高节竹竹鞭空间分布及其数量特征

spatial Distribution and Quantitative characteristics of phyllostachys prominens Rhizome

摘要:

为 了解高节竹竹鞭空间分布及其数量特征,揭示高节竹地下竹鞭生长规律,为高节竹林分更新提供理论依据, 以 高节竹成熟林分为材料,在林分内设置标准地,在标准地内布设样方,采取挖掘法调查竹鞭空间分布及其数量特征 。结果 表明:在 0~30cm土层中竹鞭重量为 4252. 07g ● m- 2 , 占总鞭重的 99. 57% ; 3 a 生竹鞭鞭长最长为 305. 72cm ● m- 2 , 占 总鞭长的 23. 18% ;6a生竹鞭平均节间长最长为 4. 83cm2 壮芽主要着生在 1~3a鞭龄鞭段上, 占 99. 04%;休眠芽主要着 生在 1~3a竹鞭上, 占 85. 71%;死芽主要着生在 3~5a竹鞭上, 占 84. 44%;笋芽主要着生在 2~3a竹鞭上, 占75. 00% 。 高节竹竹鞭集中分布在 0~30cm土层中,壮龄鞭鞭长最长、老龄鞭平均节间长最长、壮龄鞭平均鞭径最大,壮芽、笋芽及休 眠芽主要分布在 1~3a鞭上,死芽主要分布在 3~5a鞭上。

Abstract:

To understand spatial distribution and quantitative characteristics of phyllostachys prominens rhizome, and reveal growth laws of underground bamboo rhizome, so as to provide theoretical basis for the regeneration of phyllostachys prominens stands. sample plots were selected in the mature phyllostachys prominens stands,in which quadrates were setup. Digging-method was used to survey the spatial distribution and quantitative characteristics of phyllostachys prominens rhizome . The results showed that:the weight of phyllostachys prominens rhizome was4252. 07g ● m—2 in the topsoil of 0~30 cm, accounting for 99. 57% of the total weight of the rhizome; the rhizome length (3years) was up to 305. 72 cm ● m—2 ,accounting for 23. 18% of the total length ; the mean internode length (6years) was up to 4. 83cm2 Robust buds mainly serried in the rhi- zome sections(1~3years),accounting for 99. 04% ; dormant buds mainly grew in the rhizome sections(1~3years) , reac- hing up to 85. 71% of the total ; dead buds covered rhizome sections(3~5years), counting the ratio of 84. 44% ;shooting buds chiefly existed in rhizome (2~3years), occupying 75. 00% of the total. phyllostachys prominens rhizomesconcen- trated in the topsoil of 0~30 cm; the length of mature rhizomes was maximum; the internodes of over-mature rhizomes were the longest, the mean diameter of mature rhizomes was the largest ;robust buds, shooting buds and dormant buds ma- jorly distributed in the rhizomes(1~3years); dead buds existed in the rhizomes(3~5years) .