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根据浙江省科学院柑桔研究所对早桔、本地早和(木曼)桔三品种,从1951年至1976年(其中缺1968年)25年的(即16年生树至41年生树)每一品种162株或81株的平均株产量进行方差分析,并用邓肯新复极差检验,结果表明;整个25年间三品种间产量差异不显著。在不同年份间相比,1972、1965、1964年产量均超过1976年,达0.01显著水平。三品种以(木曼)桔的25年间产量最不稳定,其次是早桔,而本地早最稳产,在不同年代间各品种均以七十年代前半期产量最不稳定。
According to the citrus research institute of Zhejiang Academy of Sciences for early orange, local early and (Mann) orange varieties, from 1951 to 1976 (whichever is 1968) for 25 years (ie 16-year-old tree to 41 year-old tree) The average yield of 162 cultivars or 81 cultivars was analyzed by ANOVA and the difference between the three cultivars was not significant. Compared with different years, the production in 1972, 1965 and 1964 all exceeded that in 1976, reaching a significant level of 0.01. The output of the three cultivars (Mann Mans) was the most unstable in the 25 years, followed by the early orange, while the earliest and most stable in the country. The varieties were most unstable in the first half of the 1970s at different times.