3%赤霉酸干悬浮剂的制备及对柑橘生长调节的影响  

Preparation of 3%Gibberellic Acid Dry Flowable and Its Effect on the Growth Regulation of Citrus

作　　者：周金龙 雷文 缪金玉 张昊 邹立强 刘伟[2] ZHOU Jinlong;LEI Wen;MIAO Jinyu;ZHANG Hao;ZOU Liqiang;LIU Wei(Jiangxi New Reyphon Biochemical Co.,Ltd.,Ji’an,Jiangxi 331300,China;College of Food Science,Nanchang University,Nanchang,Jiangxi 330047,China)

机构地区：[1]江西新瑞丰生化股份有限公司,江西吉安331300 [2]南昌大学食品学院,江西南昌330047

出　　处：《热带作物学报》2024年第11期2371-2379,共9页Chinese Journal of Tropical Crops

基　　金：国家自然科学基金项目(No.31860452);吉安市科技计划项目(No.20211-025333)

摘　　要：赤霉酸是一种典型的植物生长调节剂,对作物有增产保果的功效。赤霉酸干悬浮剂的制备工艺尚欠缺系统探讨,而且该制剂对柑橘的保果试验仍需验证。本研究探究砂磨机湿法研磨工艺对赤霉酸悬浮浆料性能的影响,并测定其喷雾干燥制备的干悬浮剂性能。采用湿法砂磨机和压力式喷雾干燥设备制备3%赤霉酸干悬浮剂,通过对湿法砂磨次数、砂磨速度和砂磨所用氧化锆珠直径大小的优化,根据悬浮剂的粒径、黏度、赤霉酸含量保留率等性能指标筛选出最佳工艺。通过田间药效试验测试3%赤霉酸干悬浮剂对柑橘保果效果及果实厚度、单果重和可溶性固形物等指标的影响。结果表明:最佳砂磨工艺为砂磨所用的锆珠直径选择1 mm,砂磨速度为2500 r/min,砂磨次数为2次。喷雾前悬浮剂黏度低于200 mPa/s,粒径约为2µm,喷雾后的干悬浮剂复水后粒径约为3µm,经此砂磨工艺处理后赤霉酸的保留率大于90%,且浆料黏度低满足生产需求。利用该工艺制得的3%赤霉酸干悬浮剂悬浮率高(>90%),润湿速度快(10 s),赤霉酸保留率高,性能指标均符合农业行业的生产应用需求,且生产过程中悬浮剂浆料未出现沉淀。田间试验结果表明,喷施赤霉酸干悬浮剂后柑橘单果的横纵径增大、果皮厚度减小、单果重增加、可溶性固形物增加,种植区坐果率提高。研究结果为赤霉酸干悬浮剂的工业化生产提供理论支持,为赤霉酸在柑橘类果树上的应用提供参考。Gibberellic acid is a typical plant growth regulator,which has the efficacy of increasing yield and fruit preservation for crops.The preparation process of gibberellic acid dry flowable is still lacking systematic exploration,and the fruit preser-vation test of this preparation on citrus still needs to be verified.The study was aimed to investigate the effect of the wet grinding process of sand mill on the performance of gibberellic acid suspension slurry and to determine the performance of dry flowable prepared by spray drying.The 3%gibberellic acid dry flowable was prepared by the wet sand mill and pressure spray drying equipment,and the final process was screened according to the determination of particle size,viscosity,the re-tention rate of gibberellic acid content,and other performance indexes of the suspension concentrate through the optimization of the number of wet grinding times,the wet grinding speed,and the size of the diameter of zirconia beads used for wet grinding.The effect of 3%gibberellic acid dry flowable on citrus fruit set,fruit thickness,single fruit weight and soluble sol-ids were tested in field efficacy test.The results showed that the optimal grinding process was 1 mm in diameter of the zirco-nium beads used for grinding,the grinding speed was 2500 r/min and grould twice.The viscosity of the suspension concen-trate before spraying was lower than 200 mPa/s,and the particle size was about 2µm,and the particle size of the suspension concentrate after spraying was about 3µm after rehydration,and the retention rate of gibberellic acid was more than 90%after this grinding process,and the low viscosity of the slurry could meet the production requirements.The 3%gibberellic acid dry flowable produced by this process has high suspension rate(>90%),fast wetting speed(10 s),high retention rate of gibberellic acid,and the performance indexes are in accordance with the regulations,and there is no precipitation of suspension slurry during the production process.The results of the field trial showed t

关 键 词：赤霉酸 干悬浮剂 湿法砂磨工艺 柑橘 

分 类 号：S666[农业科学—果树学]