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| DOI：10.13522/j.cnki.ggps.2019158 |
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| Effects of Different Substrates and Irrigation Amount on the Growth of Tomato Seedlings |
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WANG Zhe, XIA Hui*, YUAN Hao, MENG Yuan, ZHAO Xinkai
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Hebei Agricultural University, Baoding 071000, China
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| Abstract: |
| 【Objective】We aimed to select the suitable substrate and irrigation amount for tomato seedling growth.【Method】Tomato seedlings were raised in greenhouse of Agricultural Water Laboratory of Urban and Rural Construction College of Hebei Agricultural University from August to September 2018. The emergence rate and seedling growth of tomato under three kinds of substrate formulations (S1 substrate of undisturbed soil, sand and vermiculite with a volume ratio of 8∶1∶1. S2 substrate purchased from conservation cultivation plant in Lianchi District, Baoding City, Hebei Province; S3 substrate of peat soil, perlite and vermiculite with a volume ratio of 3∶1∶1) and two different irrigation rates（W1 is 40 mm and W2 is 30 mm）were studied.【Result】The emergence rate of substrate S3 was the highest, which could better satisfy the germination of tomato seeds. The low-irrigation water W2 could better promote the germination of tomato seeds. The seedling emergence rate of tomato on the 8th day of sowing reached 64.58%. S2 substrate was beneficial to the growth of the tomato seedlings above ground. High irrigation W1 was beneficial to the increase of stem diameter, leaf number, leaf area and aboveground fresh mass in S1, S2 and S3 substrates. The average daily growth of S2W1 treatment was 0.02 mm, 0.19, 11.66 mm2, 6.42 mg respectively. But low irrigation W2 was beneficial to the increase of plant height in S1, S2 and S3 substrates. The average daily growth of S2W2 treatment was 0.18 cm. S1substrate was beneficial to the growth of tomato subsurface, but the performance of irrigation water on the growth indexes of S1, S2 and S3 substrate were different. The root length average daily growth of S1W2 treatment increased by 2.27 mm, and the root diameter, root surface area and root volume of S1W1 treatment increased by 0.03 mm, 6.57 mm2 and 1.30 mm3, respectively.【Conclusion】The low irrigation amount W2 of S3 substrate is beneficial to the seedling emergence of tomato seeds, and the high irrigation amount W1 of S1 and S2 substrate is beneficial to the growth of the underground and aboveground parts of tomato seedlings. |
| Key words: tomato; nursery substrate; irrigation amount; emergence rate; seedling morphology |
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