Design And Implementation Of Integrated Monitoring Platform For Fertigation In Orchard

In recent years,with the expansion of the planting area of rural orchards in China,traditional artificial irrigation and fertilization have caused serious waste of water resources and fertilizers.Therefore,improving the utilization of water and fertilizer in orchards not only protects the environment,but also is the only way for modern agriculture.In view of the problems of excessive use of water and fertilizer in traditional orchards,this paper draws on the integrated control technology of water and fertilizer at home and abroad,combined with local environmental factors such as fruit trees and soil,designed a set of integrated monitoring platform for fertigation in orchard,and realized remote monitoring of fertigation equipment in the orchard;In the orchard irrigation decision-making model,the different types of soil parameters and the meteorological information collected in the orchard are used to model the evapotranspiration of the fruit trees to control the water and fertilizer equipment in the orchard,so as to achieve fine irrigation of the fruit trees.The main research contents of the thesis are:(1)The design of the integrated monitoring platform for fertigation in the orchard.The platform integrates the orchard environmental information collection system and the water and fertilizer integrated hardware control system.Among them,the orchard environmental information collection system mainly collects meteorological information of the orchard and uploads it to the server where the system is located through the gateway node;the integrated water and fertilizer hardware system mainly installs electromagnetic valves,sensors and other equipment in the water and fertilizer integrated field equipment.And upload it to the cloud platform in real time.The user can control the water and fertilizer field equipment and the operation status of the field equipment through the platform.(2)Development of a monitoring software system based on WEB.The system is developed by C# programming language,adopts WebSocket and data storage technology,etc.After the development of the system is completed,it is deployed in Alibaba Cloud server to realize remote monitoring of on-site water and fertilizer equipment by users.The user sends control commands to the programmable logic controller(PLC)in the water and fertilizer integrated field control system through the cloud platform control page to control the operation of the water and fertilizer integrated equipment.(3)Orchard water and fertilizer integrated irrigation model and irrigation amount research.The principal component analysis algorithm(PCA)and BP neural network were used to model the meteorological factors collected by the orchard weather station to predict the evapotranspiration of the fruit trees.Finally,by comparing the effects of the two prediction models,the model with the highest accuracy was selected as the orchard.Irrigation model.The model predicts the evapotranspiration of fruit trees,and calculates the water requirement of fruit trees in orchards according to the soil water content required for different growth stages of fruit trees,so as to achieve fine and quantitative irrigation of orchard crops.