Effect of preanthesis drought on fruit yield and quality of postanthesis waterlogged tomato
YUAN Min1,2, SHAO Guangcheng1,2, CUI Jintao1,2, GUO Yuxiang2, ZHU Meiru3
1.Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, Hohai University,Nanjing, Jiangsu 210098, China; 2.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 3 College of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 210098, China)
Abstract：In order to extend the waterlogging resistance of crops themselves and seek the approaches for supporting tomato production under waterlogging condition in South China, the effects of preanthesis drought on morphological characteristics, quality and yield of post-anthesis waterlogged tomatoes are investigated under rain-shelter cultivation condition. The results show that the post-anthesis waterlogging stress can significantly restrain the crop growth and decrease the yield as well as deteriorate the quality of tomato with normal water supply at seedling stage. Compared with the normal treatment without drought stress, the pre-anthesis drought hardening can improve the growth and development of the root systems and enrich the contents of soluble sugar, soluble solids, organic acid and vitamin C. Among the three preanthesis drought hardening cases, the highest yield is achieved in T4 treatment. Further, the root mass, root-shoot ratio, fruit density and the content of soluble sugar, soluble solid, organic acid and vitamin C in tomatoes are increased, but the above ground and total dry matter mass and single fruit mass are decreased with reducing irrigation at the seeding stage. Through a principal component analysis, it is found that treatment T5 is with the best comprehensive evaluation score on the quality.
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