绿竹地下茎发笋生物学特性研究

对绿竹地下茎生物学特性即竹蔸秆基芽目萌发规律、蔸根芽点发根规律及竹丛蔸幅与发笋量的关系研究表明：各母竹的笋目数量变幅为3～10个，多数为5～9个，不同径阶绿竹母竹的秆基笋目数量不同，与径阶呈正相关；秆基笋目从2月开始萌发，3—5月为萌发高峰期，6月以后基本停止萌发；绿竹在6年生以后，整个母竹根系进入老化期；竹丛蔸幅和发笋量呈显著正相关，用Y=0．0424X^2-1．7755X＋28．961拟合绿竹竹丛蔸幅和发笋量之间的关系较适宜．

Study on Rhizome Shooting Biological Characteristics of Bumbusa oldhami

The biological characteristics of Bumbusa oldhami rhizome regarding to the sprouting rules of large-bud on culm base,the rooting laws of the culm base and the relationship between culm base size and shooting quantity of this bamboo species were studied.It was showed by the results that the numbers of shooting buds of each mother bamboo ranged from 3 to 10,and the majority ranged from 5 to 9.The amount of large-buds on culm base of mother plants was positively correlated with culm diameter classes.The large-buds on the culm bases began to sprout from February,and the sprouting peak time appeared between March to May,and the sprouting ended after June.The whole root system of B.oldhami entered ageing period six years after being planted.There was significantly positive correlation between culm base size and the shooting quantity,The regressive equation between these two factors was expressed as Y= 0.042 4 X2-1.775 5 X 28.961.