银杏幼树黄化的土壤原因及对策研究

A study on young Ginkgo plants etiolation and the countermeasures

通过果园调查、盆栽试验、大田验证试验及室内化验分析 ,找出银杏幼树黄化的主要原因是 :土壤有效养分缺乏 ;p H低、酸度大 ;有效铝含量高 ,存在铝毒危害。并提出了相应的防治措施 :即施用 N、P、K、石灰、有机肥、B、Zn肥料 。

According to the vestigations in orchard, pot experiments, field verifying experiments and indoor chemical analysis, we found that the main etiolating cause for young Ginkgo biloba L. plants was the lack of effective nutrients in soil,low pH value,high acidity,high active aluminium content,and the existence of aluminium toxicity.Corresponding preventive measure is provided in this paper, that is applying N?P?K fertilizer, lime, organic fertilizer, and B, Zn chemical fertilizers.