施肥对紫薇生长开花特性的影响研究初报

本文研究施肥对5年生紫薇生长和开花特性的影响,结果表明：不同施肥处理对幼龄紫薇地径及冠幅生长影响不显著,对苗高生长有显著影响,施肥后,紫薇营养生长综合指标OD值的从大到小的次序为PK＞NPK＞NP＞CK＞NK；不同施肥处理间紫薇花序宽、花枝比、着花数有显著差异,但施肥对花序长的影响效果不显著,施肥后紫薇开花质量综合指标OD值的从大到小的次序为NP＞NPK＞CK＞NK＞PK.总体来看,施肥对紫薇开花特性的影响大干营养生长,P是影响该地幼龄紫薇营养生长及开花质量最主要因素,NP和NPK处理对幼龄紫薇生长及开花具有明显促进作用.

Effect of Fertilization on the Growth and Blossoming of Lagerstroemia indica

We studied the effect of fertilization on growth and blossoming characteristics of the 5yearold Lagerstro ernia indica in the paper. The results showed that there was no significant effect on young Lagerstroemia indica crown and ground diameter growth by different fertilization treatments, but there was significant effect on seedling height growth, the influence of fertilization on the nutrient growth of crape myrtle was PK〉NPK〉NP〉CK〉NK; There were signifi cant effect on the width of inflorescence, branch ratio and numbers of flowers by different fertilization treatments, but there were no significant effect on inflorescence length, the influence of fertilization on the flower quality of Lagerstro emia indica was NP〉NPK〉CK〉NK〉PK. All in all, the effect of fertilization on the blossoming characteristics of La gerstroemia indica was more than that on the vegetative growth, and P was the most important factor, and NP and NPK treatment had obvious promoting effect on the growth and flowering of young Lagerstroemia indica.