Non-invasive measurement of leaf area of ​​hawthorn by leaf area meter

During the growth and development stage of fruit trees, the health status of the leaves directly affects the health of the fruit trees until it affects the yield and quality of the fruit trees. This is because the leaves of the fruit trees are photosynthetic organs. Only the normal operation of the organs can ensure the functioning of the function. The area of ​​the leaves is an important indicator of the health of the leaves. Therefore, it is very necessary to determine the leaf area. There are many studies on apple, pear, and citrus on the rapid measurement of leaf area. However, if there are many changes in the shape of the leaves, there are significant differences between tree species and varieties. In recent years, the cultivated area of ​​hawthorn has been continuously expanding in our province, and it is necessary to find a rapid, non-destructive, and simple method to determine the area of ​​leaf planting on the mountain. In this regard, a leaf area meter manufactured by Top Instruments is recommended here.

The test variety is open, five-year-old tree, moderate tree vigor. Because of the different shape and size of the leaves on different branches of the branch, the leaves in the middle of the branch are the same and stable. Therefore, six trees are selected. Each leaf on the tree randomly selects 14^}18 nodes in different orientations. Six, first determine their length and width, and then measure their actual area with a leaf area meter. It has been observed that the length and width of mountain plant leaves have a certain correlation with their actual area. Assuming S}} = KXLXH (K is the correction factor), the calculation of 36 leaves: The average value of K is 0.58, and the standard deviation is. .03, which is 5}, = 0.58LXH. According to its degree of freedom n-2 = 33-2 = 34 check seven tables, in the table P = 0.05 when t is 2.030, P = 0.01 when t is 2.724, this 4.121 is greater than the above two, so the correlation coefficient is very significant.

By using the leaf area meter that does not damage the blade, the leaf area was determined and we can summarize the results from the results. We measured the length and width of the hawthorn leaves in the field and calculated it using the formula s=o.58xLxH. Its leaf area size is a simple measurement method that does not harm the structure of the hillside tree.

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