Abstract:

Taking Ziyun plum as the research object, through measuring and analyzing indexes such as fruit size, color, quality, kernel, yield, pesticide residues, etc., the effects of quality improvement techniques and common management techniques on fruit quality and yield were studied. The results showed that the application of the techniques could significantly improve the fruit quality of Ziyun plum. Under the quality improvement techniques, single fruit weight, fruit longitudinal diameter, fruit transverse diameter, fruit shape index, soluble solids, soluble sugar, sugar-acid ratio, fruit stalk diameter, solid-acid ratio, red-green value, yellow-blue value, the length, width and thickness of fruit kernel, and the yield of Ziyun plum were significantly higher than those of the control. The soluble solids content, soluble sugar content, yield per plant and yield per unit area were increased by 13.87%, 11.75%, 37.33% and 37.37%, respectively, while the content of titratable acid was decreased by 13.83%. Only carbendazim, difenoconazole and cyhalothrin were detected in the conventional pesticide residue control, and their detected values were far lower than the limit value of green food, and other pesticides were not detected.

Key words: plum, quality, yield, green food, quality improvement techniques