关键词: 柑桔类果树, 呼吸, 酸性, 糖, 果实品质

Abstract: From young fruit to its expanding period, the respiratory intensity of individual fruit of "Xing Jin" satsuma (Citrus unshiu Tanaka) and Navel Orang (C. Sinensis Osbeck) rises rapidly, while the highest respiratory intensity of fruit wight occurs during young fruit period. Thereafter the respiratory intensity dicline (s) rapidly. The amount of free acid reaches the highest value in early expanding period. The changes in contents of soluble solid matter and total sugar in fruit juice are paralell, and the contents rise steadly until the fruit is ripe. The result shows that, in low temperature area, raising the sugar content of juice is a more effective way to improve fruit quality than reducing the acidity of juice.

Key words: CITRUS-RETICULATA TREES, BREATHING, ACIDITY, SACCHARIDE, FRUIT QUALITY