【摘要】 以灵空山1 ha天然油松林为研究平台,通过野外收集器收集凋落物和室内分析实验的方法,分析灵空山油松林内凋落物物种组成、数量、空间分布等与油松幼苗空间分布的关系,揭示凋落物对油松幼苗所造成的影响,阐明凋落物不同组分之间与幼苗的空间分布关系.本研究参照拿马巴洛科罗拉多岛(Barro Colorado Island,BCI) 50 ha样地技术规范,在灵空山1 ha天然油松林长期监测样地内设置了11个种子收集器,从2014年9月到2016年12月,每15天收集掉落于收集器中的果实、种子及其相关附属物等.利用2年间收集的种子雨数据,主要结论如下:(1)收集器收集到的凋落物总重量为7.899 kg,其中叶凋落量最大,达到78.56%,收集到的凋落物树种共有10种,占样地树种数的35.7%.(2)油松幼苗在收集器周围半径10 m范围内的数量远多于半径5 m.(3)种子和果实的数量与幼苗的数量大致呈正相关,部分样地果实与幼苗呈负相关.(4)在11个凋落物收集器内,全部收集到凋落物,油松叶子存在于每个收集器中,其中的凋落物平均为682.42 g,其变异系数为0.29.(5)采用spss软件对凋落物不同的组分与幼苗进行pearson相关性分析,得出幼苗与油松叶、种子、果实有显著相关关系,凋落物中的树枝、树皮等附属物以及雄球花与幼苗空间分布无明显相关关系.更多还原

【Abstract】 The 1 ha in Lingkong Mountain Natural Pinus Tabulaeformis forest as the research platform, in order to clarify the different components of litter and seedling spatial distribution, method of collecting litter and analysis in the lab by the field of the collector, analysis in Lingkong mountain pine forest in the litter species composition, quantity, spatial distribution and the relationship between the spatial distribution of Pinus Tabulaeformis seedlings. Influence of litter of Pinus Tabulaeformis seedlings. This study reference Namabaluo Colorado Island(Barro Colorado Island, BCI) technical specification 50 ha plots, 1 ha monitoring in Lingkong Mountain Natural Pinus Tabulaeformis forest plots set up 11 seed collector long, from September 2014 to December 2016, were collected every 15 days to fall in the collector of fruits and seeds and its appendages. Using data collected from 2 seed rain, the main conclusions are as follows:(1) the total weight of litter collected into the 7.899 kg, the largest leaf litter, reached 78.56 %, collected a total of 10 litter species, accounting for 35.7 % of the total sample tree.(2) the number of Pinus Tabulaeformis seedlings in the radius of 10 m around the collector is much more than that of the radius 5 m.(3) the number of seeds and fruits was positively related to the number of seedlings, while the fruit and seedlings were negatively correlated in some plots.(4) litter was collected in 11 litter collectors, and the leaves of Pinus Tabulaeformis were found in each collector. The average litter was 682.42 g, and the coefficient of variation was 0.29.(5) of different litter components were analyzed by Pearson correlation analysis and seedlings by using SPSS software, the leaves, seeds, seedlings of Pinus Tabulaeformis and fruit was significantly correlated, in the litter branches, bark and appendages of male cones and seedling spatial distribution has no significant correlation.更多还原