Field measuring method of sand broad leaf plant leaf area

Abstract

The invention relates to an area measurement technology of the broad leaved plant vane, particularly to a method using the digital camera to combine the squared paper, the Photograph software measurement and the computation of the broad leaved plant vane. The method includes the steps of collecting the plant vane, soaking with water, extracting the vane when in the measurement, blotting by filter paper, laying on the transparent plastic plate arranged in the row. The plastic plate is put on the fixed standard squared paper, shot by the digital camera, computing the pixel of the vane by the Photoshop software, dividing the pixel value with the area of 1 cm2 of the standard squared paper. A plurality of samples are measured to obtain the mean, namely the vane area of the plant. The method is simple, correct, low in cost, strong in the field maneuverability, especially used for measuring the dehydration broad leaved plant vane, which is a practical method for the scientific research.

Description

technical field [0001] The invention relates to a technology for measuring the leaf area of ​​broad-leaved plants, in particular to a method for measuring and calculating the leaf area of ​​broad-leaved plants by using a digital camera combined with coordinate paper and Photoshop software. Background technique [0002] Leaf is the main organ of plants for photosynthesis and transpiration, and leaf area is the main indicator of plant leaf characteristics, which reflects the degree of adaptation of plants to habitats. At present, the commonly used leaf area measurement methods mainly include paper cutting method, punching measurement method, displacement measurement method, coefficient measurement method, number grid intersection method, photoelectric measurement method, and scanning method. [0003] The kirigami method is simple and convenient, but its accuracy is low for irregularly shaped leaves, and it is not suitable for measuring the leaf area of ​​plants with small leav...

AI Technical Summary

Problems solved by technology

[0003] The kirigami method is simple and convenient, but its accuracy is low for irregularly shaped leaves, and it is not suitable for measuring the leaf area of ​​plants with small leaves. Its accuracy is also affected by factors such as human factors and the uniformity of the paper; punching The measurement method is also flawed, for example, errors are likely to occur in the case of thick leaf veins; the water displacement measurement method is greatly affected by the water status of the plant itself, especially the water content of leaves of different species of sandy plants varies greatly, and air-dried leaves are prone to dehydration under field conditions; The coefficient determination method can be used for in vivo determination, but different plants, varieties, and leaves of different leaf ages need to measure the coefficients separately, resulting in low measurement efficiency; the number grid cross method is relatively accurate, but it requires a lot of labor, and it is difficult to measure leaves with irregular shapes. The accuracy is greatly reduced, and even complex types of leaves cannot be measured, and the counting is greatly affected by human factors; the Win / MacFOLIA broad-leaf image analysis system produced by Canadian REGENT company and the AM200 portable leaf area meter produced by CID company are photoelectric measurement methods Although it can quickly measure leaf area and is easy to operate, it can be used for quantitative analysis of leaf area of ​​plants damaged by environmental stress, disease and insects, but the high cost and high price of this system limit its popularization, and in When measuring with a hand-held instrument, the scanning speed of the blade has a great influence on the measurement result; the scanning method is a digital image processing technology that is widely used and has high efficiency at present, but due to the limitation of the operating location, it is required to operate in the office and a computer is required. , scanner, Photoshop and AutoCAD software, and when the water content of the leaves is high and easy to lose water, it is difficult to pave the leaves and easily damage the scanner

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