【摘要】 经过调查与研究表明:黄土丘陵沟壑区目前人工混交林有25种混交模式,4种混交类型,即针阔混交、针叶混交、阔叶混交以及乔灌混交等。各种混交林的生长发育、抗逆性及生态功能等均优于纯林。本文提出了各种混交林的混交方式、混交比例、营造方法等,可供有关方面造林绿化和退耕还林时参考。更多还原

【Abstract】 According to results of investments and studies,there are 4 types of mixed forests in hilly and gully rolling region of loess plateau,including 25 models.The growth,the ability of resisting adversity and the zoology function ect.of mixed forest are all superior than pure one.This paper brings forward the mode,the proportion and the ways of mixed forest constructing,which provides reference to forestation.更多还原