辽东半岛结缕草群落分类及生态的研究

本文用群丛表法和群落数量分类法以东半岛的结缕草群落进行分析，把该地结缕草群系划分四个群丛，分别是：结缕草群丛，结缕草＋矮丛苔草群丛，结缕草＋矮丛苔草－花木蓝灌草丛和结缕草＋矮丛苔草＋多年生杂类草群丛，并讨论了这些群丛的种类和生活型组成，群落结构和生物量垂分布等订特征。用主分量分析法（ＰＣＡ）对５８个样地进行排序，经分析得出：群落草本层受光率和土壤有机质含量是决定群落类型主自然生态因子。相关分析的结

STUDIES ON THE CLASSIFICATION AND ECOLOGY OF ZOYSIA JAPONICA COMMUNITY INH LIAODONG PENINSULA

This paper makes close analysis, using formation bable method and quantitative classification method, on the materials obtained from the field investigation of Xiuyan County, Liaodong Peninsula. The Zoysia japonica Formation in this area can be divided into four types of associations, namely, Ass. Zoysia japonica Ass. Zoysia japonica Carex nanella. Ass. Zoysia japonica Carex napella Indigofera kirilowii, and finally Ass. Zoysia japonica Carex nanella Perennial forbs. This paper discusses into details of the component of species and their life-form, the structure of community and the vertical distribution of biomass of these associations. The principal component analysis (PCA) shows that light intensity in grassy layer of community and the content of organic matter in soil constitute the main natural ecological factors that affect the formation of the associations. The correlative analysis further reveals that the light intensity in grassy layer is positively correlative with aboveground biomass and ear sprouting rate of Zoysia japonica. the organic matter content in soil is negatively correlative with them. The paper also describes the succession law of Zoysia japonica commnunity. It points out that human activity plays very important roles in this succession. proper period and intensity for pasturing, mowing and seed-harvesting will be helpful to make full uses of Zoysia japonica resources.