US 12,402,579 B2
Crop irrigation method and apparatus based on salt leaching fraction, device and storage medium
Ting Yang, Guangzhou (CN); Xin Lan, Guangzhou (CN); and Junxiang Huang, Guangzhou (CN)
Assigned to Guangzhou Institute of Geography, Guangdong Academy of Sciences, Guangzhou (CN)
Filed by Guangzhou Institute of Geography, Guangdong Academy of Sciences, Guangzhou (CN)
Filed on Jul. 20, 2022, as Appl. No. 17/813,752.
Claims priority of application No. 202210225339.6 (CN), filed on Mar. 7, 2022.
Prior Publication US 2023/0276754 A1, Sep. 7, 2023
Int. Cl. A01G 25/16 (2006.01); A01G 25/02 (2006.01); G06Q 50/02 (2024.01)
CPC A01G 25/16 (2013.01) [A01G 25/02 (2013.01); G06Q 50/02 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A crop irrigation method based on a salt leaching fraction, comprising:
acquiring information data of crops in a target area, wherein the information data comprises location information data, root range data and a salt tolerance threshold;
acquiring a soil unsaturated hydraulic conductivity and a root water absorption rate of the crops in the target area, and acquiring a simulated soil water content in the target area according to the soil unsaturated hydraulic conductivity, the root water absorption rate, the location information data and a water movement algorithm in the numerical model of soil fluid, wherein the water movement algorithm is:

OG Complex Work Unit Math
wherein θ is the soil water content, x is plane coordinate data in the location information data, z is longitudinal coordinate data in the location information data, K(h) is the soil unsaturated hydraulic conductivity, and S(h) is the root water absorption rate;
acquiring a water flow rate in the target area, and acquiring the simulated soil salt content in the target area according to the simulated soil water content, the water flow rate, the location information data and a salt movement algorithm in the numerical model of soil fluid in the target area, wherein the salt movement algorithm is:

OG Complex Work Unit Math
wherein ECw is the electricity conductivity of soil water, t is a water flow time, λ is a preset water flow dispersity, and g is the water flow rate;
acquiring a salt leaching fraction of the crops in the target area according to the salt tolerance threshold of the crops, the simulated soil salt content and a calculating algorithm of the salt leaching fraction;
acquiring a water demand of the crops in the target area, acquiring an irrigation amount of the crops in the target area according to the water demand of the crops in the target area, the salt leaching fraction and a calculating algorithm of the irrigation amount, generating a water storage instruction according to the irrigation amount of the crops in the target area, and sending the water storage instruction to an irrigation apparatus; and
acquiring a real soil water content and a real soil salt content associated with the root range data of the crops, and controlling the irrigation apparatus to perform irrigation and drainage operations according to the real soil water content, the real soil salt content and preset demand thresholds of all growth periods of the crops, wherein the demand thresholds comprise a water demand threshold and a salt demand threshold.