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本文研究了攀枝花山地两个高山栲低密度种群的种子雨模式和种子雨动态,并讨论了种子产量、种子存留和种子对幼苗建成的贡献。研究结果表明:(1)种子雨持续时间超过两个月,但种子下落的高峰期存在样地间差异;(2)该地区高山栲的种子产量很低,种子雨散落的密度不大(样地1和样地2的密度为2.3个.m-2和2.8个.m-2)。(3)在种子雨过程中,地表种子库各组成的动态不同,霉烂种子和萌发种子为零,完好种子和虫蛀种子有轻微的波动,完好种子的存留密度为0.13个.m-2;和它们相反,地表的壳斗和败育种子存在积累效应。(4)动物捕食是地表种子损失的主要原因,样地1和样地2分别占91.3%和97.83%,地表种子的存留率仅为8.7%和2.17%。(5)研究样地的高山栲种群低的种子生产量、地表种子存留率和幼苗建成困难等三个环节都限制了高山栲种子途径的种群更新。
In this paper, the seed rain patterns and seed rain dynamics of two populations of Pinctada total in the mountainous area of Panzhihua were studied. The effects of seed yield, seed storage and seeds on seedling establishment were also discussed. The results showed that: (1) the duration of the seed rain lasts more than two months, but there is a difference between the sampling plots at the peak of the drop of the seed; (2) the seed yield of the mountain polonium is very low and the density of seed rain is not scattered The density of Land 1 and Land 2 was 2.3 m-2 and 2.8 m-2). (3) During seed rain, the composition of surface seed banks varied dynamically, the number of mildewed and germinated seeds was zero, and the seeds of intact seeds and moth borers fluctuated slightly. The density of intact seeds was 0.13 m-2. Contrary to them, there is a cumulative effect on the surface shell and abortion seeds. (4) Predation of animals is the main reason for the loss of surface seeds, with plots 1 and 2 accounting for 91.3% and 97.83% respectively, while the surface seed survival rate is only 8.7% and 2.17%. (5) The low seed production, population retention of surface seeds and seedling formation difficulties in the highland population of the study site all restricted the population updating of the alpine gall seed path.