A method for measuring tea leaf area index

By using optical measurement instruments in the measurement of tea leaf area index and combining the optimization of branch correction coefficient, the measurement error problem caused by branch ridge occlusion is solved, and the measurement accuracy of leaf area index of densely planted tea trees is improved.

CN118089600BActive Publication Date: 2024-12-31NANJING UNIV OF INFORMATION SCI & TECH
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Patent Information

Application Number
CN202410130344.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-31
Publication Date
2024-12-31
Estimated Expiration
2044-01-31

AI Technical Summary

Technical Problem

The existing method of measuring tea leaves area index has the problem of branch trunk occlusion, which leads to inaccurate measurement results. Especially in the case of intensive planting, the measurement accuracy is low and the scope of application is limited.

Method used

The leaf area index was measured in the preset experimental sample area by optical measurement instrument, and the measurement results were corrected by the pre-acquisition branch correction coefficient. The branch projection data and leaf area index of different experimental samples were fitted by linear regression method. True value, optimize branch correction coefficient to improve measurement accuracy.

Benefits of technology

The error caused by branches and trunk occlusion is effectively corrected and the measurement accuracy of the tea leaf area index is improved. Especially when shrub-type tea trees are densely planted, the optimized branch correction coefficient further improves the measurement accuracy.

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Abstract

The invention discloses a method for measuring the leaf area index of tea trees, which belongs to the field of agricultural remote sensing information technology. The method comprises: measuring the leaf area index of each preset measuring point using an optical measuring instrument in a pre-defined experimental sample area; calculating the average value of the leaf area index of each preset measuring point, and correcting the average value using a pre-acquired branch correction coefficient to obtain the leaf area index of the tea trees in the experimental sample area; wherein the branch correction coefficient is obtained by fitting the branch projection data of different experimental samples with the true value of the leaf area index. The method can correct the error of the tea leaf area index caused by the branch occlusion problem.
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