应用多重比较、相关性分析和线性回归分析等方法对猫儿山不同海拔(1145、1468、1536、2024 m)4种林分类型固定样地内表层土壤(0－20 cm)进行养分测定。结果表明：(1)土壤pH、全钾含量沿海拔梯度的变化呈现出单调递减的规律性；有机质、全氮、全磷和速效钾含量呈现先降后升的趋势；速效氮含量呈现先微上升后下降再上升的波形趋势；有效磷含量呈现强烈的先降后升的空间变异趋势。(2)海拔与有机质、全氮、速效氮、有效磷含量呈极显著正相关，与pH值和全钾含量呈极显著负相关，与速效钾含量呈显著正相关，与全磷含量之间的相关性不显著。(3)除了全磷外，有效磷含量与其它养分指标间呈显著或极显著线性相关。猫儿山土壤养分空间分布具有一定的异质性，有效磷的空间变化最强烈。%Surface soil (0-20 cm) were sampled from 4 stand types of permanent sampling plot at different altitudes(1 145 m, 1 468 m, 1 536 m and 2 024 m) of Maoer mountain, and their nutrient characteristics were measured. Multiple comparisons, correla-tion analysis and linear-regression analysis were used to analyze variation pattern of soil nutrients at different altitudes. The results showed as follows:( 1) Soil pH, total K were monotonic decreasing along the altitude gradient;soil organic matter, total N, total P and available K decreased and then increased;available N appeared a waveform change;available P had the strongest spatial varia-tion trend of first decrease and then increase. ( 2) Altitude was highly positively correlated with soil organic matter, total N, availa-ble N and P but negatively correlated with pH and total K. Altitude had a positive correlation with available K but was irrelevant to total P. (3) Except of total P, available P had significant or highly significant linear-correlation with other nutrients. There were spatial heterogeneity of soil nutrients in Maoer mountain, available P had the strongest spatial variation.
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