摘要
缺苞箭竹是大熊猫最喜食的竹种之一,主要分布于四川的岷山山系,构成冷杉林下的主要层片。通过两年的定位观测发现: 1.在春季,缺苞箭竹地下部分生长是最活跃的,它包括秆基笋芽的萌发和上年萌发笋芽的走“鞭”发笋。 2.地上部分秆茎生长分为四个阶段,即延缓期,指数生长期,相对生长下降期和休眠期。在第二阶段生长最快,生长量最大,占年高生长量的92％,日最大高生长量为6.1cm。这一阶段的最大特点是气温和生长波动的高度协调。在不同立地条件下这一生长期长短是不同的。 3.通过箭竹生长与气温,太阳辐射,降水等气候因子的回归分析,结果表明:温度是支配箭竹生长的主导因素。
Fargesia denudata, which composed a major layer under Abies faxoniana forests, was one of the favorite staple bamboos for the Giant Panda, and was distributed mainly in the Mt. Minshan ranges. It was found through two years observation of fixed sites: 1. In spring, the growth of the bamboo underground parts was the most active, it included basal buds germinating and cross growing of buds germinated last year. 2. It was given four stages for the growth of bamboo aboveground parts, i. e.. Slow growth stage (Ⅰ), exponential stage (Ⅱ), relative growth decreasement stage (Ⅲ) and dormant stage (Ⅳ). The quickest growth occured in the stage Ⅱ , and for the maximum height growth increment with a percentage of 92% of year-around one, and also for the maximum day height growth increment of 6.1cm. It characterized markedly in the stage Ⅱ that growth was harmonious with temperature fluctution, the duration of the stage was varied under various sites. 3. It was found, by the regression analysis between growth of Fargesia denudata and climate factors (Such as: temperature, Solar radiation, Precipiation etc.), that temperature dorminated the bamboo growth.
出处
《竹子研究汇刊》
北大核心
1991年第3期38-48,共11页
Journal of Bamboo Research
