闽粤栲人工林驯化栽培试验和生态系统生产力的研究

本文对闽粤栲驯化栽培环节中的采种、育苗、造林和抚育管理技术进行了探索试验,并用分层切割法测定样木地上部分各器官的生物量,用壕沟法测定地下部分根系的生物量。结果表明:10年生林分生物量为76.416t/ha,其中乔木层为76.061t/ha;净生产量为7.642t/ha·a(乔木层7.606t/ha·a),乔木层中树干(包括树皮)、枝、叶和根系的生物量分别为3.938,1.372,0.705和1.591t/ha·a。解析木数据表明:胸径、树高和材积速生期分别出现在7—22年间、4—14年间和从第11年开始,该林分尚属生长旺盛期。

Studies on the Domestication and Cultivation Trial of Castanopsis fissa Plantation and the Ecosystem Productivity

An exploratory trial of techniques of seed collecting, seedling rais-ing, afforestation and tending management in the links of domesticating and cul-tivating Castanopsis fissa Rehd et Wils has been conducted. The biomass ofabove-ground organs of samples was determined by the stratified cutting methodwhile the biomass of underground root system was determined by the ditchmethod. Results reveal that the 10-year-old stand biomass reaches 76. 416t/ha(of which the arboreous storey reaches 76.061t/ha) and the net productionreaches 7.642t/ha. y (of which the arboreous storey reaches 7. 606t/ha·y).Inthe arboreous storey, the biomass of stems (including barks). branches, leavesand roots accounts for 3.938, 1.372, 0.705 and 1.591t/ha·y, respectively.Analysis tree data show that the fast growing period of breast-height diameter,tree height and volume occur in 7-22 years, 4-14 years and from the beginningof the eleventh year, respectively and the stand is still in the stage of vigorousgrowth.