A rapid and non-destructive method for measuring cotton leaf area index

A technology of leaf area index and measurement method, applied in the agricultural field, can solve the problem that the leaf area index measurement method cannot meet the requirements of fast and non-destructive
CN104236486BInactive Publication Date: 2017-06-13INST OF COTTON RES CHINESE ACAD OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF COTTON RES CHINESE ACAD OF AGRI SCI
Publication Date
2017-06-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a rapid lossless measuring method for a cotton leaf area index. The rapid lossless measuring method includes calculating the leaf area index according to combination of cotton canopy transmission and blade scattering, and correcting the leaf area index by a correction model to acquire the corrected leaf area index. The correction model is LAI=0.84*LAIAccuPAR+0.0879, the LAI refers to the corrected leaf area index, and the LAIAccuPAR refers to the leaf area index acquired by calculation before correction. A conventional destructive direct measuring method is replaced by the indirect measuring method, the leaf area index acquired by calculation according to the combination of cotton canopy transmission and blade scattering is corrected by the correction model, and the real leaf area index of cotton groups in the field is figured out through back calculation. The method can be used for rapidly and effectively estimating a real value of the leaf area index of the cotton groups in the field without losses, estimating and judging the growth trend of the cotton groups and applying corresponding planting measures for field management.
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Description

technical field

[0001] The invention relates to the field of agricultural technology, in particular to a method for quickly and nondestructively measuring cotton leaf area index. Background technique

[0002] Leaf is an important organ for photosynthesis and synthesis of organic matter in cotton. Leaf Area Index (LAI) is an important indicator for judging the growth and development of field cotton, and directly affects cotton yield and fiber quality to a certain extent. The leaf area index is also an important parameter to characterize the cotton canopy structure and judge the growth of cotton, and it is also a key factor to determine the biomass and final yield of cotton. Leaf area index is a dimensionless parameter. Its size can determine the microclimate form above and below the cotton canopy. It can well describe the physiological processes of photosynthesis, transpiration, water interception, and spectral radiation in the cotton canopy system. It is an important physiol...

Claims

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