林芝地区光核桃种群的年龄结构-林业工程学报.PDF

1 2* 2 方江平 , 钟政昌 , 钟国辉 ( 1. , 860000; 2. ) : 根据西藏林芝地区光核桃种群分布区内所选的几 个代表 地点定位观测资料, 通过 DPS 统计软件, 统计 0. 1673x 出光核桃年龄与基径的回归方程, 结果表明: 村庄光核桃种群年龄与基径的回归方程为 y = 31153 8e , 平均年 龄为 72. 14 a; 农田光核桃种群年龄与基径的回归方程为y = 1. 460 9x + 21750 6, 平均年龄为 591 15 a; 村庄光核桃种 0. 020 5x 群年龄与基径的回归方程为y = 28. 89e , 平均年龄为 68. 2 1 a村庄和农田型光核桃种群都处于衰退阶段, 荒 地光核桃种群处于从稳定型向衰退型过渡的阶段整 个林芝地区光核桃种群处于衰退状态, 在所有样地调查中没 有发现树龄小于 10 a的植株, 主要原因是人为干扰针对这种状况, 提出了 3 项资源保护措施: 人工育种合理开 发光核桃果实资源对光核桃的生理学和嫁接技术进行研究 : 光核桃; 年龄结构; 资源保护; 种群 TheAge Structure of TibetanP runus m ira Koehne Kov et. Kpsl Population in Tibet L inzhi RegionM FANG Jian -pin , ZHONG Zhen -chan , ZHONG Guo-hu i Abstract: In this paper, the re ression equations bewt een the a es and the base diameters ofP runus m ira KoehneKov et. Kpsl w ere analyzed by DPS based on the data from the three typical sites ofP runus m ira Koehne Kov et. Kpsl population in L inzh i re- 0. 167 3x ion of T ibet. The results show ed that the re ression equation of the populations w asy = 31153 8 e in the villa e site, and the avera e a ew as 72114 a. Wh ile in the farm land site, the equation was y = 11460 9x + 21750 6, and the avera e a e w as 0. 020 5x 59115 a. In thew asteland site, the equation w as y = 28189e , and the avera e a ew as 68121 a. The populations ofP runus m ira Koehne Kov et. Kpsl in