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早期播种时调酸和消毒及二者的互作对苗质的影响较强,随播期推迟其影响减弱,从回归分析中可以找出北京地区不同播期的调酸与消毒的最佳值。苗期有效积温和盘土 pH 呈正相关。直接向盘土喷酸化水代替常规调酸的简化调酸技术证明是可行的。
In the early sowing, the acidity and disinfection and the interaction between the two had a strong influence on the quality of the seedling. The influence of the sowing time on the seedling quality was weakened as the sowing date was delayed. From the regression analysis, the optimum values of acidizing and disinfection for different sowing date in Beijing could be found out. The effective accumulated temperature at seedling stage was positively correlated with the pH of tray soil. Simplified acidification techniques that directly spray acidified waters to soil instead of conventional acids proved to be viable.