荔枝树冠长势的几种测量方法对比

Comparison of Several Measurements for Growth Vigor of Litchi Tree Crown

选择长势稍有差异的两组糯米糍(Nuomici)荔枝树,探索测量荔枝(Litchi chinensis Sonn)树冠长势的简单和精确的方法,分别测量他们的末次秋梢枝条长度、枝条粗度、复叶数、小叶数、小叶长度、小叶宽度、叶片厚度、叶脉粗度、叶片鲜重、自然干燥叶片的重量、烘干至恒重的叶片重量等。结果表明:在两组长势稍有差异的同一个荔枝品种中,他们的枝条长度、枝条粗度、复叶数、小叶数、小叶长度、小叶宽度、叶片厚度、叶脉粗度等数据没有统计学上的显著差异,但叶片鲜重、自然干燥叶片的重量、烘干至恒重的叶片重量则差异显著。作者认为:通过测量叶片鲜重来定量判定荔枝果树树冠长势的方法是既简单又精确的办法之一。

The autumn shoots on two groups of litchi trees（Litchi chinensis cv.Nuomici） that different slightly in tree vigor were investigated in order to find a simple and accurate method to measure the growth vigor of litchi trees.The length and thickness of the shoots were measured and the leaves on these were also measured to find the difference in thickness and lengths and number of compound leaves,number of leaflets on compound leaf,leaflet size and vein diameter,leaf fresh and natural or oven weight between the tow groups.The results showed that there was no significant difference between the tow groups in shoot length and thickness and in other parameters of leaves except for leaf weight.Leaves from more vigorous trees were apparently more heaver,in terms of leaf fresh weight and dry weight,than those from less vigorous trees.Therefore,it is recommended to measure leaf fresh weight to evaluate the growth vigor of litchi trees.