Page 25 - IJES Special Issues for AIEC2016

International Journal of Environment and Sustainability, 2016, 5(1): 10-17 15

Table 6
Results of correlation coefficient of shading methods:

Corr. Total yield/rep Fruit fresh wt. Fruit dry wt. Fruit no./rep Fruit length Blooming Plant length
-0.358 0.646
Light intensity -0.549 0.647 0.630 0.012 0.631 0.706 -0.843
0.520 -0.764
Temp. 0.402 -0.730 -0.775 0.552 -0.838

R. H. -0.306 -0.737 -0.615 0.820 -0.683

Tabulated Corr. At 0.05 = 0.553, above it significant, below it not significant (Bowley, 1999).

Table 7
Results of correlation coefficient of shading methods:

Corr. Plant fresh Plant dry wt. Leaf area No. of Good Deformed Poor
wt. leaves quality fruit fruit colored fruit
Light 0.634 0.198 0.629 0.534 0.670 -0.683 -0.560
intensity
Temp. -0.661 -0.537 -0.905 -0.817 -0.110 0.129 0.0324
R. H. -0.572 -0.649 -0.748 -0.837 0.292 -0.253 -0.3998

Tabulated Corr. At 0.05 = 0.553, above it significant, below it not significant (Bowley, 1999).

Fruit Quality Measurements which may be responsible for the fruits’ lack of
quality, according to Gent (Gent, 2008). Also,
The results of fruit quality are summarized in cucumbers grown in shaded plots produced
Table 5. The highest fruit quality (99.5 %) was larger marketable yields and a lower percentage
obtained by the GS1 treatment, but without of cull fruit than plants grown in the open (Valli
significant difference with the control treat- et al., 1965). These results almost coincide with
ment, while the lowest fruit quality was those obtained in the high land experiment
obtained by the mud shading treatment (99.2 (Abu-Zahra and Ateyyat, 2015).
%). A very low deformed fruit percentage was
observed in fruits produced under the GS1 Pest Measurements
shading method (best fruit quality), while the
highest deformed fruit percentages were The only registered pest was the mite infes-
obtained by using the mud shading treatment. tation (Figure 2.). All of the shading treatments
Otherwise, very low statistical differences were resulted in a significant decrease in the
observed in the fruit color parameter, even population of the two-spotted spider mite,
though the highest percentages of the poor Tetranychus urticae, on cucumber leaves
colored fruit were observed in fruits produced planted in plastic houses compared to the
under mud shading cover, while the best results control treatment. The lowest decrease was
of fruit color were obtained by the GS1 and observed in the mud shading treatment. This is
control shading treatments. On the other hand, because shading reduces temperature, which is
the tallest fruit (16.3 cm) was obtained by the reflected in number of mites. This is nearly in
GS1 treatment, while the shortest fruit (12.8 agreement with Abu-Zahra (Abu-Zahra and
cm) was obtained by the control treatment Ateyyat, 2015).
(Table 5.) These results suggest that shading is
more beneficial under high sunlight intensity.
The reduction in marketable yield resulting
from the control treatment is proportional to
the increase in light intensity and temperature,

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