A method and system for soilless cultivation of vegetables that can automatically regulate the salt content of the substrate

Abstract

The invention relates to a substrate salt content automatically adjusting soilless vegetable planting method. The method comprises collecting substrate water content data at a fixed time interval; determining whether substrate water content is lower than a water stress critical value, if so, performing irrigation through nutrient solution; estimating substrate salt content; determining whether the substrate salt content is higher than a salt damage critical value, if so, performing rinsing through the nutrient solution; repeating the above steps until the growing period ends. Meanwhile, the invention provides a substrate salt content automatically adjusting soilless vegetable planting system applying the method. The substrate salt content automatically adjusting soilless vegetable planting method and system achieves automatic adjustment of soilless planting substrate salt content, saves human resource costs and fund costs, ensures fine water and fertilizer supply of soilless planted crops, avoids salt damage to the crops, and meanwhile, reduces waste of the nutrient solution, maximizes the utilization rate of the nutrient solution and provides technical guarantee for high-quality and high-efficiency yield of the soilless planted crops.

Description

technical field [0001] The invention relates to the technical field of high-efficiency cultivation of vegetables, in particular to a method and system for soilless cultivation of vegetables that can automatically regulate the salt content of a matrix. Background technique [0002] Soilless substrate vegetable cultivation gets rid of the limitation of soil on the production of facility vegetables. Light materials such as rock wool, coconut peat, peat, and vermiculite are used as alternative soils to provide growth space for crop roots, and at the same time, suitable nutrient solutions are irrigated according to crop types. . Compared with soil cultivation, soilless substrate cultivation reduces water leakage and nutrient leaching. While improving water and fertilizer utilization efficiency, it reduces the harm of nitrogen and phosphorus nutrient leaching to water environmental pollution. Soilless substrate cultivation can regularly clean up the cultivation The medium is repl...

AI Technical Summary

Problems solved by technology

Since there is no sensor to directly measure the salt content of the substrate, the salt management decision of soilless substrate cultivation crops is mostly made by empirical management methods, that is, increasing the amount of nutrient solution irrigation at artificially set time intervals to wash out the residual salt in the substrate. The selection of cultivation medium, irrigation time and nutrient solution irrigation amount is determined by human experience, which has a certain degree of blindness. When the nutrient solution irrigation amount is greater than the actual demand, it will easily lead to waste of nutrient solution. Otherwise, the purpose of washing salt cannot be achieved. Crops still suffer from substrate salt buildup

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