中国黄连木生长规律的研究

本文对中国黄连木的物候、苗期、幼树和大树生长规律进行了系统调查。苗期生长可分４个时期：出苗期、蹲苗期、速生期、缓慢生长期。幼树树高年生长有３个高峰期，其中第１个高峰期持续时间长，应加强前期水肥管理。树高速生生长阶段在１至５ａ，胸径速生生长阶段出现在１５ａ前，连年生长量和平均生长量相交于１０ａ，材积生长一般３５ａ后开始加快，至８０ａ单株材积平均为０２３２６ｍ３，以后连年生长量仍处于上升阶段。

Study on Growth Principle of Pistacia chinesis Bunge

Comprehensive investigations and studies on phonology,seedling stage,growth principle of young plants and grown-up trees of P.chinesis Bunge have been carried out.Growth period during seedling stage could be divided into 4 phases,namely emergence,suspension,fast growth and slow growth.There were 3 peaks for height growth of young plants,of which the first peak lasted longer and required more intensive management of water and fertilization.Fast growth phase for height of grown up trees of P.chinsis Bunge lasted 1-5 years,while for based diameter it appeared during the first 15 years.Increment for annual growth and average growth equaled 10 years later.Volume growth generally accelerated 35 years later and 80 years later,average individual wood volume production could reach 02326m3.From then on annual growth increment remained high.