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Sudan Journal of Agricultural Research
Response
to soil mulch of some tomato genotypes raised under different environments
O. A. Sidahmed1, M. S. AL Rawahi2, F. S. AL Raisy2
and S. K. Quatity2
Abstract
Response of tomato growth, yield and ionic concentration were studied on the
tomato genotypes: Tattoo F1, Keno F1, Sunglobe F1, Aya 9 F1, Gico F1, Alwadi
F1 and PS9586 F1’ raised at four environmental locations viz. Rumais,
Jimmah, Alkamil and Sohar under black plastic soil mulch. The poor sandy
soils and high water and soil salinity at Rumais were among the most
detrimental factors limiting growth and productivity of all tomato genotypes
compared to other locations, with low salinity. The highest yield was
obtained at Sohar (98.6 t/ha) and the lowest at Rumais (12.3 t/ha). Over all
locations the highest yield was given by the variety Aya 9 F1 (64.0 t/ha)
and the lowest by Tattoo F1 (39.7 t/ha). Significant interactions in yield,
dry biomass and total soluble solids were detected between locations and
mulching and locations and varieties. The genotypes raised under mulch at
Jimmah and Rumais with high salinity produced greater dry biomass, and yield
compared to control, while the reverse was true for Sohar and Alkamil with
low salinity levels. The genotypes raised at Rumais accumulated high Na+ and Cl-
and low K+ levels in the leaf tissues resulting in a low K+/Na+ ratio.
Such a low K+/Na+ ratio resulted in ionic imbalance leading to reduced
growth and productivity.
Keywords:
Sudan Journal of Agricultural Research Vol. 6 (2006) PP. 27-33
