枣庄市南部的平原中,黑土涝洼占一半以上。近年来,枣南平原的绿化造林成绩显著,但是黑土涝洼地上的林木却保存率低或“存而不长”。十四年的刺槐林,平均高仅7.6米,平均胸径5.3厘米,绝大多数成了“小老树”。这是枣南地区林业生产中急待解决的问题。 In the southern plain of Zaozhuang, black soil floods account for more than half. In recent years, the achievements of afforestation in the Zaonan Plain have been remarkable, but the preservation rates of trees on the black soil-water depressions are low or “not long”. Fourteen years of Robinia pseudoacacia, the average high of only 7.6 meters, the average diameter of 5.3 cm, the vast majority have become “little old tree.” This is an urgent problem to be solved in forestry production in Zaonan area.