Growth of Cunninghamia lanceolata Cuttings with Different Clones and Specifications

Afforestation was implemented in 1992 in Kaihua, Zhejiang province, by cuttings of Cunninghamia lanceolata with three different clones and five different seedling specifications. Investigations in 2014 demonstrated that survival and conservation rate of cutting seedlings had no evident difference among clones and specifications, topped to 95% and 85%. Height growth, DBH and individual volume had extremely significant difference among clones, the best clone was Kaitian New 6 with height of 15.56m, DBH of 15.48 cm and individual volume of 0.1598m3. DBH and individual volume had great difference among seedling specifications, the best seedling specification was grade I with height of 14.39m, DBH of 14.34 cm and individual volume of 0.1309m3. Comparisons on growth traits of 1-, 3-, 5-, and 8-year Chinese fir with different seedling specifications demonstrated that height growth, DBH and individual volume reduced difference along with ages among seedling of gradeⅠ, Ⅱ, Ⅲ and Ⅳ. Height diameter ratio had no evident difference among clones and specifications, Kaitian 57 had the biggest of 100.64. Crown diameter ratio had significant difference among clones, the lowest was Kaitian New 6 of 14.26. The afforestation and investigation resulted that Kaitian New 6 had the best effect in growth and form traits, could be recommended to plant in medium site conditions of Kaihua country.