油棕不同叶序的叶片长宽及其含水量变化规律研究

对成龄油棕不同叶序的叶片长、宽以及含水量进行了测定,探讨叶序与这三个因素之间是否存在一定的规律性。根据油棕叶片在树冠轮生的规律来对不同成熟度的叶片进行排序并取样测定。结果表明成龄油棕树种8～26叶长度呈现较为一致的变化规律,而小叶宽则呈无规则变化,各油棕树第16叶的小叶长最为接近,且各油棕树第18叶的小叶宽最为接近。叶长与宽比值无规律,变化范围17.6～33.5;油棕不同叶序的叶片含水量呈现比较一致的变化趋势,均以16和18叶含水量最高,可达59.4%～64.6%,而且嫩叶总体比老叶含水量高。

Study on the change rules of the length and width and content of water of different leaf arrangement of Oil palm

The length, width and content of water of leaves with different leaf arrangement of oil palm had been measured to find the changing rules of them in this paper. And many leaves with different degree of maturity had been chosen and analyzed, according to the verticillate rule of oil palm leaves. The results showed that the changing rules of length of NO.8 leaf to NO.26 leaf was same, while their width changing was not regular. The length of NO.16 leaf and the width of NO.18 leaf were adjacent among the three oil palm trees. But the change of ratio of leaf length to width was not regular, ch consistent in different oil palm leaves. And the were from 59.4% to 64.6%.And the water content anged among 17.6 to 33.5.The change of leaf water content was water content of NO.16 to NO.18 leaf was the highest, which of young leaves was higher than the older leaves＇.