【摘要】 应用果园调查与大田磷肥试验相结合的方法 ,对银杏磷素营养诊断技术进行了研究。结果表明 :银杏土壤磷素营养诊断可以土壤速效磷作为诊断形态 ,7月份诊断指标 (mg/kg- 1 )为 :高 >1 4.0 ,中 9.8～1 4.0 ,低 <9.8。银杏植株磷素营养诊断最佳诊断时期为 7月 ,最佳诊断部位为长枝条的倒 8位叶 ,以银杏叶片全磷作为诊断形态 ,其诊断指标 (% )为 :高 >0 .3 2 9,中 0 .2 65～ 0 .3 2 9,低 <0 .2 65。更多还原

【Abstract】 By taking the way of combination of investigation and testing,we researched the nutrition diagnosis technique of phosphorus in Gingko biloba L The results indicated that the diagnosis of soil nutrition of phosphorus could take the available P of soil as the way of diagnostic form,the standards of diagnostic (mg/kg) were high >14 0,mid 9 8～14 0,low <9 8,the best nutrition diagnostic period was in July,and the optimum disgnostic position was the 8th leaf of reverse order in the long branch By taking this leaf of P as the diagnostic position,the diagnostic indexes (%) were high 0 329,mid 0 265～0 329,low <0 265更多还原