土壤类型对建瓯雷竹单株生物量的影响

Effect of soil types on biomass of single plant for Phyllostachys violascens cv.prevelnalis forest in Jianou

雷竹作为一种速生、高产笋用竹种,其生物量是研究雷竹林生态系统物质循环的基础,也是衡量集约经营雷竹林次生灾害的最直观指标之一。本研究通过对栽培于沙土、壤土和黏土的雷竹进行典型栽培区采样,分析在不同类型土壤生长的不同年龄段雷竹生物量地上部分各器官中的积累和分布规律。结果表明:栽培于不同类型土壤上的1~3a生雷竹生物量鲜重和干重均随着竹龄的增加而增加。其中1a生雷竹单株生物量干重表现为壤土(1381g)>黏土(1341g)>沙土(1278g),2a生雷竹单株生物量干重大小顺序为沙土(2131g)>黏土(1595g)>壤土(1517g),3a生雷竹单株生物量干重大小顺序为黏土(2362g)>沙土(2190g)>壤土(1837g)。不同器官之间生物量的分布差异明显,总体表现为秆>叶>枝。其中沙土更有利于竹叶的生长,壤土更有利于竹秆的生长。

As a fast-growing, high-yield bamboo shoots species, biomass is the basis for the study of material circulation in Phyllostachys violascens cv. prevelnalis ecosystem, also act as one of the most direct indicators to measure the secondary disaster of intensive management in P. violascens cv. prevelnalis forest. In this study, 3 typical bamboo forest that cultivated in different soil types was selected as experimental materials to discuss the accumulation and distribution of biomass in various aboveground organs of P. violascens cv. prevelnalis forest. The results showed that both the bamboo fresh weight and dry weight increase with bamboo age between 1 to 3 years. The biomass dry weight was decreased as follows of loam soil （1381 g）〉clay soil （1341 g）〉 sandy soil （1278 g）for lyear old P. violascens cv. prevelnalis, the biomass dry weight for 2 and 3 years old P. violascens cv. prevelnalis was decreased as follows of sandy soil （2131 g）〉clay soil （1595 g）〉 loam soil （1517 g）and clay soil （2362 g）〉 sandy soil （2190 g）〉 loam soil （1837g）, respectively. The distribution of biomass differed among different organs and the overall performance was culms 〉 leaves 〉 branches. And the sandy soil was more conducive to the growth of bamboo leaves and loam soil was more conducive to the growth of culms.