Growth Performance of Four Dipterocarp Species Planted in a Leucaena leucocephala Plantation and in an Open Site on Degraded Land under a Tropical Monsoon Climate
Growth Performance of Four Dipterocarp Species Planted in a Leucaena leucocephala Plantation and in an Open Site on Degraded Land under a Tropical Monsoon Climate
复制标题
热带季风气候下银合欢人工林和退化土地空地种植的四种龙脑香树种的生长表现
DOI：
10.6090/jarq.48.95
复制
发表时间：
2014
影响因子：
0.4
通讯作者：
Shozo Nakamura
中科院分区：
文献类型：
--
作者：
A. Sakai;T. Visaratana;Tosporn Vacharangkura;Ratana Thai;Shozo Nakamura
为了开发造林方法的龙脑香树种在退化的土地，在热带季风气候，我们研究了不等龄森林管理，龙脑香树下种植的护士树，通过监测其生长20年。1989年，对4种龙脑香（Dipterocarpus alatus，D. turbinatus、Hopea odorata和Shorea henryana）种植在3年生的银合欢种植园下和泰国东北部Sakaerat的开放场地中。直到1995年，在这两个网站的龙脑香树苗的存活率和树的大小进行了监测。银合欢种植园下的龙脑香树成活率明显高于银合欢人工林。然而，两个站点之间的断面积没有观察到明显的差异，因为在开放站点看到存活幼苗的旺盛生长补偿了死亡幼苗的损失。结果表明，D. alatus和H.由于其幼苗生长旺盛，可以在开阔地种植，但最好种植D.在护士树下的陀螺状突起。1993年，银合欢种植园部分间伐至50%、75%和100%（皆伐），并对龙脑香果的存活率和生长进行监测，直至2009年。间伐对龙脑香幼苗的成活率无明显影响。间伐后龙脑香的相对生长速率（RGR）降低，但间伐速率对龙脑香的生长没有影响。间伐后，龙脑香树的高度超过银合欢在所有间伐率，可能从1999年。银合欢和龙脑香树相结合的不均匀年龄系统可能适用于几个龙脑香树种。
To develop silvicultural methods for dipterocarp species in degraded lands in a tropical monsoon climate, we examined uneven-aged forest management, in which dipterocarp trees were planted under nurse trees, by monitoring their growth for 20 years. In 1989, seedlings of four dipterocarp species (Dipterocarpus alatus, D. turbinatus, Hopea odorata and Shorea henryana) were planted beneath a 3-year-old Leucaena leucocephala plantation and in an open site in Sakaerat, north-east Thailand. The survival rate and tree size of the dipterocarp seedlings were monitored at both sites until 1995. Surand svival rates of the dipterocarp trees were significantly better under the Leucaena plantation. However, no apparent difference was observed in basal area between both sites, since saw vigorous growth of the surviving seedlings compensated for the loss of dead seedlings at the open site. Our results showed that D. alatus and H. odorata could be planted in an open site due to the vigorous growth of the seedlings, but that it was preferable to plant D. turbinatus beneath nurse trees. The Leucaena plantation was partially thinned to 50, 75 and 100% (clear-cut) in 1993, and the survival rate and growth of the dipterocarps was monitored until 2009. Thinning had no apparent effect on the survival rates of the dipterocarp seedlings. Although relative growth rates (RGR) of the dipterocarps reduced after thinning, thinning rates did not affect the growth of the dipterocarps. After thinning, dipterocarp trees overtook Leucaena in height at all thinning rates, possibly from 1999. An uneven-aged system combining Leucaena and dipterocarp trees is likely to be applicable to several dipterocarp species.