复色紫薇优化施肥模式研究

Study on optimizing fertilization mode of polychromatic crape myrtle

为了开发复色紫薇专有的施肥模式,通过3个品种正交试验研究7个因素下复色紫薇性状的生长指标和花性状指标差异。结果表明:施肥方法和花期追肥配比是影响复色紫薇性状最主要的2个因素;施肥时间的2个因素无论对生长指标还是花性状指标而言影响都比较小。对于复色紫薇应采用两次叶面肥的追肥方法,基肥采用拌土方式施用均衡肥料,展叶期以高钾肥料追肥,花期以高磷或均衡营养肥料追肥,适当提早花期追肥时间能够获得较好的效果。

In order to develop the proprietary fertilization mode of polychromatic crape myrtle,this paper studied the differences in growth and flowering index of polychromatic crape myrtle's traits under the influence of seven factors through orthogonal testing by using three varieties as the research objects.The results showed that the fertilization method and the fertilizer ratio at flowering time were the two most important factors affecting the traits of polychromatic crape myrtle.The two factors of fertilization time had little effect on either growth traits or flowering traits.The topdressing method with two foliar applications should be adopted.The base fertilizer should mix soil with balanced fertilizer.The high-potassium fertilizer should be used for topdressing at the leaf-developing period,and the high-phosphorus or balanced fertilizer should be used for topdressing at the flowering period.Bringing forward the topdressing time to the flowering period may result in good effects.