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Melon crops (Cucumis melo L., cv. Tendral) grown in a mediterranean environment under saline-sodic conditions: Part II. Growth analysis

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  • Tedeschi, A.
  • Riccardi, M.
  • Menenti, M.

Abstract

An irrigation experiment using saline-sodic waters was carried out in 2004 in the Volturno river plain (southern Italy) to investigate the growth of the melon cultivar Tendral under saline-sodic conditions. Four salinity irrigation treatments (C, T0.5, T1 and T2) were tested using water with electrical conductivities of 0.9, 8.7, 15.3 and 28.2 dS m-1, respectively. At the end of the crop cycle the electrical conductivity () of the saturated paste in the soil profile between 0.0 and 0.9 m reached values of 0.9, 3.2 4.2 and 6.6 dS m-1, respectively, for the C, T0.5, T1 and T2 treatments. Increasing salinity led to a rise in specific leaf area (SLA; cm2 g-1) while it reduced leaf area (LA, m2 per plant), leaf area ratio (LAR, cm2 g-1), the unit leaf rate (ULR, g m-2 per day) and water use efficiency (WUE g kg-1). The relative growth rate (RGR, g g-1 per day) and the biomass produced (W, g plant-1) decreased. The reduction in RGR was closely related to the reduction in relative leaf area growth rate (RLAGR, cm2 of leaf cm-2 per day), the relative leaf weight growth rate (RLWGR, g of leaf g-1 per day) and the relative fruit weight growth rate (RFWGR, g of fruit g-1 per day). A highly significant positive correlation was found between RGR and LAR (R2 = 0.9847***), while between RGR and ULR the determination coefficient was also significant but lower (R2 = 0.6808***). The most visible effect of the salinity treatment was on LA reduction. In T0.5, T1 and T2 the LA was respectively 10%, 34% and 45% less than in the C treatment. W and the crop evapotranspiration (ETc) also decreased with increasing salinity. The reduction in W for T0.5, T1 and T2 (respectively, 2%, 28% and 40% less than treatment C) was greater than the reduction in ETc (respectively, 2%, 22% and 32% less than treatment C). Therefore also the WUE significantly decreased as salinity increased. The Tendral cv. responded to salinity mainly with morphological adaptations, first with a LA reduction that was followed by decreases in the W and ETc. There may well also be functional adaptations associated with ULR reduction.

Suggested Citation

  • Tedeschi, A. & Riccardi, M. & Menenti, M., 2011. "Melon crops (Cucumis melo L., cv. Tendral) grown in a mediterranean environment under saline-sodic conditions: Part II. Growth analysis," Agricultural Water Management, Elsevier, vol. 98(9), pages 1339-1348, July.
    • Handle: RePEc:eee:agiwat:v:98:y:2011:i:9:p:1339-1348
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    References listed on IDEAS

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    1. Tedeschi, A. & Lavini, A. & Riccardi, M. & Pulvento, C. & d'Andria, R., 2011. "Melon crops (Cucumis melo L., cv. Tendral) grown in a mediterranean environment under saline-sodic conditions: Part I. Yield and quality," Agricultural Water Management, Elsevier, vol. 98(9), pages 1329-1338, July.
    2. Letey, J. & Hoffman, G.J. & Hopmans, J.W. & Grattan, S.R. & Suarez, D. & Corwin, D.L. & Oster, J.D. & Wu, L. & Amrhein, C., 2011. "Evaluation of soil salinity leaching requirement guidelines," Agricultural Water Management, Elsevier, vol. 98(4), pages 502-506, February.
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    2. Chen, Qiting & Jia, Li & Menenti, Massimo & Hu, Guangcheng & Wang, Kun & Yi, Zhiwei & Zhou, Jie & Peng, Fei & Ma, Shaoxiu & You, Quangang & Chen, Xiaojie & Xue, Xian, 2023. "A data-driven high spatial resolution model of biomass accumulation and crop yield: Application to a fragmented desert-oasis agroecosystem," Ecological Modelling, Elsevier, vol. 475(C).
    3. Tedeschi, A. & Lavini, A. & Riccardi, M. & Pulvento, C. & d'Andria, R., 2011. "Melon crops (Cucumis melo L., cv. Tendral) grown in a mediterranean environment under saline-sodic conditions: Part I. Yield and quality," Agricultural Water Management, Elsevier, vol. 98(9), pages 1329-1338, July.
    4. Yavuz, Duran & Seymen, Musa & Yavuz, Nurcan & Çoklar, Hacer & Ercan, Muhammet, 2021. "Effects of water stress applied at various phenological stages on yield, quality, and water use efficiency of melon," Agricultural Water Management, Elsevier, vol. 246(C).
    5. Visconti, Fernando & Salvador, Alejandra & Navarro, Pilar & de Paz, José Miguel, 2019. "Effects of three irrigation systems on ‘Piel de sapo’ melon yield and quality under salinity conditions," Agricultural Water Management, Elsevier, vol. 226(C).

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