Method for analyzing intercept ability of canopy on photosynthetic active radiation based on virtual plant

Abstract

The invention relates to a method for analyzing intercept ability of a canopy on photosynthetic active radiation based on a virtual plant. The method comprises the following steps of: building a fine three-dimensional model of a plant in a natural growth form, shaping and trimming the plant, forming fine three-dimensional models of the plant in different crown types; obtaining crown radiation intensity by adopting an astronomical parameter calculation method; respectively simulating direct solar radiation PAR (peer assessment rating) space distribution of the canopy and sky radiation PAR space distribution by adopting a ray tracing algorithm and a turtle shell algorithm; calculating a PAR value of each leaf, obtaining PAR space distribution of the canopy and mean PAR values at different moments; calculating net photosynthetic rates of different canopies by combining a photosynthesis model; repeatedly shaping and trimming, and analyzing the intercept ability of the canopy on the PAR from mean PAR value, PAR space distribution and mean net photosynthetic rate of the canopy at day scale. The method benefits to quantitative analysis on scientific rationality of plant crown types so as to achieve the purpose of scientifically and rationally shaping and trimming the plant or designing the plant.

Description

technical field [0001] The invention relates to the fields of agricultural informatization and modern agricultural technology, in particular to a method for analyzing the ability of canopies to intercept photosynthetically active radiation based on virtual plants. Background technique [0002] Plant pruning is a very important operation link in production cultivation and management. Integral pruning can make reasonable use of space, improve the ventilation, light transmission and stress resistance of the canopy, and ensure the healthy growth of plants. The ornamental tree shape with good posture can create a well-proportioned and natural garden landscape; pruning can adjust the nutritional elements in the plants to make them complete in variety and in appropriate proportions, so as to meet the needs of plant growth and improve the quantity and quality of flowers and fruits. Generally speaking, pruning runs through the whole process of plant growth. Therefore, the computer s...

AI Technical Summary

Problems solved by technology

The absorption of PAR by plants is related to the leaf area. The more leaves on the top of the canopy, the larger the area of ​​photosynthetically active radiation absorbed, and the greater the instantaneous energy of solar PAR intercepted by the canopy; The leaves inside the canopy form a shield, resulting in weak photosynthesis and strong respiration (energy consumption) of leaves inside the canopy, affecting plant growth and production

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