Method and device for determining irrigation parameters of crops

Abstract

The invention provides a method and device for determining irrigation parameters of crops. At least one irrigation parameter is determined according to the root system depth and the root system characteristics of the crops. The method comprises the following steps: determining root system length of the crops as the irrigation depth; dividing a soil layer of the crops as at least one layer of irrigation layer according to the irrigation depth; for each layer of irrigation layer, determining a water content lower limit value of the soil; for each layer of irrigation layer, determining a moisturechange rate according to the water content lower limit value of the layer of soil and the actual water content of the layer of the soil; taking a mean value of the moisture change rate; and determining whether needs to irrigate the crops according to the mean value. By considering the distribution characteristics that the crop root system is an inverted triangle structure from big to small, the water content states and changes of the soil at different depths are monitored, the water resource is reasonably utilized when the maximum irrigation amount to the crop root area is effectively and reasonably controlled, and the energy source is saved.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation, in particular to a method and device for determining irrigation parameters including irrigation date, irrigation water volume and irrigation duration based on variables of crop root system distribution. Background technique [0002] Irrigation is a technical measure to supplement the water needed by crops. In order to ensure the normal growth of crops and obtain high and stable yields, sufficient water must be supplied to crops. my country is one of the 13 most water-scarce countries in the world. The per capita water resources are about 2,200 cubic meters, which is only a quarter of the world average, and the temporal and spatial distribution of water resources is extremely uneven. my country's agriculture, which is a large water user, accounts for 62% of the total water consumption, but its water use efficiency is extremely low, only 0.48, which is far behind developed countries...

AI Technical Summary

Problems solved by technology

[0004] At present, although various irrigation technologies are being developed and improved day by day, but the irrigation parameters are determined according to the specific root depth and root characteristics of the crops, for example, the specific irrigation date, irrigation water volume or irrigation duration have not yet appeared in the industry.

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