在缺乏水分的地区,有关根系构造的资料对造林工作十分重要。苏联莫尔达维亚南部是典型的气候干燥地区。当地地形起伏,地下水位一般深于15—20米。土壤为一般的壤质黑钙土。作者为了了解橡树与核桃在具体生长条件下的根系构造、根系随年龄所发生的变化及根系与其它伴生树种根系间的相互关系,进行了本项研究工作。研究根系所采用的方法是一般的开沟法。为了计 In regions where water is scarce, information on the root system is important for afforestation. Southern Moldavia, the Soviet Union, is a typical dry climate. The local terrain ups and downs, the groundwater level is generally deeper than 15-20 meters. The soil is a general loamy black earth. In order to understand the root architecture of oak and walnut under specific growth conditions, the change of root system with age and the relationship between the root system and other root systems of associated species, this research work was carried out. The method used to study the roots is the usual ditch method. In order to count