Difference of pear fruit development feature between plastic tunnel and olpen field
The pear cultivars' Cuiguan' and ' Huangguan' were used to study the difference of fruit development between plastic tunnel and open field. The results showed that;fruit development period of Cuiguan' and' Huangguan' planted in plastic tunnel were S and 13 days longer than those planted in open field. The contents of soluble solids, soluble sugar and fruit mass of fruit in plastic tunnel were higher than those in open field. And the same was true for fruit diameter and fruit cell size. The contents of total soluble sugar,fructose,glucose and sucrose of Cuiguan' and' Huangguan' planted in plastic tunnel were higher than those planted in open field. But the total phenol content and antioxidant activity of Cuiguan' and' Huangguan' planted in plastic tunnel were only 54. 8% and 66. 4% of those planted in open field. Fruit firmnesses of Cuiguan' and' Huangguan' planted in plastic tunnel were 14.9% and 13. 7% lower than those planted in open field. Thus the contents of vitamin C of Cuiguan' and' Huangguan' planted in plastic tunnel were lower than they planted in open field. It was concluded that the pear fruit quality planted in plastic tunnel was better than that planted in open field.
pearplanted in plastic tunnelplanted in open fieldfruit developmentfruit quality