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Method for measuring plant leaf blade area

A plant leaf and measurement method technology, which is applied in the field of plant leaf area measurement, can solve problems such as errors and leaf area errors, and achieve the effects of improving efficiency, wide application range, and accurate measurement area

Inactive Publication Date: 2007-08-22
VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI
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AI Technical Summary

Problems solved by technology

The gravimetric method also has large errors when the thickness of the leaves is uneven; the leaf area meter method needs expensive instruments to measure the leaf area, and there are also errors in the measured leaf area.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] Taking the measurement of watermelon leaf area as an example to introduce the implementation steps:

[0019] Step 1. Measure the area S1 of the blank paper

[0020] Use a ruler to measure the area of ​​A4 white paper: S1=21×29.7cm 2 ;

[0021] Step 2. Weigh the weight of blank paper (G1)

[0022] Weigh the blank paper on a 1 / 1000 sense balance: G1 = 4.43 grams

[0023] Step 3. Collect the leaves of the plants in the field, and pay attention to ensure that the leaves are intact.

[0024] Step 4, copy the plant leaves on the copier;

[0025] Turn the copier on, lay the blades flat, and make copies. At this time, the image of the watermelon leaf is formed on the white paper.

[0026] Step 5. Cut out the watermelon leaf image on the white paper after copying with scissors;

[0027] Step 6. Weigh the white paper after cutting the image (G2)

[0028] Weigh the blank paper on a 1 / 1000 sense balance: G2 = 2.763 grams

[0029] Step 7, calculating the leaf area of ​​the ...

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Abstract

The invention discloses a measuring method of plant blade area, its main steps are: copy plant blade by a copycat, according to the relationship between image area on white paper and paper weight and area, area of blade is calculated. The method is simple and feasible, its main merits are: (1) Extensive applicability. It is applicable for many blades and can get more accurate area of blades with irregular shape. (2)Rapid measuring speed. Compared to square method, this method can reduce work and improve efficiency to 5-10 times for irregular blade. (3) Accurate measuring data. It reduces error resulting from determining square number manually than square method, so it is more accurate. Therefore, it has applying value for calculating blade area, which can be applied in agricultural researches and productions extensively.

Description

technical field [0001] The invention relates to a method for measuring leaves, in particular to a method for measuring the area of ​​plant leaves. Background technique [0002] Plants produce nutrients through photosynthesis to make plants grow continuously and form yields. Leafs are the organs of plants for photosynthesis, and their size is one of the important factors that determine the amount of photosynthetic products. When the photosynthetic rate of plants and the time of light exposure are constant, the size of the leaf area directly affects the amount of photosynthetic products of the plant, thus directly affecting the crop yield. Therefore, the research on the characteristics of plant leaves is very important at home and abroad, and in the study of the characteristics of leaves, the measurement of leaf area is the basis of work. At present, the methods for measuring leaf area mainly include grid method, weight method, and leaf area meter method. The grid method is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/28
Inventor 焦自高王崇启董玉梅肖守华
Owner VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI
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