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一、材料和方法 在我国沿海柑桔产区,采取6—15年生枳砧尾张温州蜜柑成熟果供记载分析用。采样地点有:北纬21°32′(广东廉江县)、22°28′(广西灵山县)、23°07′(广东广州市),23°43′(广东饶平县)、27°02′(福建建瓯县)、28°0′(浙江温州市)、28°34′(浙江黄岩县)、29°57′(浙江镇海县)、31°06、(上海市)共9个点。其中建瓯、灵山距海较远外,其余均临近海面,土壤除上海市为冲积土外均为山地红黄壤,每处采果30只,分别记载果实大小、重量、形状、色泽、果皮及果肉特征,同时计其可食率、果形指数。并测定可溶性固形物(阿贝氏折光仪)、pH(SPM-10酸度计)、果汁率、酸(氢氧化钠滴定)、维生素C(2,6-二氯苯酚吲哚酚法)。
First, materials and methods In China’s coastal citrus producing areas, 6-15-year-old Hovenia dulcis Thunb. Mandarin orange ripe fruit for record analysis purposes. Sampling locations are: latitude 21 ° 32 ’(Lianjiang County, Guangdong), 22 ° 28’ (Lingshan County, Guangxi), 23 ° 07 ’(Guangzhou, Guangdong), 23 ° 43’ (Raoping County, Guangdong Province), 27 ° 02 (Jian’ou County, Fujian Province), 28 ° 0 ’(Wenzhou City, Zhejiang Province), 28 ° 34’ (Huangyan County, Zhejiang Province), 29 ° 57 ’(Zhenhai County, Zhejiang Province), 31 ° 06 (Shanghai) . Among them, Jianou and Lingshan are far away from the sea, while the rest are near the sea surface. Soil except for Shanghai is alluvial soils are mountainous red and yellow soil, with 30 fruits collected from each area. Fruit size, weight, shape, color, The characteristics of the flesh, while counting its edible rate, fruit shape index. Soluble solids (Abelian refractometer), pH (SPM-10 pH meter), juice percentage, acid (sodium hydroxide titration) and vitamin C (2,6-dichlorophenol indoxyl method) were measured.