摘要
在冬季易发生冻害的宁夏地区,多效唑的叶喷和土施对4～6年生桃树有显著控长促花效应。新梢长度减少20％～60％,节间长度减少15％～40％,冠高冠幅减少15％～30％,成花量增加 35％～250％,果实大小和品质正常,多效唑处理后新梢内源激素含量出现明显变化,但花芽冻害加重。适宜用量是5月中旬叶喷2000ppm或沟灌0.2～0.3g/m^2。
Studies on the effects of PP_(333) treatment on the 4~6-year-old peach trees were carried out in Ningxia district. Results showed that PP_(333) treatment of foliar spray and soil application severely inhibited the growth of the tree and increased the flower bud fora-tion. The shoot length, the shoot internode length, the height and the stretch of the tree were reduced by 20%~60%, 15%~40% and 15%~30% respectively; the number of flower bud formation on the shoot increased 35%~250% and the fruit quality was unchanged. After PP_(333) treatment, the content of endogenous hormones in the shoot changed obviously and the flower bud was severely injured by low temperature. The best usage is 2000 ppm foliar spray in the middle of May or 0. 2~0. 3g/m^2 soil drench application.
出处
《园艺学报》
CAS
CSCD
北大核心
1993年第2期139-144,共6页
Acta Horticulturae Sinica
关键词
桃树
生长调节剂
生长发育
多效唑
PP_(333)
Young peach trees
Growth and flower bud formation
Cold in-jury
