不同伐桩高度和林分密度对大叶相思萌芽更新的影响

Ef fects of Stump Height and Stand Density on The Sprout Regeneration of Acacia auriculiformis

大叶相思(Acacia auriculiformis)是一适应性强、用途广泛的速生固氮树种,60年代初引进我国,被认为是在我国北回归线以南地区具有广阔发展前景的荒山造林、园林绿化、环境保护及薪炭材树种。 薪材树种的重要特性之一,是要具有较强的萌芽或萌蘖能力。据报道。

A study was conducted in a split plot design with three replications to investigate the effects of stump height and stand density on the sprout regeneration of 3-year-old Acacia auriculijormis at Yangjiang, Qionghai County (110°30'E, 18°14'N) of Hainan Province. Results showed that both the stump height and stand density had statistically significant effects on the number of sprouts produced per stump, and diameter (50 cm above the point of origin) and biomass production of sprout forests 19 months after cutting. The percentage of stump sprouting, and survival rate of stumps and length of sprouts 19 months after cutting were significantly influenced by stump height but not stand density. To maximize the biomass production of sprout forests of A. auriculiformis,a. stump height of 60 cm is recommended.