| Summary: | 碩士 === 國立嘉義大學 === 農學研究所 === 97 === The effect of different bagging materials and dates on fruit growth and quality of ‘Mato Peiyu’ (Citrus grandis Osbeck ) fruit were investigated in the test. The results was shown that the ‘Mato Peiyu’ fruit growth pattern appeared a single sigmoid curve based on fresh weight, fruit volume and fruit diameter. In the early growth stage the peel grew quickly and the pulp grew at later stage. The fresh weight, volume , diameter, pulp rate ,juice rate, total soluble solids and TSS/TA ratio of fruit increased with fruit development , while the titrated acidity of juice decreased. The highest chlorophyll content of peel was found at the fist time of the test, and then declined gradually during fruit development. The peel color was dark green in the early growth stage, and then become yellow-green or yellow near mature period. The chlorophyll content of peel was negatively correlated with brightness(L*) and chroma ,and positively correlated with hue angle .
There was no difference of different bagging materials on fruit fresh weight, volume , diameter, pulp rate ,juice rate, total soluble solids and TSS/TA ratio . The chlorophyll content and hue angle of peel of fruits bagged with two layers kraft bags were lower than these fruits bagged with white paper bags and fruits which were unbagged ,where the brightness and chroma was on the contrary. The chlorophyll content and hue angle of peel of fruits bagged with newspaper bags was also lower than unbagged fruits. The results suggested that two layers kraft bags had best effect on the coloration of peel , and newspaper bags was poorer than two layers kraft bags.
The influence of different bagging dates on fruit fresh weight, volume , diameter, pulp rate ,juice rate, total soluble solids and TSS/TA ratio was not significant . The chlorophyll content of peel of fruits bagged on Sep.16 was lower significantly than fruits bagged on Aug.1 ,where the brightness and chroma was on the contrary. The results suggested that bagged on Aug.1 had best effect on the coloration of peel.
|
|---|
