调环酸钙与烯效唑复配制剂对苹果树生长结果的影响OA

Proper regulation of new shoot growth in spring is of great significance for regulating fruit yield and quality of apple trees.Using Fuji apple trees as test materials,four concentrations of 15%prohexadione calcium·uniconazole water dispersible granules(WG,diluted 400～1 000 times)were sprayed when the spring new shoots grew to 8～10 cm in length.A second spray was applied at an interval of 12 days.After treatment,the effects of different dosages on new shoot growth,fruit yield and fruit quality were determined.The results showed that treatments of 15%prohexadione calcium·uniconazole WG inhibited the new shoot growth,with 400-fold and 600-fold dilutions showing the most notable inhibitory effects.The fruit yield increased by 16.99%～26.45%compared with the CK,the percentage of larger fruits increased,while that of the medium and the small fruit reduced,and also the single fruit weight,the fruit shape index increased.The soluble solids of the fruit increased significantly,but fruit firmness and total acid content showed no significant differences.By applying at spring new shoot growth stage,the mixed formulation 15%prohexadione calcium·uniconazole WG had significant inhibition effect on apple tree nutritional growth,and improved fruit yield and quality meanwhile.