secrets of crop water demand that changes with the development of growth stages according to the state of crops in irrigation management.

Today, with the great development of big data and smart agriculture, we have the ability and the opportunity to break through the generalized calculation formula of the United Nations Food and Agriculture Organization when calculating crop water requirements at that time, adopt the crop digital growth model, and continuously correct the model, Refinement technology to achieve more accurate calculation and give powerful ability to predict crop water demand.

The best summary of the calculation and analysis of crop water demand is to improve and improve the real-time simulation calculation technology of crop water demand by inheriting and exerting this model of the relationship between energy and crop water demand, and using the existing big data technology and image recognition technology. It is very important to solve the decision-making logic and production mechanism of crop water demand.

It is undeniable that the calculation of irrigation water demand or irrigation decisions must be based on these three factors. The first is weather forecast. Many people have explored in this regard, trying to make irrigation decisions by accurately predicting weather and rainfall. Thereby reducing irrigation water consumption and achieving the purpose of saving water. The second type is soil moisture content. Many equipment manufacturers continue to try to accurately collect soil moisture data through soil sensors to accurately grasp the spatial and temporal dynamic distribution of soil moisture in the soil layer, so as to achieve accurate fertilization. irrigation. The third type is crops. Mathematical models of crops should play an important role in crop irrigation decision-making. Unfortunately, the current research on crop growth simulation is still in its infancy. The FAO article only provides a generalized analysis of crop water requirements. And qualitative explanation, only a summary explanation, how to continuously and accurately quantitatively analyze and calculate the changing water demand of crops in each growing period under the influence of environmental meteorological factors during the growing period of crops, is not completely in the " Irrigation Management: Irrigation Water Requirements.

The paper also proposes the use of the dual crop coefficient method to calculate crop water requirements to analyze the basis for irrigation system management and real-time irrigation scheduling decisions, but it has not yet involved the state influencing factors of crop growth, such as LAI's influencing factors on water demand.

For the Chinese translation, please search and visit the WeChat public account "Irrigation Knowledge Circle".

The original (English) download address, click here!