Influence of excessive biotic pressure and fire on culm diameter, density flux and seed production in Melocanna baccifera stands

过度生物干扰和火烧对梨竹林茎秆直径、密度及种子产出的影响(英文)

A study was conducted to investigate culms density and size, seed size and production rate in Melocanna baccifera stands disturbed by biotic pressure and fire. Results revealed that culms density, number and size of seeds produced in the bamboo stands were significantly affected by frequent fire and excessive biotic pressure （collection of young shoots for vegetables and mature culms）. The culm density and seed production rate decreased significantly in the stand subjected to excessive biotic pressure. An increasing exposure of culms to sun light was responsible for the above decrease. Seed production rate significantly increased in case of culms subjected to fire in comparison to the control. It indicated that fire stimulated the seed production in M. baccifera stand.

本文调查了梨竹林在生物胁迫和火烧干扰下茎秆密度和大小,种子大小及产出率。结果表明:频繁的火烧或生物干扰会显著影响竹茎秆密度,种子产出数及大小。过度生物干扰显著降低竹茎秆密度和种子产出率,这与茎秆过多地暴露在阳光下有关;但火烧却明显增加了种子产出,暗示火烧对Melocanna baccifera 林种子产出有促进作用。