Growth and Photosynthetic Pigment Content of Superior Seedlings of Pinus massoniana

The test materials were improved seeds which phenotypic traits were from superior seedlings of Pinus massoniana in Ma Anshan forest farm, Jundu Guizhou. Varieties on growth performance, photosynthetic pigment, and root architecture between superior and normal Ⅰ, Ⅱ seedlings were analyzed in this study. The results showed that above ground biomass of superior seedlings mainly accumulated in stems, the allocation of biomass in leaves and stems were 40.8% and 40.3% in superior seedlings, but the allocation of biomass in leaves was twice times than stems in Ⅰ, Ⅱ seedlings were 2.7 times. Root length, diameter, surface area and volume of superior seedlings were significantly higher than normal seeds, especially for root diameter between 3 and 4 mm.The superior ones presented stronger photosynthetic ability, with 48.3% and 11.7% higher than seedlings in class Ⅰ for chlorophyll. Generally, superior seedlings of P.massoniana had obvious advantage while out from nursery, however, planting performance in forestation should concern with influenced from environmental factors of site conditions.