红肉蜜柚结果枝径粗、长度、叶片数与成花的关系

The Relationship between Stem Diameter,Length and Leaf Number of Bearing Branches of Red-fleshed Sweet Pomelo and it’s Flowering

以红肉蜜柚五年生结果树为材料,调查其结果枝分布位置、结果枝径粗、长度、叶片数,研究结果枝生物学指标与成花的关系。结果表明,在树冠垂直方向上结果枝主要分布在30～89cm区域,占总量的77%,90～120cm区域呈减少趋势,仅占总量的23%,120cm以上区域几乎没有花穗;结果枝径粗从2～6mm均可成花,2.5mm占13%,3mm占44.5%,4mm占15%,5mm占13%,以3mm成花率最高;结果枝长度从5～24cm均有成花,长度11cm成花率占19.3%,14cm占28.3%,17cm占21%,以长度14cm的成花率最高;不同区域最佳叶片数与成花关系有所不同,30～59cm区域以6片叶、60～89cm区域以7片叶、而90～120cm区域则以8片叶成花率高,有明显的随着结果枝分布区域的上升最佳成花叶片数增多的趋势。

Red-fleshed sweet pomelo five-year trees were used as material for investigating distribution position, stem diameter, length and leaf number of bearing branches and studying the relationship between the biological indicators of bearing branches and it＇s flowering. Results showed that bearing branches distribute mainly in 30-89 cm zone of vertical direction of canopy, representing 77% of the total bearing branches, reduce in 90-120 cm zone, the ratio is only 23%,almost no flower above 120 em zone; It can flower with the steal diameter from 2 to 6 ram, the flowering rate of 2.5 mm, 3 mm, 4 mm, 5 mm is 13%, 44.5%, 15%, 13% respectively; It can flower with the length from 5 to 24 cm, the flowering rate of 11 cm,14 cm,17 cm is 19.3%, 28.3%, 21% respectively; It is the highest flowering rate with the stem diameter of 3 mm, and the length of 14 era. The relationship between the best leaf number of different zones and it＇ s flowering is different, it is the t.,ighest flowering rate with the leaf number of 6 in 30-59 cm zone, the numbers are 7 and 8 respectively in 60-89 cm zone and 90-120 cm zone, the best leaf number increase obviously with the ascent of distribution zone of bearing branches.