论文部分内容阅读
为了解集约经营模式下,环境条件和自身密度法则对毛竹(Phyllostachys edulis)空间分布格局及其种群动态、品质与产量的影响,笔者在福建省永安市上坪山地长期集约性经营的毛竹林选择一块样地(40 m×15.5 m),对2008、2010、2012和2014年出土的毛竹进行区分,测定其空间位置,以异质性空间点格局分析方法重点研究2014年新竹相对于其余老竹的空间分布特点,同时测量了研究区域内毛竹个体的胸径,并采用广义可加模型分析了胸径在空间的分布类型是否呈现出随机化的特点。研究结果表明:毛竹在给定的距离尺度下表现为随机分布,同时毛竹胸径大小与毛竹的空间位置有关,毛竹分布的环境是异质性的,使用异质性空间点格局分析较为稳妥可靠。野外集约化经营模式下毛竹空间分布格局同样呈现出随机化分布的特点,而不是聚集性分布。毛竹在空间上出现是随机的,但是个体生物量大小的出现则与环境有关,提高毛竹产量和竹笋品质的关键在于改善土壤条件和选择毛竹的种植环境。
In order to understand the spatial distribution pattern of Phyllostachys edulis and its population dynamics, quality and yield under the intensive management mode, the authors selected the long-term and intensive management of Phyllostachys edulis in Phyllostachys edulis, A piece of plots (40 m × 15.5 m) was used to distinguish the bamboo from 2008, 2010, 2012 and 2014. The spatial location of the bamboo was determined. In this paper, Meanwhile, the DBH of individuals in the study area was measured and the generalized additive model was used to analyze whether the distribution of DBH in space is randomized. The results showed that the bamboo showed random distribution at a given distance scale, and the diameter of the bamboo at the same time was related to the spatial position of the bamboo. The distribution environment of the bamboo was heterogeneous, and the analysis of the spatial pattern of the heterogeneity was more reliable. Spatial distribution pattern of the bamboo under the field intensive management mode also showed the characteristics of random distribution, rather than the aggregation distribution. The appearance of bamboo in space is random, but the appearance of individual biomass is related to the environment. The key to improve bamboo yield and bamboo shoot quality lies in improving soil conditions and selecting the planting environment of bamboo.