不同地类对日本落叶松生长的影响

Effects of Different Site Types of Growth for Larix kaempferi

通过对不同地类日本落叶松生长情况的调查,结果表明:不同地类更新日本落叶松效果差异较大,选择残次林皆伐迹地和退耕地更新日本落叶松效果较好,成活率在95%以上,保存率在85%以上,更新10年后胸径和树高年均生长量比落叶松皆伐迹地提高23%和31%。标准木达到73.8%,是更新造林较理想的迹地类型;落叶松皆伐迹地更新日本落叶松,其成活率、保存率、年均生长量、土壤的养分含量等均较低,所以不宜提倡。

Growth of Larix kaempferi with different site types was investigated.Result shows that:the difference of Larix kaempferi with different site types are significant;regenerating Larix kaempferi on cutting-blank of residual stands and abandoned lands can obtain the optimal effect,the survival &preservation rate of which is above 95% &85%,respectively,and the DBH &annual tree height of which increases by 23% & 31% respectively regenerated after 10 years.The standard trees reach 73.8%,which are the ideal site types;the survival rate,preservation rate,the annual average growth & nutrient content of the soil of Larix kaempferi regenerated on cutting-blank for larch are all low,it should not be advocated.