绿竹开花生理生化特性研究

绿竹 (Ｄｅｎｄｒｏｃｌａｍｏｐｓｉｓｏｌｄｈａｍｉ)属禾本科竹亚科绿竹属 ,原产我国。集中分布浙江南部、台湾、福建及广西、广东等省。在浙江、台湾、福建 3省普遍栽培 ,是亚热带地区优良速生的笋材两用的丛生竹种之一。具有生长迅速、成林快、轮伐期短、笋体大、笋期长、产量高、营养丰富等优点。绿竹笋味鲜美 ,清凉解暑 ,同时具有降压、降脂、增强消化系统功能的作用 ,是夏秋两季深受群众喜爱的美味佳肴。绿竹竹材易降解 ,是应用前景广阔的造纸原料。近年来 ,以笋用林为主要经营目的的绿竹林发展很快 ,并取得丰富的经验 (郑郁善等 ,1…

A STUDY ON THE PHYSIOLOGICAL AND BIOCHEMICAL CHARACTER OF FLOWERING FOR DENDROCLAMOPSIS OLDHAMI

The characters of flowering and non|flowering bamboo at 1|year|old and 2|year|old,including weight per area,chlorophyll content photosynthetic rate,respiratory rate and the content of N,P and K were analyzed.The results showed that comparing the flowering bamboo with non|flowering bamboo, the mean weight per area and total amount of chlorophyll of 1|year|old and 2|year|old bamboo reduced 12.75% and 21.79% respectively,the mean net photosynthetic rate decreased by 10.02%,the mean light respiratory rate and dark respiratory rate increased by 64.52% and 20.05%.The analysis also showed the flowering bamboo had lower assimilation and stronger dissimilation ability than the non|flowering bamboo.Comparing the N,P and K content in different organs,the parts under ground were most distinct,the N,P and K content in roots for flowering bamboo reduced by 17.02%,33.76% and 13.53% respectively compared with non flowering,and those in the stem under ground reduced by 27.43%,66.63% and 51.17% respectively.But the N,P and K content in the stem,branch and leaf of flowering bamboo were higher comparing with the non|flowering bamboo.