【摘要】 应用果园调查、土壤植株分析与大田钾肥施用量试验相结合的方法 ,对银杏钾素营养诊断技术进行了研究。结果表明 :土壤钾素以土壤速效钾作为诊断形态 ,其诊断指标 (mg/kg)为 :高〉75 0 ,中5 0 1～ 75 0低 ,<5 0 1。银杏植株钾素营养诊断最佳诊断时期为 7月 ,最佳诊断部位为长支条倒 8位叶。诊断形态为叶片全钾 ,其诊断指标 (% )为 :高 >0 95 8,中 0 818～ 0 95 8,低 <0 818。更多还原

【Abstract】 Using the way of joining the investigation in the orchard, the chemical analysis on soil and plant to the experiment of applying amount of the potassium fertilizer in the fields, a technique of the nutrition diagnosis of potassium in Ginkgo biloba L trees was researched The result showed that the potassium in soil should be the rapid available potassium as the diangnostic fom Its diagnostic mark(mg/kg)were>75 0(high),50 1～75 0(mid),<50 1(low),respectively The best diagnostic period was in July The best position of potassium nutrition diagnosis in Ginkgo biloba L Plant was in the 8-th leaf of reverse order in the long branch The diagnostic mark(%)-high;>0 958, mid:0 818～0 958,low:<0 818更多还原