Guangdong nongye kexue (Sep 2023)
Comprehensive Evaluation of 6 Cherry Tomato Varieties Under the Substrate Bag Cultivation Mode in Multi-span Greenhouse in South China
Abstract
【Objective】The yield and quality of different varieties of cherry tomatoes (Solanum lycopersicum var. cerasiforme) were compared and analyzed under the substrate bag cultivation mode in multi-span greenhouse in South China, with a view to screening suitable high-quality variety and providing theoretical references for production.【Method】We compared and analyzed the growth, single fruit weight, antioxidant capacity, and fruit quality indexes of 6 cherry tomato varieties ('Qianxi', 'Jinyu', 'Baifei', 'Micai', 'Jinyu' and 'Zhanma'), including the contents of soluble solids, vitamin C (Vc), lycopene, total soluble sugar, etc. And principal component analysis, cluster analysis, and correlation analysis were conducted for the above indexes.【Result】The first cluster of the 'Qianxi' and 'Zhanma' bloomed about 3-6 d earlier than that of other varieties, and the 'Zhanma' had the longest flowering period among 6 varieties, and its flowering period of the first and the second clusters lasted for about 37 d. Moreover, the growth vigor of 'Zhanma' was the strongest with lots of leaflets, and its plant height was higher than that of 'Feicui', 'Qianxi', 'Micai', 'Jinyu' and 'Baifei' by 54.8%, 34.7%, 23.4%, 17.2% and 13.9%, respectively. In contrast, 'Feicui' showed short and thick stem, but single fruit weight and single plant yield were significantly higher than those of other varieties. The yield of 'Micai' and 'Zhanma' was higher than that of others, presenting high fruit quantity in each cluster, approximately up to 24 and 32 in each cluster, respectively. There were significant differences in the quality among 6 varieties of cherry tomato. The contents of chlorophyll, carotenoid and lycopene in the fruit of 'Micai' were highest, up to 33.7, 86.1 and 74.5 μg/g, respectively. The fruits of 'Micai' and 'Zhanma' had the highest Vc contents, which were up to 200 and 220 μg/g, respectively. The fruit of 'Jinyu' variety was rich in polyphenols. The quality of the 'Feicui' was relatively poor. The results of principal component analysis, clustering analysis and correlation analysis indicated that the comprehensive evaluation of 'Micai' variety was the best, followed by 'Qianxi' and 'Zhanma', and then by 'Baifei' and 'Jinyu', and that of 'Feicui' variety was the worst. Fruit size had a significant negative correlation with fruit quality, chlorophyll content and fruit quality (carotenoid, lycopene, flavonoids and Vc), while the chlorophyll content of various varieties of cherry tomato was positively correlated with fruit quality (carotenoid, lycopene, flavonoid, Vc content).【Conclusion】The comprehensive evaluation results showed that the 'Micai' and 'Zhanma' varieties had more fruit number in one cluster and higher yield, and the 'Qianxi' had better flavor quality, the comprehensive evaluation of the three varieties was excellent, and were suitable for high-quality and high-yield cherry tomato varieties in the multi-greenhouse matrix bag culture in South China. Mature 'Micai' cherry tomato is rich in chlorophyll, carotenoid and lycopene, which can be used as the variety of cherry tomato with high pigment content as the ideal material in cultivation.
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