摘要
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 search for the ways to restrain the flowering process and promote the regeneration of bamboo（Phyllostachys heteroclada）,five types of regeneration experiments were conducted,including 1） harvesting all the bamboos in the first year and the flowered bamboos in the next year all at the beginning stage of florescence,2） harvesting the flowered bamboos at the beginning stage of florescence in two consecutive years,3） harvesting the fully flowered bamboos in the first year and the bamboos at the beginning stage of florescence in the next year,4） fertilizing the bamboo floor before growing season in consecutive two years,and 5） no any manipulation.In each of the cases,the carbon-and nitrogen metabolism and related enzyme activities in bamboo rhizome were studied.The results showed that treatment 1 had the best effect,which resulted in the greatest number（207） of new shoots produced and with the highest survival rate（69.33%）,and had the most obvious effect on restraining bamboo flowering and promoting regeneration.Also,it produced the highest contents of soluble sugar（10.89%） and total sugar（20.39%）,the highest total sugar to total nitrogen ratio（34.56）,and the highest glutamine synthetase activity（104.52 mg·g-1·h-1） in bamboo rhizome.These findings demonstrated that the carbon-and nitrogen metabolism in the rhizome had definite relationships with the flowering process and regeneration of bamboo,and the rhizome growth played a critical role in bamboo propagation.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第8期1953-1958,共6页
Chinese Journal of Applied Ecology
基金
国家"十一五"科技支撑计划项目(2006BAD19B0305)
四川省教育厅科研项目(08zb093)资助
关键词
水竹
开花
更新试验
地下茎
碳氮代谢
Phyllostachys heteroclada
flowering
regeneration experiment
rhizome
carbon-and nitrogen metabolism.
