黄甜竹地下茎生长规律研究

Growth Law of Subterraneous Stem of Acidosasa edutis Wen

通过对黄甜竹地下茎的生物学特性即竹鞭年生长规律、竹鞭垂直分布与水平分布、竹鞭芽变化规律及竹鞭根系生长规律的研究,结果表明：竹鞭延伸生长量与温度关系密切,一年中鞭笋生长量随着月均温的升高而加大,7-8月达到最大,到12月冬季来临进入休眠;11-30 cm土层是竹鞭分布最多的土层,且竹鞭量在中坡分布最多;2-3龄鞭壮芽数、笋芽数最多,转化为笋及鞭也多。1-4年生竹鞭都具有支根且根萎缩后具有再生能力,5年生竹鞭根萎缩后没有再生能力。

The biology characteristics of subterraneous stem of Acidosasa edutis were studied, namely, the yearly growth law, vertical and horizontal distribution, variation of bamboo bud and growth law of bamboo rhizome. The results indicate that the radial growth of bamboo rhizome and the temperature have dose relations. Radial growth enlarges along with the increasing of average temperature of the month, achieves largest from July to Aug. and enters the dormancy when approaches to Dec, the bamboo rhizome quantity are most under the topsoil of 11-30 cm, especially in the center slope. Bamboo rhizome at 2 - 3- year-old have the most bud, correspondingly have many transforms for the bamboo shoot and bamboo rhizome. Bamboo rhizome at 1 - 4-year-old all have rootlets which can reproductive after shrinking,but it does not happened in the 5a bamboo rhizome.