Impact of green-house cover on potential evapotranspiration and cucumber water requirement
2011
Hashem, F.A.
The experiment was conducted during two successive spring seasons of 2008 and 2009 at El-Behira governorate at the North Coast of the Nile Delta, in Egypt. This work aimed to study the effect of green-house cover, irrigation level and soil mulch on growth and yield of cucumber ( Cucumis sativus L. cv. Reda F1 ) as well as the interaction between these factors . three green _ house covers (polyethylene sheet , white and black net) as main plot, three irrigation levels ( 80%,100% and 120% of the potential evapotranspiration estimated according to class A pan equation (ETº ) as submain plot and three soil mulch types ( transparent mulch, black mulch, without mulch ) as sub submain plot ,were applied in split-split-plot design with three replicates . The results showed that the highest air temperatures, relative humidity and evapotranspiration were detected in polyethylene cover treatment followed by white net treatment . Plant height, number of leaves, leaf area, total fresh and dry weights and yield were increased with white net cover treatment . The highest vegetative growth and yield were obtained by 100% ET0 compared to 80% ET0 and 120% ET0 treatments. Vegetative growth and yield were increased with the treatments mulch compared to the other treatments . The effect of interaction between greenhouse cover, irrigation levels and soil mulch were clear with white net cover plus 100% of ET0 and transparent mulch ,where the vegetative growth and yield were increased significantly during both experimental seasons.
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