Spatial and temproal pattern of Seriphidium seedling in small-scale under two gradient degradation

Abstract

Abstract: Using survival test method to analyze survival rate of Seriphidium seedlings in SD (serious degradation) and HD (heavy degradation), there were not significant difference in the survival rate of seedling between SD and HD. using O-ring function and CIM (combining the data from individual mapped replicate plots into mean) technology to analyze spatial pattern of seedlings in small scale under two degraded gradation, the results showed that density function value decreases with increase in scale, the highest aggregation intensity reduce and that spatial scale of aggregation intensity climax increase from June to September, changing trend of aggregation intensity of seedlings in spatial and temporal is analogical under two degradation region, pattern of seedling emergence depend on maternal plant intensively, the maximum distance of seed dispersal is 50 cm respectively in SD and HD, scale of seedlings concentrative is about 5-30 cm, and dependence of seedlings on maternal plant increase in time scale. Convert distribution pattern of seedling to increase individual fitness in spatio-temporal scale.

CLC Number:

Q948.1

LU Wei-hua, ZHU Jin-zhong, JIN Gui-li. Spatial and temproal pattern of Seriphidium seedling in small-scale under two gradient degradation[J]. Acta Prataculturae Sinica, 2011, 20(5): 272-277.

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