关键词: 套袋, 二次套袋, 外观品质, 内在品质

Abstract: Pyrus pyrifolia Nakai. cv. Eli No.2 was used as material to study the effect of different types of bagging on fruit quality. The results showed that bagging could significantly improve the appearance of fruits with smaller and less fruit dots， and decrease rusty stain index. There was significant linear relation between transparency of bags（x） and the size of fruits（y） with the regression equation of YW=159.61+0.99x. Regression equation and correlation coefficients showed as: brightness （L）， YL=74.45-0.71x; colority coordinate value （A）， YA=-16.68-0.77x; colority coordinate value （B）， YB=52.52+1.86x. The Vc content was higher than that of the control. The SSC/TA and SS/TA of the fruits in bagging treatment increased compared to the controls. According to the results， it was concluded that the most appropriate paper bag types for P.pyrifolia Nakai. cv. Eli 2 were twolayer bags from Xiaolin， South korea， Taiguo and twice bagging was commendatory in the manufacturing of P.pyrifolia Nakai cv. Eli No.2.

Key words: bagging, twice bagging, appearance quality, internal quality