At present, there are many methods for determining the leaf area. Using a leaf area meter can quickly and accurately determine the size of the leaf area, which is more direct, simple, accurate, and faster than traditional methods such as grid method. The data obtained is more conducive to research. Calculating the actual area by measuring the length and width of the leaves is very important for dynamic research. The relationship between red leaf area index and yield is rarely reported. The leaf width, leaf length, and leaf area index of red jujube leaves were calculated using the leaf area meter and the correlation between leaf area index and yield was analyzed.
Experimental design: When the jujube fruit matures, the leaf area is the largest, and the photosynthesis at this time is also the greatest. The experiment is to set up a, b, and c3 communities in the red jujube garden. Each group randomly selects 3 groups of 5 red jujube trees at each site. 100 leaves of jujube trees and 100 red dates were randomly collected from different directions of the tree and brought back to the laboratory for the determination of leaf area and fruit weight. 45 samples of leaves and fruits. A random selection of 50 jujube leaves was used to measure the leaf area with a leaf area meter, and a correlation equation was established between leaf area and leaf length x leaf width. According to the calculated leaf area, the leaf area index was calculated according to the following formula.
The statistical analysis of the quantitative characteristics of red jujube leaf area index and yield showed that the quantitative characteristics of leaf area index and yield were widely varied among samples. The leaf area measurement instrument can be used to accurately determine the area of ​​the leaf, and the product of the measured actual leaf area and the length and width of the leaf is subjected to regression analysis, and the linear regression equation of the product of leaf length and width and leaf area can be obtained.
Optimizing the leaf area index to get the appropriate value can coordinate the plant's production of nutrients and reproductive growth, too large or too small to produce the purpose. Within a certain range, the leaf area index uses light energy to convert into organic matter, which is positively correlated with the yield. An important relationship exists between the leaf area index and the yield, which is as high as 1460 kg/667 square meters when the Leaf Area Measurement Index is 2.33. By pruning the jujube tree in the closed environment and improving the leaf area index in an appropriate range, the leaves make full use of light energy and improve the efficiency of photosynthesis to achieve high yield.
Experimental design: When the jujube fruit matures, the leaf area is the largest, and the photosynthesis at this time is also the greatest. The experiment is to set up a, b, and c3 communities in the red jujube garden. Each group randomly selects 3 groups of 5 red jujube trees at each site. 100 leaves of jujube trees and 100 red dates were randomly collected from different directions of the tree and brought back to the laboratory for the determination of leaf area and fruit weight. 45 samples of leaves and fruits. A random selection of 50 jujube leaves was used to measure the leaf area with a leaf area meter, and a correlation equation was established between leaf area and leaf length x leaf width. According to the calculated leaf area, the leaf area index was calculated according to the following formula.
The statistical analysis of the quantitative characteristics of red jujube leaf area index and yield showed that the quantitative characteristics of leaf area index and yield were widely varied among samples. The leaf area measurement instrument can be used to accurately determine the area of ​​the leaf, and the product of the measured actual leaf area and the length and width of the leaf is subjected to regression analysis, and the linear regression equation of the product of leaf length and width and leaf area can be obtained.
Optimizing the leaf area index to get the appropriate value can coordinate the plant's production of nutrients and reproductive growth, too large or too small to produce the purpose. Within a certain range, the leaf area index uses light energy to convert into organic matter, which is positively correlated with the yield. An important relationship exists between the leaf area index and the yield, which is as high as 1460 kg/667 square meters when the Leaf Area Measurement Index is 2.33. By pruning the jujube tree in the closed environment and improving the leaf area index in an appropriate range, the leaves make full use of light energy and improve the efficiency of photosynthesis to achieve high yield.
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