三种生长调节剂对设施冬枣新梢生长及果实品质的影响

Effects of three growth regulators on shoot growth and fruit quality of winter jujube cultivated in facilites

以塑料连栋设施冷棚三年生冬枣为试材,探讨调环酸钙、多效唑、烯效唑3种生长调节剂对设施冬枣新梢生长及果实品质的影响。以清水作为对照,喷施调环酸钙、烯效唑、多效唑3种调节剂,分别设置100、300、500 mg/L 3种浓度共9个处理,在新梢生长期进行2次喷施,定株定枝观测新梢生长情况,果实成熟后对品质进行测定。结果表明,喷施调环酸钙、烯效唑、多效唑100~300 mg/L对新梢长抑制效果较好,调环酸钙促进新梢粗度增长效果最好,100 mg/L调环酸钙、烯效唑能有效抑制新梢节间生长;各处理叶片叶绿素SPAD值提高。3种调节剂处理的树体控旺效果优于对照,其中300 mg/L调环酸钙处理的综合指标最好,能促进新梢增粗,抑制新梢旺长,提高叶绿素含量和单果重,改善果实品质。

The effects of three growth regulators,including prohexadione calcium,paclobutrazol and uniconazole,on the growth of new shoots and fruit quality of 3-year winter jujube were investigated.With water as the control,three regulators of prohexadione calci-um,uniconazole and paclobutrazol were sprayed,and nine treatments with three concentrations of 100,300 and 500 mg/L were set,respectively.The shoots were sprayed twice during the growth period,and the growth of new shoots was observed by fixing the plant and branches.The quality of fruit was determined after ripening.The results showed that 100~300 mg/L of prohexadione calcium,uni-conazole and paclobutrazol had an inhibitory effect on the growth of new shoot length,and prohexadione calcium had the best effect on the growth of new shoot thickness,and 100 mg/L of prohexadione calcium and uniconazole could effectively inhibit the growth of new shoot internode.The chlorophyll SPAD value of each treatment increased.The tree growth control effect of the three kinds of regulators was better than that of the control group,and the comprehensive index of 300 mg/L prohexadione calcium treatment was the best,which could promote the thickening of new shoots,inhibit the vigorous growth of new shoots,and increase chlorophyll content and sin-gle fruit weight to improve fruit quality.