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1983～1986年,每年从9月1日起至次年3月1 日止,在红柑砧十年生的嫁接果树上,每隔半月一次,定点、定时、定株采集早生宫川温州蜜柑、大红袍红桔、罗伯逊脐橙、锦橙、红玉血橙等5个品种树冠中部的东、南、西、北、中部具代表性的样果10～20个,进行果汁可溶性固形物、总糖、柠檬酸、VC、果汁率等指标分析,以固酸比为主要依据进行成熟度论证,结合当地实际情况,认为五个品种的适时采收期应为:
From 1983 to 1986, every year from September 1 to March 1 of the following year, on the grafted fruit tree of ten-year-old red kangsheng root, once every half a month, fixed-point, regular, Dahongpao orange, Robertson navel orange, orange, red blood orange and other five varieties of crown middle east, south, west, north and central representative of the sample 10 to 20, the fruit juice soluble solids, total sugar , Citric acid, VC, fruit juice and other indicators of analysis, the ratio of solid to acid as the main basis for the maturity of the argument, combined with local conditions, that the timely harvest of five varieties should be: