摘要
本试验结果表明 ,在整个果树生长期内 ,覆盖可明显增加各土层中细菌的数量 ,0～ 2 0 土层中 ,年平均细菌数量 ,增加 82 1 2 % ;2 0～ 40 土层中增加 2 33 6 9% ,40～ 6 0 土层中增加 1 4 4 80 %。不同土层细菌数量年变化曲线 ,无论覆盖与对照 ,均呈单峰曲线变化 ,高峰出现在
The results of the study showed that:The contents of the soil bacteria in each soil layer were increased significantly by covering during the whole growing period of the fruit trees Among 0～20 soil layer the annual average contents of the bacteria were increased 82 12%, increased 233 69% among 20～40 soil layer, increased 144 80% among 40～60 soil layer The variations of the bacteria contents in each soil layer were unimodal distribution The peaks appeared in August
关键词
果园
覆盖
细菌
土层
Orchard
Covering
Bacteria
Soil layer
