The measurement of leaf area has become an indispensable part of agricultural production. The size of the leaf area index has a great influence on the growth and development of the plant and ultimately the quality of the product. A good method for measuring leaf area should be simple, convenient, and low cost, and each measurement value is highly close to the actual area of ​​the blade to be measured, ie, the error is small and the repeatability is good.
At present, the methods for measuring leaf area mainly include leaf area instrumentation, grid method, punching and weighing method, paper-cutting weighing method, image pixel method, correlation coefficient determination method and regression equation method.
The grid method is labor-consuming and time-consuming, and the error is large when the blade edge is complex.
Puncture measurement method has a certain degree of damage to the leaves of plants, and it is difficult to drill holes for small leaves and leaves with thick veins, and the application range is smaller in practice;
The correlation coefficient measurement method and the regression equation method need to undergo area measurement after more complex mathematical modeling, the accuracy is relatively low, and can only be measured for a certain kind of plant, can not be universal between the varieties and types, in fact It is rarely used in operation.
Paper-cut weighing method is simple and convenient, and does not require special equipment;
Image pixels have the advantages of simple and rapid measurement, batch measurement, etc. Measurements are not affected by factors such as blade size and thickness.
The leaf area meter method uses the leaf area meter to measure, has high accuracy, small error, simple and convenient, can realize the non-destructive measurement of the blade, does not hurt the blade, and has now been widely used.
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