【摘要】 对沙坝林场进行对比观测及调查,结果表明,对秃杉中龄林适时(郁闭度≥0.8)进行抚育间伐;抚育间伐后,郁闭度严格控制在0.6左右(0.55~0.65);间伐中,严格按照"三砍三留"及"均匀"的原则进行;抚育间伐时间一般在10~12月份。方差分析结果表明,间伐过的单株胸径、树高及蓄积总生长量、连年生长量及平均生长量比未间伐过的高,成材早,见效快,效益明显。更多还原

【Abstract】 Comparative observation and survey on Taiwania flousiana in Shaba Farm have been done.Results shows that immature timber intermediate tending timely( canopy density ≥0. 8,after Tending,canopy density strictly controlled in about 0. 6( 0. 55 to 0. 65); intermediate tending is in strict accordance with the principle of "three cut three left"and "uniform"; tending time is generally from Oct to Dec. Variance analysis showed that the plant diameter,trees height and accumulation of total growth,annual increment and average growth ratio are higher than control and with apparent benefit.更多还原