极危物种毛环方竹出笋成竹规律  

Research on Rhythm of Shooting and Growth for Critically Endangered Chimonobambusa hirtinoda

作　　者：苏春花[1] 朱四喜[1] 张浩[1] 罗贵[1] SU Chun-hua ZHU Si-xi ZHANG Hao LUO Gui(College of Chemistry ＆ Environmental Science, Guizhou Minzu University ,Guiyang 555025, Guizhou, Chin)

机构地区：[1]贵州民族大学化学与环境学院,贵州贵阳555025

出　　处：《福建林业科技》2016年第3期153-156,共4页Journal of Fujian Forestry Science and Technology

基　　金：贵州省科学技术基金(黔科合J字[2012]2192号;贵州省科学技术基金(黔科合丁字LKM[2012]05号)

摘　　要：在极度濒危物种毛环方竹的天然分布区（中国贵州斗蓬山）,对毛环方竹的出笋规律、退笋数量分布及幼竹高生长规律进行研究,结果表明：毛环方竹的出笋期从9月初—9月底,历时25 d;出笋的数量呈少—多—少的动态变化规律,9月13—21日为出笋盛期。对于整个出笋期而言,退笋数量占出笋总数量的83.3%,盛期退笋最多,其数量达总出笋数的58.5%。在出笋盛期当期出笋数量有85.7%退笋,初期和末期当期的退笋率分别为77.8%、75.0%。人为因素是退笋的主要原因。自然因素引起退笋的高度均在40 cm以下,主要分布范围为10~19 cm;人为因素引起退笋的高度在7个高度级均有分布,主要集中分布于40~99 cm。竹笋幼竹高生长呈现慢—快—慢的高生长规律,Logistic方程的拟合度为0.9959。Chimonobambusa hirtinoda is a critically endangered species, which only survives on Doupeng Mauntain in Guizhou Province, China. The regularity of shooting, quantitative distribution of degenerated shoots and growth were studied. The main results were showed as follows ： the shooting period from early September to the end of September, which lasted a total of 25 days ; the shooting number of bamboo shoots presented less-more-less dynamic changes, with September 13 to 21 was the fast period of shooting. For the whole of the shooting period,83.3% shoots were degenerated, and the fast shooting period had the maximum, which was 58.5%. For the fasted shooting period, 85.7% shoots was degenerated. At the initial stage and the last stage, the ratio respectively was 77. 8% and 75.0%. Human factors are the main cause to shoots degenerated. The height of shoots degenerated by nature factor was under 40 cm, and mainly distributed in 10 - 19 cm ; the height of shoots degenerated by human factor had 7 height-classes, and the main distri- bution rage was 40 -99 cm. Height growth rhythm of culm showed slow-fast-slow, and fitted Logistic equation with the fitting degree of 0. 9959.

关 键 词：毛环方竹 出笋规律 退笋规律 高生长规律 

分 类 号：S795.9[农业科学—林木遗传育种]