Enrichment planting in a logged-over tropical mixed deciduous forest of Laos
Enrichment planting in a logged-over tropical mixed deciduous forest of Laos
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老挝砍伐的热带落叶混交林的浓缩种植
DOI：
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发表时间：
2010
影响因子：
1.5
通讯作者：
Lamphoune Xayvongsa
中科院分区：
文献类型：
--
作者：
Sovu;M. Tigabu;P. Savadogo;P. Odén;Lamphoune Xayvongsa
在次生林中，通常采用富集种植来增加所需树种的密度，次生林的特点往往是普遍存在低商业树种。本研究的目的是确定最佳的富集种植方法维斯于维斯隙和线种植，并评估的性能，两个龙脑香（青皮灰，翅龙脑香）和三个豆类（Afzelia xylocarpa，Pterocarpus macrocarpus，Dalbergia cochinchinchinensis）种植在老挝的采伐过的落叶混交林。强化栽培试验采用随机区组设计，重复7次。造林7年后测定成活率、树高和地径，并进行方差分析。造林成活率在强化种植之间无显著差异（p > 0.05）。然而，直径和高度的增长更有利于在林隙比在种植线。这与林窗和林线的冠层快速闭合有关，但在种植线中更为显著。成活率、树高和胸径的种间变异显著。耐荫树种的存活率和生长量显著高于需光树种（p < 0.0001）。个体的大小级分布不规则，加剧了林下不均匀的光照条件。考虑到难以保持恒定的线宽度和均匀的光照条件，每年清洁操作的成本和种植线的刚性几何图案，建议使用原木覆盖的间隙进行富集种植。在落叶阔叶混交林中，应推荐种植有翅龙脑香和灰葡萄。A. xylocarpa，木果D.可在较宽的林隙、林线和开阔地作为混交种植园或在幼龄采伐林林冠下造林。
Enrichment planting is commonly used for increasing the density of desired tree species in secondary forests often characterized by a prevalence of low commercial species. The objectives of the study were to identify the optimal enrichment planting method vis-à-vis gap and line planting, and to evaluate the performance of two dipterocarps (Vatica cinerea and Dipterocarpus alatus) and three legumes (Afzelia xylocarpa, Pterocarpus macrocarpus, Dalbergia cochinchinensis) planted in logged-over mixed deciduous forest of Laos. The enrichment planting trial was arranged in a randomized complete block design with seven replications. Survival, height and diameter were measured seven years after planting and subjected to analysis of variance. Survival rate of planted seedlings did not vary between enrichment planting (p > 0.05). However, diameter and height growth was favored more in gaps than in planting lines. This was related to rapid canopy closure in both gaps and lines, albeit more remarkable in planting lines. Significant inter-species variation was detected for survival rate, height and diameter. The shade-tolerant dipterocarps had better survival and growth than the light-demanding leguminous species (p < 0.0001). The size class distribution of individuals was irregular, accentuating uneven light condition in the understory. Given the difficulty to maintain constant line width and even light condition, the cost of annual clean operation and the rigid geometric patterns of planting lines, the use of logged-over gaps for enrichment planting is recommended. Dipterocarpus alatus and V. cinerea are recommended for enrichment planting in mixed deciduous forests. A. xylocarpa, D. cochichinensis and P. macrocarpus can be planted in wider gaps, lines and open sites as plantation of mixed species or under canopy of young swidden forests.
影响因子：
5.1
作者：
Zhang, HJ;Tan, GT;Fong, HHS
通讯作者：
Fong, HHS