Method and system for diagnosing plant water stress based on high-flux stomatal conductance

Abstract

The invention discloses a method and system for diagnosing plant water stress based on high-flux stomatal conductance, and belongs to the technical field of agricultural irrigation. A plant water stress diagnosis system consisting of high-flux stem flow, meteorological data, net radiation measurement equipment and plant height leaf area parameter auxiliary measurement is combined with a P-M formula to continuously output high-flux stomatal conductance, so that a water stress index is calculated by utilizing the stomatal conductance; and the long-time, accurate, high-pass and continuous monitoring, quantification and diagnosis of plant water stress are realized; a reference plant growing under the condition of no water stress is placed in the same growth climate environment as a plant to be detected, and according to the characteristic that the stomatal conductance of the plant is very sensitive to the water stress, the invention provides an index for diagnosing the water stress of the plant. The index can be obtained by calculating the stem flow, net radiation and meteorological data of the to-be-measured plant and the reference plant which are automatically measured in a high-flux manner, so that the high-flux quantification and diagnosis of the water stress degree of the to-be-measured plant are realized. The method comprehensively considers plant physiological response and environmental influence, and has the characteristics of physiological basis, reliable data, long-time accuracy and high-pass continuity in the application of diagnosing plant water stress.

Description

technical field [0001] The invention belongs to the technical field of agricultural irrigation, and in particular relates to a method and system for diagnosing plant water stress based on high-throughput stomatal conductance. Background technique: [0002] In recent years, with the diversion of agricultural water by other industries, the proportion of agricultural irrigation water consumption has gradually declined. Regulated Deficit Irrigation (RDI) mode is widely used in the situation of uncertain water supply and decreasing irrigation water consumption. Some scholars pointed out that regulated deficit irrigation may be a way to achieve higher water productivity (that is, the output per unit of water consumption), which can save water while ensuring stable production. The core idea of ​​regulated deficit irrigation is precise and differentiated irrigation for the entire growth period of crops. This irrigation mode applies a certain degree of beneficial water deficit durin...

AI Technical Summary

Problems solved by technology

However, the existing stomatal conductance measurement methods are generally based on photosynthetic instrument and stomatometer measurement, which requires the measurement of plant leaves one by one, which is time-consuming and laborious, and due to the differences in the physiological state of the leaves themselves, the point values ​​measured one by one are prone to large error, it is difficult to continuously and accurately reflect the degree of stress suffered by plants, so it is difficult to be widely used in production practice

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