大通退耕地植物群落植冠层截留性能和枯落物容水性能研究

Rainfall Interception Capability of Canopy Layer and Water-holding Capability of Litter of the Plant Community in Returning Farmland to Forest Project in Datong County

通过对青海省大通县退耕还林人工林标准地调查和分析,研究了青海云杉、华北落叶松、沙棘、白桦、青杨等植物群落的降雨截留量和枯枝落叶层容水量。结果表明,植物群落植冠层截留量随退耕年限的延长而增大,青海云杉群落植冠层截留量与退耕年限之间呈线性相关;青海云杉乔木层与群落植冠层截留量呈幂函数相关;枯落物容水量与林龄、枯落物厚度、枯落物干重相关性极显著。

Based on the investigation of sample Farmland to Forests Project in Datong County, plots and analysis of the plant community in Returning the authors studied the hydrological effects of Picea crassifolia , Larix principis-rupprechtii , Hippophae rhamnoides ssp. sinensis, Betula platyphylla , Populus cathayana. The results indicated that the rainfall interception amount of the plant canopies increased with the increase of converting years. The rainfall interception amount of P. crassifolia showed liner correlation with the converting years. The relationship between the rainfall interception amount of tree canopies of P. crassifolia and the plant canopies of the plant community was in accordance with power function correlation. The relationships between the water-holding capacity of litter, ages, the thickness of litter layer, accumulation of litter were in accordance with significant correlation.