‘长林’系列油茶品种发枝特性分析

为探明‘长林’系列油茶品种的发枝特性,以6年生‘长林’系列8个主栽品种为对象,系统调查和分析树体不同冠层部位的新梢发枝量、新梢长度和新叶比。结果表明,‘长林’系列油茶品种树体不同冠层部位的发枝量、春梢长度和新叶比差异较大,树冠外层的发枝量、春梢长度和新叶比显著高于树冠内层,其中‘长林18号’和‘长林23号’树冠内层的发枝量最少,‘长林3号’和‘长林53号’树冠内层的发枝量最多;‘长林21号’的春梢长度最大,‘长林3号’春梢长度最小;‘长林53号’和‘长林166号’树冠内层的新叶比最高,‘长林4号’和‘长林23号’树冠内层的新叶比最低。根据发枝特性的差异,可将长林系列油茶品种分为3类,分别为‘长林18号’和‘长林21号’,‘’长林53号和‘长林166号’,‘长林3号’、‘长林4号’、‘长林23号’和‘长林40号’。

The Branching Characteristics of ‘Changlin’ Varieties in Camellia oleifera

To clarify the branching characteristics of ‘Changlin’ varieties in Camellia oleifera, six years old trees from eight varieties were selected to investigate the branching number, length of shoot and new leaf ratio of different parts of canopy. The results showed that dramatic difference was found among different parts of canopy in branching number, length of shoot and new leaf ratio. And the branching number, length of shoot and new leaf ratio in the outer canopy were significantly higher than that in inner canopy. The lowest branching number in inner canopy was found in variety ‘Changlin 18’ and ‘Changlin 23’, while the highest branching number was found in variety ‘Changlin 3’ and ‘Changlin 53’. The variety ‘Changlin 21’ had the longest spring shoot, while the average length of spring shoot was the lowest in variety ‘Changlin 3’. In addition, the highest new leaf ratio in inner canopy was found in variety ‘Changlin 53’ and ‘Changlin 166’, while the variety ‘Changlin 4’ and ‘Changlin 23’ showed the lowest new leaf ratio in inner canopy. The 8 tested ‘Changlin’ varieties could be divided into 3 types depending on their branching characteristics, which were ‘Changlin 18’ and ‘Changlin 21’, ‘Changlin 53’ and ‘Changlin 166’, and ‘Changlin 3’, ‘Changlin 4’, ‘Changlin 23’ and ‘Changlin 40’, respectively.