摘要
对春夏季水曲柳落叶松纯林与混交林根际土壤的ｐＨ值变化进行了研究．结果表明：各季除水曲柳纯林 根际上ｐＨ值略高于非根际土外。其它林分ｐＨ值均低于非根际土。ｐＨ值大小顺序为：水曲柳纯林根际土 ＞非根际土＞混交林根际土＞落叶松纯林根际土。水落纯林根际土壤ｐＨ值差异显著．而混交林中二者差异较小。 从春到夏．纯林和混交林中的水曲柳根际上ＰＨ值有所下降，而落叶松根际土ｐＨ值有所上升．总体上混交林变化幅 度大于相应纯林。说明混交改善了纯林状态下的根际土壤酸度．因而促进了林木生长。并探讨了ｐＨ值变化的原因。
The pH changes in rhizosphere soil of pure ash or larch forests and mixed forests in spring and summer were studied. The results showed that the pH values of rhizosphere soil in spring and summer are lower than those of nonrhizosphere soil in most types of forest except that the pH value of pure ash soil is a little higher than that of nonrhizosphere soil. pH value of rhizosphere soil decline in the order of pure ash stand>nonrhizosphere soil >mixed stand>pure larch stand. The difference of pH between ash and larch in pure stand is more remarkable than that in mixed stand. From spring to summer. the pH value of rhizosphere in pure or mixed ash stand goes down, while it goes up in pure or mixed larch stand. In general. mixed forests change greater than corresponding pure stand. It proved that mixed plantation change the pH of rhizosphere soil in pure stand, consequently promotes the growth of mixed stand. In the meantime. the reasons why pH changed are discussed.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2001年第2期102-104,共3页
Journal of Northeast Forestry University
