香胶树幼林生长特性研究

为给香胶树幼林的抚育管理提供科学依据及可行的技术。在引进香胶树林地内选择10株具代表性的幼树作为样株进行调查研究。茎的速生期为6、7月,9月份后生长缓慢;主梢有3个较明显的速生期;4月中旬至5月中旬,5月中旬至6月上旬,6月下旬至7月上旬,其中第二个生长期为12 d左右,占全年高生长期的68.1%;侧枝的生长,仅出现2个较明显的速生期:4月中旬至6月中旬阶段,净生长量为全年侧枝净生长量的80.6%,旬平均净生长量达16 cm,第二个速生期从6月下旬开始至7月上旬结束;地径和胸径均在5月初至5月下旬增长最为迅速,6月下旬至7月中旬开始新一轮速生期。初步掌握了香胶树幼林生物学特性及主梢、侧枝的年生长规律,为及时搞好前期的栽培管理工作,促进香胶树生长提供了依据。

Study on the Growth Characteristic of Young Gum Trees

The study aims to supply scientific basis and available technique for cultivating and regulating the young gum trees.10 representatives were selected from the introduced young gum trees as samples to conduct the investigation.The fast-growing stage of stem was in June and July and it grew slowly after September.The leading shoot had 3 very obvious fast-growing stages:from middle of April to middle of May,from middle May to early of June,and late of June to early of July.And the second was about 12 d,accounted for 68.1% of the whole year fast-growing stages.The growth of lateral branch only appeared 2 very obvious fast-growing stages: middle April to middle June and late June to early July.The net growth in this stage was 80.6% of the whole year lateral branch net growth and the average net growth per ten-day stage reached 16 cm.The ground diameter and the diameter at breast height grew fastest in the beginning of May to late of May and the new turn of fast-growing stage started in late of June to middle of July.The biological characteristic of young gum trees and the year growth rule of its leading shoot and lateral branch were grasped preliminarily.