EFFECTS OF THE STRONG PRUNING OF 2-YR-OLD ORIGINAL BEARING-SHOOT ON 1-YR-OLD ORIGINAL BEARING-SHOOT OF EMBLIC

The effect of the strong pruning of 2-yr-old original bearing-shoot(OBS) to 1-yr-old original bearing-shoot(OBS) of emblic is probed into with complete analysis and single factor analysis. Complete analysis (Λ statistic) shows that strong pruning of OBS has extreme significant effects (ΛΛ0.01) to five factors of OBS in general. Variance analysis of single factor is transformed by Λ statistic. The results show that there are extreme significant effects for treatment to length, thickness, number of bearing-shoot of OBS, significant effect to length of bearing-shoot of OBS, no significant effect to the number of bearing-shoot leaves. The treatment increases the number of scion(OBS) and improves its qulitity. This study affords basis for propagation of superior trees, management of nursery of scion and equilibrium control between bearing and growth of emblic. The concept of overlapping grade of region is posed and the relationship between overlapping grade and availability of treatment is discussed. The relationship between significance of single factor and significance of multiple factors is discussed also.