以四川长宁县为研究对象，选取毛竹、硬头黄竹和苦竹为长宁县代表竹种，采用随机抽样方法布点，对毛竹、硬头黄竹和苦竹分年龄、径阶进行了生物量调查，分析了竹林各器官生物量在年龄上的分布并通过建立年龄、直径与生物量的关系模型以及模型的精度检验选取毛竹、硬头黄竹和苦竹的最优生物量模型。结果表明：竹各器官地上部分生物量大小排序为：竿＞枝＞叶，毛竹生物量在年龄上的分布为：3年龄＞2年龄＞1年龄；硬头黄竹各器官地上部分生物量大小排序为：竿＞枝＞叶，硬头黄竹生物量在年龄上的分布为：3年龄＞2年龄＞1年龄；苦竹各器官地上部分生物量大小排序为：竿＞枝＞叶，苦竹生物量在年龄上的分布为：3年龄＞2年龄＞1年龄。毛竹生物量模型：W ＝0．581×（A × D × D）0．617，硬头黄竹生物量模型：W ＝－5．548＋2．032× D ＋0．544× A ，苦竹生物量模型：W ＝－1．845 ＋0．723× D ＋0．478× A 。%With Changning County ,Sichuan as the research object ,weselected Phyllostachysedulis ,Bambusa rigida and Pleioblastus amarusas representative bamboo species in Changning County .Using random sampling method to in‐vestigate the biomass of Phyllostachysedulis ,Bambusa rigida and Pleioblastus amarusin respects of age and diameter classes .We analyzedthe agedistribution oforganbiomassin bamboo forest .Through establishingthe relational modelof age ,diameterand biomassandcarrying outaccuracy test of the ,model ,we selectedthe optimal biomass models ofthe threespecies .The conclusions are as follows :The abovegroundbiomass rank of the organswas :rod > branch > leaf , and the age distribution of Phyllostachys edulis biomass was :triennial > biennial > annual .The abovegroundbiomass rank of the organs of the Bambusa rigidawas :rod > branch > leaf ,and the age distribution of Bambusa rigidabiomass wastriennial > biennial > annual .The abovegroundbiomass rank of the organs of the Pleioblastus amaruswasrod >branch > leaf ,and the age distribution of Pleioblastus amarusbiomass wastriennial > biennial > annual .2 .The optimal models of the unit biomass of the bamboo forests are selected .Phyllostachys edulis :W = 0 .581 * (AD2)0 .617 ;Pleio‐blastus amarus :W = - 5 .548 + 2 .032 * D + 0 .544 * A ;Bambusa rigida :W = - 1 .845 + 0 .723 * D + 0 .478 * A .
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