论文部分内容阅读
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02326m3,以后连年生长量仍处于上升阶段。
This paper systematically investigated the phenology, seedling stage, sapling and tree growth of Pistacia chinensis in China. Seedling growth can be divided into 4 periods: emergence, squatting seedlings, fast growing, slow growing. Sapling tree growth has three peak years, of which the first peak of a long duration, should be to strengthen pre-water and fertilizer management. The rapid growth stage of trees at 1 to 5 years and the DBH stage appeared before 15 years. The annual growth rate and average growth rate intersected at 10a, and the volume growth started to increase after 35 years of growth. The average volume per plant at 80 years was 02326 m3. Annual growth is still in the ascendant.