摘要
[Objective] This study was conducted to investigate the fresh eating-quality of Hainan Iongan. [Methed] The quality analysis was conducted on on-season and off-season Iongan, which are main cultivars in Hainan consistent in maturity. In order to understand the quality characteristics of Hainan fresh Iongan, saccharide contents, vitamin C content, edible rate, TSS, weight of single fruit, weight per fruit cluster and pesticide residues were detected in this study. [Result] There were no significant differences in quality between on-season and off-season Iongan, and the content of TSS in off-season fruit was slightly higher than that in on-season Iongan. The two main cultivars ‘Shixia＇ and ＇Chuliang＇ in Hainan differed significantly in edible quality. The weight of single fruit and edible rate of ‘Chuliang＇ were slightly higher than those of ‘Shixia＇ Iongan, and their sucrose contents were nearly equivalent. Vitamin C and TSS contents in ‘Shixia＇ Ionganwere higher than those in ‘Chuliang＇.‘Shixia＇ had a monosaccharide content significantly higher than ‘Chuliang＇, while its sucrose content was lower than ‘Chuliang＇. Only low contents of residual cypermethrin and diflubenzuron were detected in pericarp, and the contents of the 9 pesticides in fruit flesh were all lower than their detection limits. [Conclusion] Longan fruit produced in Hainan could all be eaten safely.
[目的]研究海南龙眼的鲜食品质特性。[方法]选择成熟度一致的海南主栽品种正造及反季节龙眼进行品质分析,分别检测其糖含量、维生素C含量、可食率、TSS、单果重、穗果重、农药残留,[结果]正造龙眼与反季节龙眼品质无差别,且反季节龙眼TSS略高于正造。海南两个主栽品种‘石硖’和‘储良’之间的食用品质有明显的差别:‘储良’单果重及可食率略高于石硖,穗果重相近;‘石硖’维生素C及TSS含量高于‘储良’;‘石硖’单糖含量显著高于‘储良’,而蔗糖含量低于‘储良’。仅在果皮中检测出低浓度的氯氰菊酯、除虫脲残留,果肉中9种农药残留均低于检出限。[结论]在海南境内生产的龙眼均可安全食用。
基金
Supported by National Science&Technology Infrastructure-National Infrastructure of Agriculture Germplasm Resources"National infrastructure of tropical crops germplasm resources/NICGR2016-067"
China Agriculture Research System(CARS-33-25)~~
