Precise irrigation control method for greenhouse organic substrate cultivated tomatoes

Abstract

The invention relates to a precise irrigation control method for greenhouse organic substrate cultivated tomatoes. The method comprises the following steps that 1), whether the current hourly moment of the day is within an effective time period of irrigation amount estimation or not is judged; 2), in the effective time period of irrigation amount estimation, time when radiation is accumulated to athreshold value is acquired, whether the time meets an hour duration constraint condition or not is judged, and otherwise, meteorological data per hour in a time interval meeting an irrigation triggering condition at the next hourly moment are acquired; 3), tomato growth parameters and an irrigation model weight coefficient are determined according to the date of the day, a small-time-scale transpiration-radiation comprehensive irrigation model which can be used for predicting the tomato irrigation water demand in a short period is constructed, and the irrigation amount per hour in a time period meeting the irrigation triggering condition is estimated; and 4), irrigation triggering time and irrigation amount information are sent to irrigation equipment to execute irrigation. Compared withthe prior art, according to the precise irrigation control method for the greenhouse organic substrate cultivated tomatoes, a user does not need to manually start the irrigation equipment and set theirrigation amount each time according to experience, and the irrigation equipment can be automatically started to implement irrigation.

Description

technical field [0001] The invention relates to the technical field of crop irrigation prediction and control implementation in industrial greenhouses, in particular to a precision irrigation control method for growing tomatoes on organic substrates in greenhouses. Background technique [0002] Irrigation, as the only way to supply water for tomato cultivation in organic substrates in greenhouses, is crucial to maintaining normal growth of tomatoes and ensuring high-quality and high-yield. The automatic control of greenhouse tomato precise irrigation is based on comprehensive consideration of changes in the greenhouse microclimate environment and real-time growth of crops. Realize the short-term prediction of irrigation water demand of greenhouse tomato and the implementation of irrigation automatic control. From the perspective of the entire greenhouse crop production process, too little water supply will cause water stress in the root system of the crop, and too much water...

AI Technical Summary

Problems solved by technology

In practical applications, planters need to adjust the timing, radiation and transpiration control thresholds according to different meteorological environments and growth stages, which has high requirements for operators and is not conducive to large-scale promotion and use.

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