关键词: 毛竹, 材用竹林, 笋竹两用林, 笋用竹林, 地下结构

Abstract:

180 plots of high yield bamboo forest in main production areas of Phyllostachys heterocycla cv. pubescens in Fujian Province, the underground structure of high-yield bamboo forest were studied and analyzed through two small sampling plots in every plots The results showed that the bamboo rhizome mainly distributed in 0~40cm layer of soil, and that the orders of total length of rhizomes of high-yield bamboo forest were:shoot and timber use forest > timber use forest > shoot use forest, but more than 96% of total rhizome length was in this layer for three kinds of bamboo forests. The total weight of rhizome was in the following order: timber use forest > shoot and timber use forest > bamboo shoot use forest. The length and the weight of young rhizome of high yield bamboo shoot use forest were higher than those of timber use forest, and which of healthy rhizome were timber use forest > both shoot and timber use forest > shoot use forest.There were about 55~66 percent of healthy rhizome in the depth of 0~40cm soil layer. The growth direction of bamboo rhizome was largely parallel, which accounted for 63.2% in the timber use forest, 48.8% and 47.2% in the shoot and timber use forset and the shoot use forest respectively. The buds grown on rhizome were mostly the healthy buds, which made up 77.5% for the timber forest, 77.9% for both shoot and timber forest, and 78.0% for the shoot forest. The results showed that the bamboo forest are in the vigorous stage of shoot emergence.

Key words: Phyllostachys heterocycla cv. pubescens, Timber use bamboo forest, Bamboo shoot and timber use forest, Bamboo shoot use forest, Underground structure