| The investigation aimed to research the growth form of three peach trees(standard, pillar, weeping). According to many aspacts comparation between different endogenesis incretion ,analyzed the chemistry signal changes which lead to different growth forms of peach trees. Emphasized to determine and analyze the branch growth status and the root character in different bearing periods.Compared the growth characters and root livingness in different periods. Definituded the correlativity between the characters of upground part and the root system and carried through accidence discuss.And educed several main conclusions as follows:(1)The investigation of three peach trees indicated that, the type of trees were changed in the growth process. In May, there are no significant differences between the basal angle and extended angle of branches in different type of trees. The difference bough of weeping formincrease gradually in the middle of June,the bough of pillar and standard changed little,The extended angle of weeping form is 92.7°of September,and the bough of pillar and standard form are 55.1°and 67.5°, the three peach trees was basically identical with bough angle,The results showed Although no evident changes were found of base angle, the difference bough of extended angle lead to the different of plant types,and the declined trend of extended angle is weeping, pillar, standard.(2)The content of four kinds of endogenous plants hormone were different in three types peach laminae and branch. However, the differences were not significant in May. With the laminae and branches growing, the content of GA, IAA and ZR increased as ABA decreased in July. The content of ABA increased as GA, ZR and IAA decreased in September. For the same branch, the difference of plants hormone content was significant in tip, middle and basal part. The content of IAA,GA,ZR in tip part were more than the in basal part. However, compared to the tip part , there were higher ABA content in the basal part. For the weeping peach, the contents of four endogenous plants hormone in each side of one branch was significantly different. The content of GA, IAA and ZR in the upside was more than downside. The content of ABA was on the contrary .Thus curved Lower than the growth rate in the upside than downside(3)The difference of root traits in different growth period were significant differences,the difference of different peach trees is not significant in May,but it is significant in July and September. Three peach trees were significant differences in root dry weight,root volume,root area,length of taproot and diameter of taproot.It shows that the floor of the different potential direct impact on the growth of roots.(4)Three different periods in plant type of root activity of different sizes,the differences between the varieties were not reached significant levels in May, Root activity in July was significantly higher than in May, The highest standards of root activity to 242.8mg/g.h,but weepings only to 197.6mg/g.h, In September The highest weeping of root activity to 262.6mg/g.h, Significantly lower than standard and pillar.
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