关键词: 荔枝, 品种, 产地, 品质评价, 相关性分析

Abstract: To explore the nutritional quality characteristics and differences of litchi in different producing areas in Lingnan region, this paper collected eight litchi cultivars from six main producing areas (Haikou, Maoming, Zhanjiang, Guangzhou, Huizhou and Shanwei) , and measured single fruit weight, edible rate, Vc, reducing sugar, sucrose, total acid, soluble solids and sugar acid ratio to compare the differences of litchi quality of different cultivar from different producing areas. The results showed that: different cultivars of litchi had their own advantages in individual quality indicator. Among the eight litchi cultivars, Ziniangxi litchi and Nuomici litichi had the highest single fruit weight and edible rate, respectively, Feizixiao litchi had the highest Vc and reducing sugar, while Guiwei litchi had the highest content of sucrose and soluble solids. The quality indexes were correlative. The eight quality indexes were integrated into three principal components by principal component analysis, and Feizixiao litchi got the highest score. The quality indexes of the same litchi cultivar from different producing areas were also different. For Feizixiao litchi, the contents of single fruit weight, Vc, reducing sugar, sucrose and soluble solid were not significantly different among three main producing areas (Haikou, Huizhou and Maoming), but the edible rate and sugar acid ratio of Feizixiao litchi from Haikou was significantly higher than that from Zhanjiang. The edible rate, Vc and total acid content of Guiwei litchi from Guangzhou were significantly higher than that from Maoming. The contents of single fruit weight, Vc and sucrose of Nuomici from Huizhou were the highest among the three main producing areas. All cultivars from three producing areas were divided into three categories by cluster analysis, and the same cultivars among different producing areas were in one cluster. The results provided scientific basis for the cultivar screening of fresh litchi and planting structure adjustment.

Key words: litchi, cultivar, producing area, quality evaluation, correlation analysis