红松不同分布亚区优树群体结实与生长性状分析

对露水河红松无性系种子园中不同分布亚区优树群体的结实和生长性状进行调查与分析,结果表明：在相同立地条件下,结实株率、种子平均产量以南亚区优树群体最高,其次为北亚区,中亚区最低;单株平均结实数、球果平均长度与宽度、单果平均重量、千粒重以南亚区优树最高,其次为中亚区,北亚区最低,与纬度呈现反比状态,而与温度和湿度呈正比。南亚区优树群体的平均树高生长量最大,为10.2 m,分别高出北亚区、中亚区及对照的29.11%、59.38%、92.82%。胸径平均生长量各分布亚区的优树群体之间差异不显著,但均分别高出对照24.87%、21.64%、18.41%。

Seed setting and growth traits analysis on plus tree population in different distribution subregion of Pinus koraiensis

Investigation and analysis on the seed setting and growth traits of plus tree group in different distribution subregion of clonal seed orchard of Pinus koraiensis in Lushuihe,the results showed that： in the same site conditions,the highest seed setting percentage and mean yield of seed appearedue were in south subregion,followed by the north subregion,and the lowest were in the middle subregion.the highest average number of individual seed setting、average length and width of cone、average weight of single fruit、grain weight appeared in south subregion,followed by the middle subregion,and the lowest were in the north subregion,there were indirect proportion to latitude,and direct proportion to temperature and humidity.The average tree height increment of plus tree population in south subregion was maximum,namely 10.2 m,respectively,higher 29.11%、59.38%、92.82% than in the north subregion,in the middle subregion and in the control group.The mean increment of DBH didnit hace significant difference between the plus tree group of different distribution subregion,but 24.87%、21.64%、18.41% respectively higher than those of control group.