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不同烤烟品种对根际pH的要求不同。经研究,NC89和S79-1属于适中性品种(pH6.5～7.5);NC82及中烟90则偏向于弱碱性(pH7.5～8.5);K326和红大偏向弱酸性(pH5.5～6.5)。烤烟品种对氮素吸收的最适pH与烟株生长的最适pH基本吻合,这与烤烟前期生长主要受氮素影响有关。另外,促进烤烟对P、K吸收的最适根际pH较形成最大生物量的pH偏低。
Different flue-cured tobacco varieties have different requirements on rhizosphere pH. According to the research, NC89 and S79-1 belonged to moderate variety (pH6.5-7.5); NC82 and Zhongyan90were weakly alkaline (pH7.5-8.5) ~ 6.5). The optimal pH of flue-cured tobacco varieties for nitrogen absorption basically agrees with the optimum pH for tobacco plant growth, which is mainly related to the effect of nitrogen on the growth of flue-cured tobacco. In addition, the optimum rhizospheric pH for fumigation uptake of P and K was lower than that of maximum biomass formation.