The leaf area of ​​pomelo tree is closely related to the yield and quality of grapefruit. Therefore, the measurement of leaf area is very important. There are many ways to determine the area of ​​fruit and leaves, but there are not many methods that are simple and accurate. Previous studies on leaf area formulas using regression analysis in other fruit trees have been extensive, but there have been no reports on grapefruit. Because pomelo is relatively large due to its large blade size, it is more difficult to determine its leaf area by other methods. (Other methods, either requiring leaf picking, or expensive instruments, or poor accuracy, we have made the following discussion. Leaf area meter The determination of leaf area plays an important role.
The obtained leaf area formula was used to calculate the area of ​​28 true leaves and 28 wing blades of the two pomelos that were not used for regression analysis. Finally, the mean value of the measured areas of the true leaves and wings of the two pomelos was calculated. Measured errors and total area errors (errors between the sum of the actual area of ​​the 28 leaves and the sum of their calculated areas), and the significance of the difference between the mean value of the measured area and the mean value of the actual area obtained for each formula is determined by the group method. test.
The F value of the determination of the equation was between 29218578 and 1118214451, which also reached a very significant level. From the correlation coefficient, F value, from the regression standard deviation, whether true leaf or wing leaf is measured by the long @ wide leaf area regression formula » is the most accurate. In addition, from the intercept value of each equation, the absolute value of the intercept of formula 1, o is much larger than that of formula », which makes use of the formula. Measuring the lobular leaves a huge percentage error, while the formula » produces a small percentage error.
The measurement of leaf area instrument found that it is completely feasible to estimate the leaf area by measuring the length and breadth of the true leaf of the pomelo and the wing. Calculate the area accuracy using the Long@wide leaf area regression formula. The leaf area of ​​hybrid pomelo and Shatian pomelo can be obtained using their common formula. Leaflets that are particularly small for the leaflets can be measured only by leaf area representing leaf area.
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