选地不当致使杉木长成小老树的内在机理探讨  

Probe into the Internal Mechanism of Chinese Fir to Grow into Small Old Trees Due to Improper Selection of Land

作　　者：齐明[1,2] 王海蓉 叶金俊[3] 孙洪刚[1,2] QI Ming(Research Institute of Subtropical Forestry of CAF,Zhejiang Hangzhou 311400)

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江杭州 [2]浙江省林木育种技术研究重点实验室,浙江富阳311400 [3]浙江省遂昌县林业技术推广总站,浙江遂昌323300

出　　处：《林业科技》2020年第5期12-16,共5页Forestry Science & Technology

基　　金：国家重点研发计划(2016YFD0600302-2);中国林业科学研究院基金(195005)

摘　　要：采用比较分析法,以福建洋口8年生的一片杉木杂交试验林为参照物,确认因选地不当,导致遂昌引进洋口的21年生杉木无性系林分为小老树林。然后对遂昌杉木无性系试验林进行抽样,每系抽取3株样树,进行养分分析,将分析结果与福建南平同年大小的杉木人工林的养分吸收与利用结果进行比较。结果表明,从福建洋口林场引种的无性系,生长远远低于福建省8年生杉木杂交子代试验林,是地道的小老树;同为福建南平的杉木良种,并且三地试验林的气候条件基本相似,只有土壤环境和植被存在较大不同。遂昌杉木小老树形成的内在机制是土壤缺磷少氮,导致杉木生长差,同时生长势弱的杉木根系吸收与枝叶利用养分能力就差,这种恶性循环是遂昌杉木小老树形成的内在机理。In order to reveal the inner mechanism of Chinese fir to form small and old trees,it provides scientific knowledges for the successful establishment of Chinese fir plantation in the future.By means of comparative analysis,an eight-year-old Chinese fir hybrid experimental forest in Yangkou,Fujian province was used as a reference to confirm that the 21-year old Chinese fir clonal plantation introduced into Suichang from Yangkou was divided into small and old forests due to improper site selection.The results were compared with the results of nutrient absorption and utilization in the plantation forest of China fir of the same age in Nanping,Fujian province,so as to reveal the internal mechanism of Chinese fir clones to become small and old trees.the clones introduced from the Yangkou forest farm in Suichang grew much lower than those from the 8-year-old Chinese fir hybrid test forest in Fujian province.Both of them are fine species of Chinese fir in Nanping,Fujian,and the climate conditions of the three experimental forests are basically similar,except that the soil environment and vegetation are quite different.The internal mechanism of the formation of small and old trees of Chinese fir clonal plantation in Suichang is the lack of phosphorus and nitrogen in the soil,which leads to the poor growth of Chinese fir and the poor ability of its roots to absorb and utilize nutrients in its branches and leaves.This vicious cycle is the internal mechanism of the formation of small and old trees of Suichang fir.

关 键 词：杉木 土壤养分 小老树 内在机制 

分 类 号：S718.43[农业科学—林学]