论文部分内容阅读
为了抑制水竹的开花进程,促进开花水竹林的复壮和更新,2006—2007年,以中国大熊猫保护中心雅安碧峰峡繁育基地水竹林为对象,采用5种处理[竹林始花时皆伐、次年始花时砍除新发竹林内的开花竹;连续两年始花时砍除开花竹;第一年开花盛期皆伐、次年始花时砍除开花竹;连续两年于发笋及开花前分别对竹林进行施肥;不采取任何干预措施(对照)]进行开花水竹林更新试验,并对不同处理水竹地下茎中主要碳氮代谢物质及相关酶活性进行分析.结果表明:水竹最佳更新措施为始花时皆伐并于次年砍除开花竹,与其他处理组相比,其新发竹数和成竹存活率分别为207株和69.33%,为各处理组最高,抑制开花进程和促进竹林恢复的效果最显著;该处理组水竹地下茎中可溶性糖、总糖、总糖/总氮含量最高,谷氨酰胺合成酶活性最大,分别是10.89%、20.39%、34.56和104.52 mg.g-1.h-1.竹类植物地下茎碳氮代谢状态与开花进程和复壮效果之间有一定的联系,且对其发笋成竹起关键作用.
In order to restrain the flowering process of bamboo and to promote the rejuvenation and renewal of flowering water bamboo forest, from 2006 to 2007, five treatments were applied to water bamboo forest in Bifengxia breeding base of Ya’an, China. , The next year began to cut off flowering bamboo within the newly-developed bamboo forest; cut flowers for the first time in two years when the flowering bamboo; the first year flowering season clear cutting, cut the flowering bamboo the following year; for two consecutive years in the bamboo shoots and Before fertilization, the fertilization of bamboo forest was carried out separately. No intervention (control) was used to conduct the experiment of flowering and water bamboo regeneration, and the main carbon and nitrogen metabolism substances and their related enzymes activities in underground stems of different treatments were analyzed.The results showed that: Compared with other treatment groups, the best regeneration rate was 207 and 69.33%, respectively, which was the highest in all treatment groups and the highest in all treatment groups The flowering process and the promotion of bamboo forest restoration were the most significant. The contents of soluble sugar, total sugar, total sugar and total nitrogen, and glutamine synthetase activity were the highest in the underground rhizomes of Phyllostachys pubescens, 10.89%, 20.39%, 34.56 and 104.52 mg.g-1.h-1. Bamboo plants The underground carbon and nitrogen metabolism is related to the process of flowering and rejuvenation, and plays a key role in its bamboo shoot growth.