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Effects of Paclobutrazol and Two Biostimulants on Tomato Seedling Quality |
FANG Xuejuan,SONG Mengyuan,GAO Lihong,TIAN Yongqiang* |
College of Horticulture,China Agricultural University,Beijing Key Laboratory of Growth and Development Regulation of Protected Vegetables,Beijing 100193,China |
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Abstract This study took‘Qianxi’tomato as the experimental material to screen the optimum concentrations of paclobutrazol and biostimulant(amino acid and marine algae)that are benefited for improving the quality of tomato seedlings under high temperature conditions in summer and explore the effects of the optimal concentrations of paclobutrazole,biostimulant and their combination on the quality of tomato seedlings.The results showed that paclobutrazol,amino acid biostimulant and marine algae biostimulant were all beneficial for improving the quality of tomato seedlings,with optimal concentrations of 0.2 g · L-1,0.6 g · L-1 and 1.4 g · L-1,respectively.The combination of paclobutrazol and biostimulant could further improve the quality of tomato seedlings.At the optimal concentration,compared with single treatment,paclobutrazol combined with amino acid biostimulant or marine algae biostimulant increased the seedling index of tomato seedling by 16.6%-31.7% and 8.7%-25.4%,respectively.In conclusion,the combination of 0.2 g · L-1 paclobutrazol with 0.6 g · L-1 amino acid biostimulant or 1.4 g · L-1 marine algae biostimulant can effectively improve the quality of tomato seedlings under high temperature conditions in summer.
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Received: 12 October 2022
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