不同浓度NaCl对矮牵牛穴盘苗生长发育的影响

[目的]研究NaCl对矮牵牛(Petunia hybrida Vilm)穴盘苗生长发育的影响,为我国大规模穴盘苗生产提供理论指导。[方法]NaCl浓度分别为0(CK)、0.25、0.50、1.00、1.25、1.50 g/L,测定矮牵牛地上、地下部鲜重等生长发育指标。[结果]低浓度NaCl有助于矮牵牛的养分吸收。其中,0.50、1.00 g/L NaCl处理的植株长势最好,并显著优于对照。虽然1.25、1.50 g/L NaCl处理植株生长也优于对照,但明显不如0.50、1.00 g/L NaCl处理。通过测定基质EC和基质中的养分含量发现,通常的穴盘苗基质具有对盐分的缓冲能力,基质EC受其影响不大,但对基质中的大量元素养分含量影响显著。[结论]一定低浓度盐分有助于穴盘苗的生长发育,符合要求的城市废水可直接用于园林幼苗培育。

Effects of Different Concentration of NaCl on Growth and Development of Petunias(Petunia hybrida Vilm) Seedling

[Objective] The purpose was to study the effects of NaCl on growth and development of petunias seedling,and provide a theoretical guidance for its plug seedling production in a large scale.[Method] NaCl concentration was 0(CK),0.25,0.50,1.00,1.25,1.50 g/L respectively,growth and development of petunias were determined.[Result] The results showed that low concentration NaCl was help for nutrient uptake of petunias.Among them,the 0.50,1.00 g/L treatments were the best plant growth vigor,and was significant better than the control.Although 1.25,1.50 g/L treatments plant growth vigor were all better than the control,was obviously poor as 0.50,1.00 g/L treatments.Determination of matrix EC and its nutrient content showed that NaCl had a little effects on matrix EC because usually the plug seedlings matrix had ability of buffer capacity to salt,but had significant effects on major element contents.[Conclusion] The low concentration salt contributes to growth and development of plug seedlings,so some city waste water fitting demands can be used to culture the seedlings directly.