建平地区油松人工林天然更新影响因子的研究

The Factors Influencing Natural Regeneration of Pinus tabulaeformis Plantation in Jianping District

在全面踏查的基础上选择3种典型林型样地对建平地区油松人工林天然更新苗进行了研究,结果表明:裸岩油松林中林下油松幼苗最少,禾草油松林林下更新幼苗最多,山杏油松混交林次之;阳坡林窗内及边缘幼苗少,而阴坡条件下幼苗较多;裸岩油松林幼苗组成结构最为单一,山杏油松林最为复杂,禾草油松林次之;林下地被物的厚度对幼苗的发生与生长也有影响,地被物越厚,更新苗越少,地被物稀少,幼苗越多。

Based on the overall on - the - spot survey, the natural regeneration seedlings of Pinus tabulaeformis plantation of three typical forest types have been studied. The results show that the order of the amount of young seedlings of Pinus tabulaeformis is the Pinus tabulaeformis forest in grass 〉 the one in mixed forest of Pinus tabulaeformis and Prunus sibirica 〉 the one in bare rock. There are a small amount of young at the edge of forest gap in sunny slope, and a big amount of yound seedlings seedlings in shady slope. inside forest gap and The young seedlings in the Pinus tabulaeformis forest in bare rock is in a single structure, with the most complex structure in mixed forest of Pinus tabulaeformis and Prunus sibirica. The thickness of ground cover can influence the occurrence and growth of the young seedlings. There is a smaller amount of young seedlings in the land with thicker ground cover, on the contrary, there is a bigger amount of young seedlings in the land with poor ground cover.