First Report on Growth Law and Afforestation Trial of Tissue Cultured Seedlings in Pinus massoniana
Annotatsiya
This study was conducted to explore the growth law of tissue cultured seedlings in Pinus massoniana and its field growth potential the approach of container seedling and field afforestation. Results showed that height growth of tissue cultured seedlings in P. massoniana was well matched with one-variables quadratic curve. The seedlings grew slowly at the early stage of transplanting,while rapidly grew after 5 months. In comparison with the national standard I,the height of tissue cultured seedling of P. massoniana was 25. 9 cm after 7 months of transplantation,over 29. 5 % higher than that of 1-year-old tree seedling of P. massoniana and P. armandi. The height of tissue cultured seedling of P. massoniana was 30. 5 cm after 8 months of transplantation,over 1. 7 % higher than that of 1-year-old tree seedlings of P. elliottii,P. taeda and P. caribaea. After 1-year afforestation,the survival and preservation rate of tissue cultured seedlings of P. massoniana were better than those of tree seedlings. The growth of height and caliper increased 138. 9 % and 252. 7 %,respectively,and the height-to-diameter ratio decreased 32. 3 %. This study showed that tissue cultured seedlings of P. massoniana would grow fast and be able to adapt environment well. Since it could shorten the period of raising seedling and improve afforestation effectiveness,tissue cultured seedlings in P. massoniana has a wide application prospect.