杉木萌芽条保留数量对马尾松幼林生长的影响

Effect of the Reservation Quantity of Cunninghamia lanceolata Coppice Shoots on the Growth of Young Pinus massoniana Forests

实验表明：在Ⅲ类立地的杉木迹地上营造马尾松，每公顷保留１２００－１５００株的杉木萌芽条，能起到促进马尾松幼林生长的作用；至７－８年间伐时每公顷可获纯利３８００元。该类型幼林在７年生时应进行一次高强度（４０％－５０％）的间伐，以保证马尾松的生长不受影响。

The experiment indicates that to plant Pinus massoniana on Ⅲ- type sites of blanks of fellingCunninghamia lanceolata the measure of reserving 1200-1500 C. lanceolata coppice shoots per ha canpromote the growth of young P. massoniana forests and the pure profit of 3800 yuan（RMB）can be obtainedfor the thinning each ha during 7-8 years．The high-intensity（40-50％）thinning should be conducted forthis type of young forests at the age of seven years in order to prevent the growth oF P. massoniana from beingaffected.