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连续三年试验结果表明:PP333抑制山楂幼树的营养生长作用可持续三年。以第二年表现最明显,枝条节间缩短,中短枝比例增加、叶面积减小,百叶重降低,PP333能显著地促进山楂花芽形成,促进成花和抑制营养生长的效果随施用量的增加而加强,但从综合结果看出,以株用药0.5～0.75g为宜;时
The results of three consecutive years showed that PP333 could inhibit the growth of young hawthorn saplings for three years. In the second year, PP333 could significantly promote the formation of flower buds, promote the flower formation and inhibit the growth of nutrition. With the shortening of internodes, the increased proportion of short shoots, the reduced leaf area and the reduced leaf weight, Increase and strengthen, but we can see from the comprehensive results to 0.5 ~ 0.75g strain appropriate;