ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (6): 126-132. doi: 10.7668/hbnxb.20190108

Special Issue: Tomato

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effects of Irrigation Height on Water and Nitrogen Use Efficiency of Tomato Plug Seedlings under Ebb-and-Flow Irrigation

LI Qian1, TIAN Ya2, SHANG Qingmao1, CAO Lingling2, DONG Chunjuan1   

  1. 1. The Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Beijing 100081, China;
    2. Beijing Agricultural Extension Station, Beijing 100029, China
  • Received:2019-06-01 Published:2019-12-28

Abstract: In order to screen the suitable irrigation height for the tomato plug seedlings under ebb-and-flow irrigation, the tomato variety Zhongza 105 was taken as material to raise seedlings in plug during summer and winter.Under ebb-and-flow irrigation,the tomato variety Zhongza 105 was taken as material to raise seedlings in plug during summer and winter. Under different feeding height(1, 2, 3 cm), by comparing the water absorption rate of substrate, the seedling growth indexes, root vigor, as well as the water and fertilizer use efficiency, the suitable irrigation height was screened. The results showed that the water absorption rate of substrate increased with irrigation height. Both in summer and winter, under 3 cm of irrigation height, the shoot growth indexes including leaf aera and shoot dry weight were significantly higher than those under 1,2 cm, while the root growth indexes as well as the root-shoot ratio and seedling index showed no significant difference among three irrigation heights. Under 3 cm of irrigation height, the root vigor was significantly lower than that under 1,2 cm. In summer, under 1,2 cm, the water use efficiency was higher than that under 3 cm, and the nitrogen use efficiency showed highest under 2 cm of irrigation height. In winter, the water use efficiency and nitrogen use efficiency was higher at 2,3 cm. Based on these above indexes, for tomato plug seedlings under ebb-and-flow irrigation, both in summer and winter, the suitable irrigation height was 2 cm, which could not only ensure the seedlings growth and root vigor,but also improve the use efficiency of water and fertilizer.

Key words: Tomato, Ebb-and-Flow irrigation, Plug seedling, Irrigation height

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Cite this article

LI Qian, TIAN Ya, SHANG Qingmao, CAO Lingling, DONG Chunjuan. Effects of Irrigation Height on Water and Nitrogen Use Efficiency of Tomato Plug Seedlings under Ebb-and-Flow Irrigation[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(6): 126-132. doi: 10.7668/hbnxb.20190108.

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