Abstract: This article aims at studying spatial distribution of soil nutrients,variability and nutrient correlation of six different forest types. The forest types include Black birch (Betula dahurica),birch (Betula platyphylla),Shanyang (Populus)tabulaeformis (Pinus),Mongolian oak (Quercus)and Acer mono (A.elegantulum).The result shows:1)The pH value of soil ranged from 5.04 to 6.47;the content of organic matter,available K,total N,alkaline hydrolysis N,total P is lowest in the tabulaeformis,while the content of available P is the lowest in Mongolian oak.In addition,the content has a decreasing trend with the increasing soil depth on the whole.2)The coefficient of variation of the pH value of the soil surface is 0.107,and the coefficient of variation of the other sectional level is less than 0.1,belonging to weak variability.The largest coefficient of variation soil ranged from 40 cm to 60cm in the indicators of soil nutrients.And the largest coefficient of variation of the available P belongs to strong variability.Other nutrient content layers present moderate variability.3)The pH,organic matter,total N,available N and available P between of them have a highly significant positive correlation.The available N,available P and total P also have a highly significant positive correlation .The pH value has a significant positive correlation with organic matter and available N.The total P has a significant positive correlation with organic matter and available K.The relation between available P,organic matter,total N,available N available K is obvious.

Key words: North Mountains of Hebei, forest soil, soil nutrient, coefficient of variation