筇竹与黄皮树人工混交林中筇竹地上部分生物量模型构建

本研究以筇竹与黄皮树人工混交林中筇竹地上部分为研究对象，测定分析了1~4年生分株地上部分各构件生物量及含水率，建立人工筇竹分株地上部分各构件的生物量及总生物量模型，以期为人工筇竹林的经营管理及其碳汇项目的开发提供科学依据。结果表明：随着筇竹分株年龄的增加，各构件含水率和生物量均逐渐减少，筇竹1~4年生分株地上部分平均含水率分别为57.62%、53.40%、50.01%、42.66%，平均生物量分别为133.99、123.31、109.76、85.39 g/m²；各年龄分株地上部分生物量的分配均呈现出秆＞枝＞叶的变化规律。不同年龄分株的胸径与秆、枝、叶生物量及地上部分总生物量均有极显著相关性(P＜0.01)。以胸径为自变量建立的各年龄筇竹分株地上部分总生物量模型的决定系数(R²)均在0.93以上，具有较高的可信度，也有着较强的适用性，可用于类似立地条件下的筇竹分株生物量估测。

Construction of Aboveground Biomass Model of Qiongzhuea tumidinoda in Artificial Mixed Forest with Phellodendri chinensis

The study takes the aboveground part of Qiongzhuea tumidinoda in its artificial mixed forest with Phellodendri chinensis to measure and analyze the biomass and water content of each aboveground component of 1-4-year-old ramets, and establishes the biomass model for each component and the total biomass model of the aboveground part of artificial Q. tumidinoda ramets, in order to provide a scientific basis for the management of artificial Q. tumidinoda forest and the development of carbon sink projects. The results show that with the increase of ramet age, the moisture content and biomass of each component decrease gradually. The average moisture contents of aboveground parts of 1-4-year-old ramets are 57.62%, 53.40%, 50.01% and 42.66%, respectively, the average biomass are 133.99, 123.31, 109.76 and 85.39 g/m², respectively, and the distribution of aboveground biomass of ramets of all ages show the change tendency of culm>branch>leaf. The DBH of ramets at different ages is significantly correlated with the biomass of culms, branches and leaves and the total biomass of aboveground parts (P<0.01). The determination coefficient (R²) of the total aboveground biomass model of Q. tumidinoda ramets of all ages established with DBH as independent variable is more than 0.93, which has high reliability and strong applicability. The approach can be used to estimate the biomass of Q. tumidinoda ramets under similar site conditions.