优良经济竹种红竹生物量的研究

STUDY ON BIOMASS OF FINE ECONOMIC BAMBOO SPECIES PHYLLOSTACHYS IRIDENSCENS

对设置在安吉竹种园的红竹林试验样地进行了生物量测定。红竹1～5年生秆、枝和叶的平均含水率分别为50.4％、44.1％和53.8％。秆、枝和叶均以基部含水率最高,向上逐渐减小。其各自的生物量占地上部分总生物量以秆为最高(达70.3％～79.3％),叶最小(仅占6.5％～12.1％)。竹秆的生物量分布中心集中在秆基部,向梢部锐减,而枝和叶集中在分枝中部。地下部分生物量和竹林凋落物生物量占竹林总生物量分别为16.7％和8.9％。红竹林生物量地上和地下部分分配格式和疏林与灌丛生态系统相吻合。

A series of tests in experimental stand of Phyllostachys irident-cent in Anji Bamboo Botanic Garden showed that the mean moisture content of the culm, branches and leaves of l-5 years old PA. iridenscens were respectively 50.4%, 44.1% and 53.8%. That of culm, branches and leaves in the same bamboo was the highest at the base of the organs, then decreased gradually upwards. The highest percentage of biomass of different organs of the plant above ground was found in stem by 70.3%-70.9% while the least was in leaves by 6.5%-12.1%. The distribution center of biomass concentrated at the base of the stem and decreas ed sharply toward the tip. Twigs and leaves gathered at the middle of the branches. The biomass of underground part of Ph. iridenscens and that of the litter were 16.7% and 8.9% respectively. Distribution type of the biomass of aboveground part versus underground part in Ph. iridenscens forest was identical with that of sparse woods and bush ecological system.