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研究了施肥对一品红天鹅绒品种抗寒性的影响及可能的调控技术。采用三因素五水平二次回归正交旋转组合设计,建立了施K、Ca、Si量与天鹅绒抗寒指标综合分之间的效应模型,并对模型进行了统计选优,降维分析,边际效应分析。结果表明氯化钾、氯化钙、硅酸钠3种肥料均能提高一品红抗寒性,且重要性依次为:硅酸钠>氯化钾>氯化钙。氯化钾最大效应在600 mg/L,分别施氯化钙、硅酸钠0 mg/L;氯化钙最大效应为200 mg/L,分别施氯化钾150 mg/L,硅酸钠25 mg/L;硅酸钠最大效应为100 mg/L,分别施氯化钙、氯化钾0 mg/L;在同时施用3种肥的情况下,高浓度硅酸钠配合低浓度氯化钾、中等浓度氯化钙或高浓度氯化钾配合低浓度硅酸钠、中等浓度氯化钙有利于抗寒性提高。高抗寒性栽培要点为:施氯化钾量267~366 mg/L,施氯化钙量90~122 mg/L,施硅酸钠量24~52 mg/L。
The effects of fertilization on the cold resistance of poinsettia velvet varieties and the possible regulation techniques were studied. A three-factor and five-level quadratic regression orthogonal rotation combination design was used to establish the effect model of K, Ca, Si amount and the composite index of velveteen cold resistance index. The model was statistically optimized, reduced dimension analysis, marginal Effect Analysis. The results showed that three kinds of fertilizers, potassium chloride, calcium chloride and sodium silicate, could improve the cold resistance of poinsettia. The order of importance was: sodium silicate> potassium chloride> calcium chloride. The maximum effect of potassium chloride 600 mg / L, respectively, calcium chloride, sodium silicate 0 mg / L; maximum effect of calcium chloride 200 mg / L, respectively, potassium chloride 150 mg / L, sodium silicate 25 mg / L; sodium silicate maximum effect of 100 mg / L, respectively, the application of calcium chloride, potassium chloride 0 mg / L; at the same time the application of three kinds of fertilizer, high concentrations of sodium silicate with low concentrations of potassium chloride , Medium concentration of calcium chloride or high concentration of potassium chloride with low concentration of sodium silicate, medium concentration of calcium chloride is conducive to improving cold resistance. High cold hardiness cultivation points are as follows: potassium chloride dosage 267 ~ 366 mg / L, calcium chloride dosage 90 ~ 122 mg / L, sodium silicate dosage 24 ~ 52 mg / L.