【摘要】 对渭北旱地苹果园中果树根区水平方向0~200 cm、垂直方向0~80 cm范围内土壤中镰刀菌数量的变化进行了采集研究分析,并结合盆栽砧木苗试验,观测不同根区土壤再植砧木生长发育状况。结果表明,镰刀菌数量随着离树干距离增加逐渐减少,而根区40~60 cm土层内镰刀菌的数量最多;重茬土中镰刀菌的数量明显高于大田,在重茬土中的砧木苗长势相对大田的弱,表现出重茬障碍的症状;镰刀菌数量多的根区盆栽砧木苗生长发育差,通过相关性分析可知,镰刀菌数量与再植砧木的生长发育存在一定的相关性。更多还原

【Abstract】 Change of Fusarium quantity in 0～80 cm layer of rhizosphere and far from the trunk 0～200 cm in Weibei dryland apple orchards was studied,combining with experiment of potted rootstocks seedling,to analyse Fusarium quantity effect on the growth of replanted plants in different rhizosphere soil.The results showed that Fusarium quantity got less and less with the increase of the distance from the trunk,while the maximal Fusarium quantity was in 40～60 cm layer of rhizosphere;Fusarium quantity in continuous cropping soil was more than that in the field.Potted rootstock seedling grew weak in continuous cropping soil.It appeared the symptom of replant disease;Potted rootstock seedling grew weak in rhizosphere with more Fusarium.There was certain correlation between Fusarium quantity and the growth of potted rootstock seedling through correlation analysis.更多还原