不同品系杉木幼苗侧枝生长发育的比较研究

In order to select the seedlings of Cunninghamia lanceolata with good plant type and excellent conditions of lateral branch,A plantation with three different strains of annual seedlings of Cunninghamia lanceolata(tissue culture seedling of yang-020 clones,yang-061 clones and Cunninghamia Lanceolata cv.Luotian)were planted in the greenhouse of Fujian agricultural and Forestry University.The seedling growth and lateral branch growth index were measured,and compare the differences of Lateral branch development of different strains of Cunninghamia lanceolata,to analyze the correlation between the growth of lateral branches of three Cunninghamia lanceolata.The study indicated that:(1)the seedlings among three different strains of Cunninghamia lanceolata has significant differences on ground diameter growth,tree height and height/diameter ratio.Among them,Yang-020 provide more nutrients for high growth and Cunninghamia Lanceolata cv.Luotian provide more nutrients for ground diameter growth;(2)There are significant differences in the number of rounds,number,length and angle of lateral branches among the three different strains of Cunninghamia lanceolata,but there is no significant difference in the basal diameter of lateral branches.(3)There is a very significant positive correlation between the length of lateral branches of three different strains of Cunninghamia lanceolata and its seedling height.There is a very significant positive correlation between the basal diameter of lateral branches and its ground diameter of Yang-020 and Cunninghamia Lanceolata cv.Luotian,while the basal diameter of lateral branches of Yang-061 has a very significant positive correlation with its seedling height.