环境因素对芦苇地上部生物量影响的灰色分析

The grey analysis of effects of enviorment factors on aboveground biomass of Phragmites communis

用灰色系统分析方法 ,对影响芦苇地上生物量的环境因素进行了定量分析 .结果表明 ,在 7种环境因素中 ,土壤含水量、水解氮、月平均气温、速效钾有较大的灰色关联度 ,而土壤pH值、有效磷、活性有机质的灰色关联度较小 .根据灰色分析结果 ,建立了芦苇地上部生物量的回归模型Y =1 0 81 64 8-4 2 9 50 9X2 + 1 0 5 94 8X6 -2 1 2 3 9X8,R =0 91 4.

In this paper,the enviorment factors affectting the aboveground biomass of Phragmites communis were studied by grey system analysis.The result sehows that among seven enviorment factors ,the content of soil water ,hydroiyted nitrogen,average air temperature in a month and quick acting potassium keep a higher grey connection degree,whereas soil pH value,effective phosphorus and active organic matter keep a lower grey connection degree with the aboveground biomass of Phragmites communis was also established.Tlhe modelis:Y=1 081 648-429 509 X 2+105 948X 6-21 239X 8,R=0 914.