Abstract

A factorial experiment, in the form of completely randomized design with two factors, was conducted in four replicates to investigate the effects of silica nanoparticles (nanoparticle-SiO₂) and calcium chelate (Ca-chelate) on gerbera (Gerbera jamesonii L.). The first factor was nanoparticle-SiO₂ concentration in nutrient solution (at four levels of 0, 20, 40 and 80 mg L⁻¹) and the second factor was Ca-chelate concentration in nutrient solution (at four levels of 0, 60, 120 and 240 mg L⁻¹). Number of leaves, number of flowers, number of flower buds and aborted flower buds, time of flowering, flower vase life, flower color, percentages of ash and lignin in stem, petal protein, as well as the amounts of silica and calcium in stem, leaf and root were measured. Compared to control, the treatment of 80 mg L⁻¹ of nanoparticle-SiO₂ with 60 mg L⁻¹ of Ca-chelate increased the number of flowers by 182%. Moreover, applying 60 mg L⁻¹ of Ca-chelate and 20 mg L⁻¹ of nanoparticle-SiO₂ led to flowers with 1.5 times higher longevity and 27% increase in flowering rate. The highest flower bud numbers and the lowest bud abortion were obtained in the treatment with 80 mg L⁻¹ of nanoparticle-SiO₂ and 60 mg L⁻¹ of Ca-chelate. The highest concentration of calcium in stem, leaf and root as well as the highest amount of protein, pigment intensity and degree of transparency were observed in the treatment with 240 mg L⁻¹ of Ca-chelate and 80 mg L⁻¹ of nanoparticle-SiO₂.

摘要

以四个因子的完全随机设计的形式进行了析因实验，一式四份，以研究二氧化硅纳米颗粒（nanoparticle-SiO ₂）和螯合钙（Ca-螯合物）对非洲菊（Gerbera jamesonii L.）的影响。第一个因素是营养液中的纳米颗粒SiO ₂浓度（0、20、40和80 mg L ^-1的四个水平），第二个因素是营养液中的钙螯合剂浓度（0、60、4和4个水平， 120和240 mg L ^-1）。叶数，花数，花蕾数和流产的花蕾数，开花时间，花瓶寿命，花色，茎中灰分和木质素的百分比，花瓣蛋白以及茎中二氧化硅和钙的含量测定叶和根。与对照相比，用60 mg L ^-1的钙螯合剂处理80 mg L ^-1的纳米颗粒SiO ₂可使花朵数量增加182％。此外，施用60 mg L ^-1的钙螯合物和20 mg L ^-1的纳米颗粒SiO _2可以使花朵的寿命提高1.5倍，开花率提高27％。80 mg L处理的花蕾数最高，流产最少。^-1的纳米颗粒的SiO ₂和60毫克的L ^-1钙螯合物。在240 mg L ^-1的钙螯合物和80 mg L ^-1的纳米颗粒处理中，茎，叶和根中的钙含量最高，蛋白质，色素强度和透明度最高。 SiO ₂。