Research on Effects of Plant Growth Regulators on Quality of Manicure Finger Grape

Total 13 quality characters of manicure finger grape which was treated by 21 different plant growth regulators in Pengshan county, Sichuan province were judged comprehensively according to the principle of fuzzy mathematics. The results indicated that the effects of growth regulators on the internal quality of manicure finger grape was larger than the external quality. In 13 quality indicators, the first four indicators which were vitamin C content, sugar acid ratio, soluble solid and total soluble sugar impacted greatly to the comprehensive characters. The best treatment on the comprehensive quality was the use of 5000 mg L￣1 PBO on May 27 and 170 mg L￣1 S-ABA on July 10 spraying on the trees and the best treatment on the external quality was the use of 5000 mg L￣1 PBO +200 mg L￣1 S-ABA spraying on the trees. The use of 10.0 mg L￣1 Qibao spraying on the trees on May 27 was the best treatment on the internal quality.