Measurement and evaluation method of spatial fog droplet deposition based on plant canopy porosity

Abstract

The invention relates to a method for measuring and evaluating the amount of droplet deposition in space based on the porosity of the plant canopy. The plant canopy is divided into several layers, and partitions are placed at the intervals between the layers. The partitions are uniform and as close as possible. Place water-sensitive paper in as many places as possible, pass the plants at a constant speed through the spray frame with constant flow, and statistically analyze the deposition data of water-sensitive paper to obtain the deposition amount per unit area of ​​fog droplets, which is multiplied by the area of ​​the partition to obtain the n-th layer partition. The total amount of plate deposition, that is, the penetration amount of the nth layer of the plant canopy, the difference between the deposition amount of the n-1th layer of the partition and the nth layer of the partition is the deposition of the nth layer of the plant canopy, reflecting The deposition status of the fog droplets in the n-layer plant canopy, the percentage of the total amount of partition deposition in the n-th layer to the total deposition of the n-1 layer reflects the penetration status of the fog droplets in the plant canopy, using The relationship between the porosity of each layer and the deposition percentage was obtained by Gaussian process regression, which can provide an important basis for the study of droplet penetration and deposition distribution inside the plant canopy.

Description

technical field [0001] The invention belongs to the technical field of plant protection spraying, and relates to a method for measuring and evaluating the deposition amount of space droplets based on the porosity of a plant canopy, and an evaluation method for the corresponding relationship between the porosity and the deposition amount. [0002] technical background [0003] For the measurement of spray deposition on the plant canopy, Khot et al. proposed to arrange water-sensitive paper on the leaves of the plant canopy. This method usually requires parameter values ​​such as leaf area index to calculate, but the shape of the plant canopy is variable. The measurement of leaf area index is difficult, and the desired result cannot be obtained. After searching the existing technical literature, it is found that the invention patent "Size-Variable Droplet Space Deposition Test Device and Method", patent application number 201310410038.1 discloses a size-variable space test devi...

AI Technical Summary

Problems solved by technology

These simplified models can replace plants to measure the amount of deposition to a certain extent, but the internal structure of the plant canopy is complex and changeable, and there are mutual shading effects between plants, so the deposition results cannot be obtained accurately by using these methods

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