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Chinese Journal of Applied Ecology ›› 2020, Vol. 31 ›› Issue (2): 493-500.doi: 10.13287/j.1001-9332.202002.030

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Effects of irrigation lower limit and straw returning amount on yield, quality and water use efficiency of greenhouse tomato

LI Bo, BAO Zheng-rong, YAO Ming-ze*, LI Chang-xin, SUN Xiang-long   

  1. College of Water Conservancy, Shenyang Agricultural University, Shenyang 110161, China
  • Received:2019-04-25 Online:2020-02-15 Published:2020-02-15
  • Contact: * E-mail: yaomingze@syau.edu.cn
  • Supported by:
    This work was supported by the Natural Science Foundation of Liaoning Province (2015020770) and the Talent Introduction Project of Shenyang Agricultural University (880417037).

Abstract: A split plot experiment was conducted in greenhouse to investigate the effects of irrigation lower limit and maize straw returning on the yield, quality, and water use efficiency (WUE) of tomato. Maize straw was applied for 1 (2018, A1), 2(2017, A2), and 3 (2016, A3) years at different amounts (0, 1.5×104, 3×104, 4.5×104 kg·hm-2) and different irrigation lower limits (50%θf, 60%θf, 70%θf, 80%θf, θf was the field water capacity). Variance analysis, entropy-weight and TOPSIS methods were used to examine the responses of yield, quality and water use efficiency (WUE) of tomato. The results showed that tomato yield was enhanced by the increases of irrigation lower limit. The maximum value of yield was observed in the 80%θf treatments, with the maximum average yield of 93.55 t·hm-2 in A1, 87.23 t·hm-2 in A2, and 99.34 t·hm-2 in A3, respectively. WUE and quality of tomato decreased with increasing irrigation lower limit. In the first year of straw returning, the maximum average yield of tomato was 99.60 t·hm-2 in straw returning 1.5×104 kg·hm-2 . In the second and third years, 4.5×104 kg·hm-2 straw returning had the highest average yield of tomato, which was 92.50 and 107.75 t·hm-2, respectively. The maximum WUE was observed with the straw returning of 1.5×104 kg·hm-2 in A1 and A2, while in the A3 treatment it happened in straw returning of 4.5×104 kg·hm-2. The quality index of tomato showed different trends with the increases of straw returning years and amount.