不同干型云南松子代苗木生长量与异速生长分析  

Analysis on Growth and Allometric Growth of Pinus yunnanensis Seedlings with Different Stem Types

作　　者：朱雅静 王雪[1,2] 王丹 唐军荣[3] 陈诗[1] 蔡年辉[1,2] 许玉兰[1,2] ZHU Yajing;WANG Xue;WANG Dan;TANG Junrong;CHEN Shi;CAI Nianhui;XU Yulan(Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China,Ministry of Education,Southwest Forestry University,Kunming 650224,China;Key Laboratory for Forest Genetic and Tree Improvement&Propagation in Universities of Yunnan Province,Southwest Forestry University,Kunming 650224,China;Key Laboratory of Biodiversity Conservation in Southwest China,State Forestry Administration,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学,西南山地森林资源保育与利用教育部重点实验室,云南昆明650224 [2]西南林业大学,云南省高校林木遗传改良与繁育重点实验室,云南昆明650224 [3]西南林业大学,西南地区生物多样性保育国家林业局重点实验室,云南昆明650224

出　　处：《云南农业大学学报（自然科学版）》2021年第6期1044-1050,1075,共8页Journal of Yunnan Agricultural University:Natural Science

基　　金：国家自然科学基金项目(31860203,31760204);云南省万人计划青年拔尖人才项目资助(09901-80201441);西南林业大学高值木本油料新种质创制与产业化创新团队(2019HC007)。

摘　　要：【目的】比较不同干型云南松子代苗木生长差异、变异规律和异速生长,为云南松林分改良奠定基础。【方法】分别从昆明宜良、玉溪新平和楚雄禄丰3个群体采集通直和弯扭2种茎干类型的云南松种子进行播种育苗试验,对140个家系的9196株2年生子代苗木的苗高和地径生长量进行测定分析,探讨其类型间与类型内的生长变异规律及异速生长现象。【结果】通直和弯扭2种茎干类型子代苗木生长的变异系数分别为34.80%~42.92%和34.29%~55.36%,云南松弯扭型子代苗木苗高变异系数均大于通直型,2种茎干类型间各生长量指标差异表现不同,苗高的变异比地径的变异明显。3个群体2种茎干类型的苗高与地径异速生长现象差异极显著(P<0.01),新平弯扭型和禄丰通直型苗木异速生长指数符合几何相似模型,为等速生长;其余类型均为异速生长,且不符合3种树木机械设计中的任何一种。【结论】3个群体2种干型子代苗木在相同的培育环境中存在不同程度的变异,相较之下云南松子代苗木在群体间的变异大于类型间,弯扭型子代苗木长势好于通直型子代苗木。[Purpose]To compare the seedling growth difference,variation law and allometric growth of different stem types of Pinus yunnanensis,so as to lay a foundation for stand improvement of P.yunnanensis.[Methods]The seeds of P.yunnanensis with straight and bend/twisted stems were collected from three populations of Yiliang,Xinping and Lufeng,respectively.The seedling height and ground line diameter of 9196 plants two-year-old P.yunnanensis seedlings from 140 families were measured and analyzed,and the growth variation and allometric growth among and within types were discussed.[Results]The coefficients of variation of seedling height and ground line diameter of straight stem type and bend/twisted stem type were 34.80%-42.92%and 34.29%-55.36%,respectively.The seedling height variation coefficient of P.yunnanensis bend/twisted stem type was higher than that of straight stem type.The difference of allometric growth index between the two stem types was different,and the variation of seedling height was more obvious than that of ground line diameter.There were extremely significant differences in allometric growth of seedling height and ground line diameter between the two stem types of the three populations(P<0.01).The allometric growth index of Xinping bend/twisted setm type and Lufeng straight stem type were in accordance with the geometry similarity,and they were isotropic growth.The other types were allometric growth,and did not conform to any of the three tree mechanical designs.[Conclusion]Two kinds of stem types seedlings of three populations had different degrees of variation in the same cultivation environment.In comparison,the variation of P.yunnanensis seedlings among populations was greater than that among types,the growth of the bend/twisted stem type is better than that of the straight stem type.

关 键 词：云南松 干型 生长量 变异规律 异速生长 

分 类 号：S722.33[农业科学—林木遗传育种]