以河北省木兰围场国有林场白桦林为研究对象,分析不同抚育方式对林木生长和土壤理化性质的影响。结果表明:1) 胸径。传统经营对胸径生长没有影响,均质经营4年后显著高于对照。2) 树高。对树高生长没有影响。3) 冠幅。2年时均质经营>传统经营>对照,都显著;4,6年时二者仍显著高于对照,但二者之间差异不显著。4) 蓄积年平均生长量。2年内差异不显著,4,6年后均质经营显著高于传统经营和对照。5) pH值。在0~20 cm和20~40 cm的土层,都是差异不显著。6)在0~20 cm的土层,有机质含量、碱解氮含量、有效磷含量、速效钾含量都是均质经营>传统经营>对照,差异显著。在20~40 cm的土层,速效钾含量没有差异;碱解氮含量是均质经营>传统经营>对照,差异显著;有效磷含量是对照>传统经营>均质经营,差异显著;机质含量为均质经营显著高于传统经营和对照,但传统经营和对照没有差异。

This paper analyzed the effects of different tending methods on the tree growth and soil physicochemical properties in birch forest,based on a research conducted in a birch forest of Hebei Mulan Weichang State-owned Forest Farm.The results showed that:1)Effects on DBH:No significant difference between UM and CK,while the effect of quality management(QM)was significantly higher than the CK after 4 years.2)Effects on tree height:There was no significant difference on tree height growth.3)Effects on crown width:QM>UM>CK after 2 years,significantly;QM and UM both were significantly higher than the CK after 4 and 6 years,but there was no significant difference between QM and UM.4)Effects on average annual volume growth:No significant difference among QM,UM,and CK after 2 years.However,QM was significantly higher than UM and CK after 4 and 6 years.5)There was no significant difference of effect on PH value in 0~20 cm and 20~40 cm soil layers.6)In the 0~20 cm soil layer,the content of organic matter,alkali-hydrolyzed nitrogen,available phosphorus,and available potassium were all QM>UM>CK,with significant differences.In the 20~40 cm soil layer,there was no difference in the content of available potassium;the content of alkali hydrolyzed nitrogen was QM>UM>CK,with significant differences;effective phosphorus content was CK>UM>QM,with significant differences;the organic matter content of QM was significantly higher than that of UM and CK,but there was no difference between UM and CK.