Influence Of Heading And PGRs On Branching Character Of Young Apple Trees

Promote the young trees with a certain number of effective branches to shortening theperiod of fruit trees plastic, in order to achieve an effective way to early results,this test inbaoji use1-2years interstocks for M26apple saplings for material. This experiment studiedthe impact of young apple trees on characteristics to promote hair branches with theirdifferent stem heights and growth regulators. In order to provide theoretical guidance andtechnical support about short anvil apple saplings rapid prototyping, by selecting reasonablestem height, and the appropriate combination of plant growth regulators, concentration andtime. The experimental results showed as follows:(1) The diameter,branches,tree height and amount of inflorescence(CK) are greater thanthe other treatment, and this difference increases year by year. The average branch length ofCK center do extend is67.62cm, and M80processing can reach94.74cm. Both significiantdifference,which shows that CK of sapling trunk fast enlargement, large amount of shortbranches, flowers ordinal and branches and leaves increased, its forming ahead of time, isadvantageous to the young trees early results; But its not strong, weak branch growth,unfavorable to the cultivation of backbone branches and plastic.(2) M80processing of sapling germination rate is the lowest, but photosynthesis is thestrongest, the Pn5%higher than CK, leaf SPAD value up to54.3, was also significantlyhigher than that of individual processing, shows its high survival rate, growth potential isstrong, branch strong and long, but plastic with short, branching number less, may cause theresult later. Low high and dry, hair less, branches than is too large, affect the normal growtharound the branch, they do not conform to the requirements of the spindle shaped. So domoderate height (M120), have a certain amount of long branch and short branch, also has amoderate amount of germination rate and ordinal, spindle etc.(3)Under the same nitrogen level, the growth of sapling with M80processing is strongest,and the total nitrogen content is18.06g, the nitrogen fertilizer utilization rate is12.15%.Secondly, with the increase of fixed stem, the utilization rate on N15is reduced, the rate on CKis only8.69%,.It conducive that the lower stem is useful for absorbing nitrogen, and theuptake in nitrogen and utilization rate of nitrogen fertilizer will obvious raise. (4)Between March and April20, the young trees whose shoots are carved at last have thehigher germination rate, but the principal stress Is reduced, due to their short branches aremore than long branches, so the effect is not ideal. The effect of trees daubed growth regulatorin the middle of April is better than in the middle of March. And the effect using branchinghormone is best, germination rate of branch is more than95%, and the germination ability ofbranch is49.7%.