砂和珍珠岩混合无机基质在烤烟漂浮育苗的应用

为寻求可替代草炭、使用简便的烤烟育苗基质,采用不同配比的砂和珍珠岩混拌进行育苗试验。结果表明,适宜配比的砂和珍珠岩混合无机基质可满足烟苗出苗和生长发育的要求。适宜的混配比例(体积比)为砂20%～40%,珍珠岩80%～60%,最优组成是30%砂+70%珍珠岩,所培育的烟苗出苗率达95%以上,螺旋根发生率低于2%,成苗率大于93%,与对照无显著差异,壮苗率高于对照,育苗成本降低45.18%～47.50%,经济效益明显,可完全替代常规漂浮育苗的草炭基质。

Effect of Sand and Perlite Mixture on Tobacco Seedlings with Float System

To explore the suitable substitutes for the conventional peat media in tobacco seedling float system. Seedling cultivation tests were conducted to select suitable inorganic media with different proportions of sand and perlite. The results showed that, the characteristics of the seedlings, including germination rate and seedling growth, were better than those from the conventional float system. No significant difference was observed on the overall quality of seedlings, such as water absorbency, seedling emergence, and seedling quality, between the new media of sand and perlite mixture and the conventional float system. Moreover, this method could reduce the production costs by 47% comparing with the conventional float system. The optimal proportion for sand: perlite was 20%-40%, 80%-60% by volume. The best sand: perlite ratio was 3:7. It can substitute the conventional peat media without changing the regular floating system.