杉木萌芽更新技术与调查分析

通过对杉木萌芽更新林分1～15年生长观测分析,结果表明:1～4年幼树阶段平均树高、地径分别达4.1m、9.5 cm,是同林龄实生幼林的241.2%、351.9%;10年生杉木萌芽更新林分平均胸径、树高、蓄积量分别达11.4 cm、7.8 m、97.9 m3/hm2,是同林龄实生林的142.5%、116.4%、159.2%;15年生杉木萌芽更新林分平均胸径、树高、蓄积量分别达15.6 cm、10.3 m、192.8 m3/hm2,是同林龄实生林的126.8%、103.0%、118.4%;从杉木萌芽更新和实生苗造林前期成本投入来看,前者是后者成本的60.8%。可见,杉木萌芽更新是投入少、技术简单、生长快、轮伐期短的更新方式。

Techniques and Investigation Analysis of Sprouting Regeneration of Cunninghamia lanceolata

Through the observation and analysis of 1~15-year growth of the sprouting regeneration stands of Cunninghamia lanceolata,the results showed that the average height and basal diameter of the 1~4-year-old young trees reached 4.1 m and 9.5 cm respectively,241.2 % and 351.9% those of the seedling forests of the same age.The average DBH,height and timber stock volume of 10-year-old sprouting regeneration forests reached 11.4 cm,7.8 m and 97.9 m3/hm2 respectively,142.5%,116.4% and 159.2% those of the seedling for...