富士系苹果树适期结果的人工和化学调控技术研究

Artificial and Chemical Control Technology of Timely Bearing of Fuji Apple Trees

对4～6年生的富士系苹果树应用主干环切、环剥和树体喷布1000～3200ppm乙烯利,经过3年(1989～1991)的试验表明;3种促花措施对富士系苹果树都有较显著的控制营养生长、促进成花和结果的效应,适宜在干周>14.0厘米、生长健旺、营养水平较高的树上使用。主干环剥和环切的适宜时期为5月下旬至6月上旬;在新梢旺长期(外围新梢达20～25厘米)即盛花后30天左右叶面喷2000～3000ppm乙烯利1次。

Fuji apple trees at age from 4 to 6 years were treated with trunk ring-cutting, girdling and 1000-3200ppm ethrel spray. Experiment from 1989 to 1991 shows that the above 3 measures of promotion of flower have notable effect of controlling nutritive growth, promotion of flower and bearing on the Fuji apple trees and are suitable for the trees with trunk thicker than 14.0cm, vigorous growth and higher nutrition level. The suitable period of trunk ring- cutting and girdling ranges from the third ten days of May to the first ten days of June. About 30 days after the period of the new growth being vigorous, namely the full bloom stage, 2000- 3000ppm ethrel should be sprayed over leaves of the trees once.