撑篙竹生物量的研究

The Biomass Distribution Pattern of Bambusa pervariabilis

以撑篙竹林作为研究对象,研究撑篙竹生物量分配规律,为竹林经营和竹材利用提供理论依据。通过采挖竹蔸、砍伐立竹,每竹检尺、分段称重,分析竹秆鲜重与胸径、高度之间的相关性,分析每段竹秆鲜重的分配,以及竹蔸、竹秆、枝梢以及竹叶分配规律。结果单株竹秆鲜重(W/kg)与胸径(D/cm)、高度(H/m)之间的最优回归方程为W=0.122 DH+0.001(DH)^2(R^2=0.992);单株鲜重与胸径的最优回归方程为W=0.199 D+0.358 D^2(R2=0.985)。竹蔸的重量占了全株的6.29%,竹秆重量占72.96%,第1~5秆段鲜重依次减少,竹叶份量最少,占全株重的3.65%。各器官以及竹秆各段重量分配规律可供撑篙竹秆合理利用作科学参考。在竹林生产经营中,可利用胸径、高度及采伐量预测竹林产量,同时可以通过秆重估算竹蔸、枝梢叶的生物量。

The biomass distribution of Bambusa pervariabilis was studied to provide a theoretical basis for its management and utilization.After cutting down the bamboo and excavation of the bamboo stump,each bamboo was measured and weighed by section,the correlation between the fresh weight and DBH and height of bamboo was analyzed.The fresh weight distribution of various bamboo culm sections,and that of various bamboo organs,including stump,culm,branches and leaves,were analyzed too.The results showed that the optimal regression equation between the fresh weight(W/kg),DBH(D/cm)and height(H/m)of individual bamboo culm was W=0.122 DH+0.001(DH)2(R2=0.992),and the optimal regression equation of fresh weight and DBH was W=0.199 D+0.358 D2(R2=0.985).The weight of bamboo stump and culm were respectively 6.29%and 72.96%of the whole plant.The fresh weight of the 1~5 sections decreased successively,bamboo leaf weight was the least,accounting for 3.65%of the whole plant weight.The weight distribution law of each organ and each section of bamboo culm can be used as scientific reference for rational utilization of the bamboo.The yield of bamboo forest can be predicted by DBH,height and cutting amount,and the biomass of bamboo stump,shoot and leaf can be estimated by the culm weight.