摘要
对一年生“滦红”山楂苗木,喷施和土施不同浓度的PP_(333)。结罘表明:5月初喷施500mg·kg^(-1)PP_(333)溶液能显著抑制山楂苗当年营养生长;5月份土施纯量5～10毫克/株PP_(333),对第二年枝条生长量、平均枝长、节间长、叶片长度等均有显著抑制作用;同时显著增加了枝量和叶片厚度。
Foliar sprays and soil application of paclobutrazol with various concentration were made to one-year-old'Luan Hong' hawthorn seedlings. The result indicated that foliar sprays 500mg·kg^(-1)PP_(333) solution at early May could obviously inhibit the vegetative growth of hawthorn seedlings in the first year. Soil applying pure quantity 5～10mg/plant PP_(333) in May could obviously inhibit branch growing qnantity, average branch length, internade length, leaf length in the following years, and obyiously increase branch quantity and leaf thickness.
