关键词: 牛, 牛, 子宫内膜上皮细胞, 组织块培养法, 纯化

Abstract:

The diameter-class structure of Casuarina equisetifolia L. southeast coastal protection forest population is analyzed by plots investigation and data statistics. In addition, the paper prepares the population specific life table, chart the mortality curve, risk curve and survival curve and analyses the population dynamics by the spectral analysis method that provide the theory basis for the protection and construction of coastal protection forests. The results show that the population has 2 peaks. The mortality rate is high in the earlier stage while stable in the later one. The IV age-class is the watershed of population survival curve. The survival curve trends to the type of Deevey-II. Moreover, the fundamental wave is not obvious during natural regeneration progress of the population but there is an evident bottleneck effect during the seedlings’ growing progress.