修剪施肥对油茶叶绿素含量及光合速率的影响

Effect of Pruning and Fertilization on Chlorophyll Photosynthetic Rate of Camellia oleifera

本文以江西省塘湾镇普通油茶幼林为研究对象,研究了修剪处理和施肥对油茶树体生长及光合作用的影响。结果表明:整形修剪大幅度提高了油茶幼树树体和树冠高度以及树体冠幅横径、纵径的生长量,并且明显促进春梢的生长,且大幅度增加了叶片叶绿素含量并提高了光合效能。3,4,5,6,7,8施肥处理对促进树体生长效果显著,1,2,6,8,9处理则明显的促进了油茶春梢的生长,7,4,1,8,9处理明显提高了叶片叶绿素含量,而叶片光合速率则随修剪强度的增加而提高。因此,结合冠型控制来对春梢和夏梢加强修剪,并适度的提高修剪强度对促进油茶幼树的生长作用较为明显。

This paper studied the effect of pruning and fertilization on the growth and photosynthesis of Camellia oleifera taking juvenile forest as an objective in Tangwan town Jiangxi Province. The results showed that pruning increased the height of juvenile tree trunk and crown, and the transverse and vertical diameter of tree crown were promoted to a large extent. In addition, the growths of spring shoot, content of chlorophyll and photosynthesis rate were also increased by the treatment of shaping and pruning. The fertilization treatment of 3, 4, 5, 6, 7, 8 significantly promoted the growth of Camellia oleifera. The treatment of 1, 2, 6, 8, 9 accelerated the growth of spring shoot and the treatment of 7, 4, 1, 8, 9 apparently increased the content of chlorophyll in leaves. The photosynthesis rate increased with the increase of pruning intensity.Therefore, moderate pruning intensity in Spring and Summer combined with the control of crown form was effective to promote the growth of juvenile tree.