【摘要】 为探究大金山岛土壤有机质和全氮的季度性变化、空间变化特征及其相关性,分4个季节共采集146个土壤样品.结果显示,大金山岛土壤有机质较为丰富,含氮量较高,其全年均值分别高达9.04%、4.52 g·kg-1,与2002年所测数据相比较,有机质含量(9.01%)几乎未变,全氮含量(6.89 g·kg-1)有所降低;变异系数在33.9%～49.7%之间,属于中等变异程度;季度性差异较为明显,夏季低,冬、春两季高;北坡(阴面)>南坡(阳面).大金山岛土壤中有机质和全氮的分布呈现偏正态分布;有机质与全氮之间呈显著的正相关(0.01水平),Pearson系数为0.778.C/N的比值接近25,有机质含量和全氮含量均富足.更多还原

【Abstract】 In order to explore the characteristics of the seasonal variation,spatial distribution and correlation of SOM and TN in Big Jinshan Island soil,samples from 146 sits in topsoil were collected during August in 2011 to August in 2012 and analyzed.The results showed that the contents of SOM(9.04%) were relatively high in general,virtually unchanged from the data of 2002(9.01%).The contents of TN(4.55 g·kg-1) were lower than in 2002(6.89 g·kg-1).The coefficients of variation(CV) of SOM and TN were 33.9%～49.7%.Seasonal difference was more obvious,and was the lowest in summer,and highest in winter and spring;SOM and TN contents in the samples from the north slope were higher than south slope.The organic matter and TN in surface soil showed a normal distribution,the correlation between them was remarkably positive(R = 0.778,P < 0.01).The ratio of C / N was close to 25,indicating rich organic matter and nitrogen.更多还原