除萌方式对杉木采伐迹地更新马尾松生长的影响

Growth analysis of Pinus massoniana after removal sprouts by different gradient of Cunninghamia lanceolata in the cutover land

对贫瘠土地上的杉木林进行采伐,更新营造马尾松林。在幼林抚育时对伐桩上的杉木萌芽条采取全面除萌、选择性除萌、每桩留单除萌3种处理方式,分析对比造林10年后3种处理方式下马尾松幼树的树高、胸径、枝下高生长差异。结果表明,马尾松平均树高和枝下高均表现为:每桩留单除萌>选择性除萌>全面除萌,且差异性极显著;马尾松幼树的胸径则表现为:全面除萌>选择性除萌>每桩留单除萌,且差异性显著。

Pinus massoniana plantation was updated after cutting Cunninghamia lanceolata plantation in barren ground. During the period of nurture of P. massoniana forest,sprouts of Chinese fir stump were removed in three treaments including comprehensive removal,selective removal,one sprout left,then growth situation（ height,DBH,clear bole height） were analyzed in the ten year planted forest. Results showed as follows. At the levels of height and clear bole height,one-sprout-left treatment was significantly higher than that of selective removal and comprehensive removal. When it comes to DBH,comprehensive removal was significantly larger than that of selective removal and one-sprout-left treatment.