By taking split plot design,two year old Chinese fir( Cunninghamia lanceolata )clones were tested.Six fertilization treatments and ten clones were used.The results showed that fertilization could effectively promote t...By taking split plot design,two year old Chinese fir( Cunninghamia lanceolata )clones were tested.Six fertilization treatments and ten clones were used.The results showed that fertilization could effectively promote the growth of Chinese fir clones.The difference among various fertilization treatments was significant.After fertilizing,the height increment and DBH increment increased were 9.66%～28.50% and 18.67%～63.86% higher than that of unfertilized one.The interaction between clone and fertilization was not obvious.The difference of various fertilization treatments on the growth of Chinese fir young plantation was significant.Applying base fertilizer (calcium magnesium phosphate) alone could increase the increments of height and DBH by 13.04%～20.29% and 27.71%～45.78% respectively.Topdressing (urea) could increase the increments of height and DBH by 6.82%～9.66% and 12.40%～18.67% respectively.展开更多
The results of seedling stage trial showed that with the pattern of sowing seeds as they are collected, transplanting in the row spacing of 15 cm×20 cm, shading and under normal cultivation conditions, the mean h...The results of seedling stage trial showed that with the pattern of sowing seeds as they are collected, transplanting in the row spacing of 15 cm×20 cm, shading and under normal cultivation conditions, the mean height and basal diameter of 16 month old seedlings were 72 9 cm and 0 98 cm,respectively. The survival rate of afforestation of bare rooted seedlings reached as high as 98.5%. The increment peak of tree height and DBH is in May August. The growth period is in April September and the stagnant period of growth is in January March and October December. At the age of 4 years old, the current annual increments of height and DBH were the maximum. The mixed stand of M. hedyosperma and Cunninghamia lanceolata has well stand structure. Under the optimal mixing treatment, the mean tree height and DBH of 4 year old M. hedyosperma are 3 99 m and 6.18 cm, while that of C. lanceolata are 5 05 m and 8 55 cm, which is 10 1% and 19 1% higher than that of C. lanceolata pure stand.展开更多
文摘By taking split plot design,two year old Chinese fir( Cunninghamia lanceolata )clones were tested.Six fertilization treatments and ten clones were used.The results showed that fertilization could effectively promote the growth of Chinese fir clones.The difference among various fertilization treatments was significant.After fertilizing,the height increment and DBH increment increased were 9.66%～28.50% and 18.67%～63.86% higher than that of unfertilized one.The interaction between clone and fertilization was not obvious.The difference of various fertilization treatments on the growth of Chinese fir young plantation was significant.Applying base fertilizer (calcium magnesium phosphate) alone could increase the increments of height and DBH by 13.04%～20.29% and 27.71%～45.78% respectively.Topdressing (urea) could increase the increments of height and DBH by 6.82%～9.66% and 12.40%～18.67% respectively.
文摘The results of seedling stage trial showed that with the pattern of sowing seeds as they are collected, transplanting in the row spacing of 15 cm×20 cm, shading and under normal cultivation conditions, the mean height and basal diameter of 16 month old seedlings were 72 9 cm and 0 98 cm,respectively. The survival rate of afforestation of bare rooted seedlings reached as high as 98.5%. The increment peak of tree height and DBH is in May August. The growth period is in April September and the stagnant period of growth is in January March and October December. At the age of 4 years old, the current annual increments of height and DBH were the maximum. The mixed stand of M. hedyosperma and Cunninghamia lanceolata has well stand structure. Under the optimal mixing treatment, the mean tree height and DBH of 4 year old M. hedyosperma are 3 99 m and 6.18 cm, while that of C. lanceolata are 5 05 m and 8 55 cm, which is 10 1% and 19 1% higher than that of C. lanceolata pure stand.
