Agricultural Research Corporation (ARC) - Sudan
Proceedings of the Meetings of the National Crop Husbandry Committee - NCHC
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Effects of different
fertilizers on yield and quality of foster grapefruit
Abdalla A. M. Elhassan , Abdelmounem M. A. Eltilib , Hassan S.
Ibrahim and
Abdelaziz A. Hashim
Abstract:
This experiment was conducted for three consecutive seasons (1995-96,
1996-97 and 1997-98) to investigate the nutrient deficiency and to
correct the nutritional status by application of appropriate fertilizers
to Foster grapefruit (Citrus paradisi Macf.) trees grown in Sennar area.
A detailed survey was carried out for 8 Foster grapefruit orchards in
Sennar area (13º 37′N,-33º 37′E) representing Sudan Central Clay Plain.
The survey included soil, plant and fruit analysis beside yield records
for one season (1995-96). The orchards were deficient in nitrogen and
zinc in both soil and plant. Urea, sheep manure and Terra-sorb (foliar),
and their possible combinations were applied to the trees for two
seasons (1996-97 and 1997-98) to determine their effects on fruit yield
quality parameters. All treatments significantly increased average yield
over control with inconsistent effects on fruit quality. Urea at the
rate of 2.17 kg/tree/year exerted adverse effects on fruit quality
indicated by thick peel and reduced vitamin C. Manure at the rate of 20
kg/tree/year resulted in fruits of dark green color and thick peel. The
foliar treated trees at the rate of 200 ml/100 l water yielded small
thick fruits of low total soluble solids, low titrable acidity and low
vitamin C. The most economically feasible fertilizer treatment of best
fruit quality indicated by color, thinner peel, high total soluble
solids and high vitamin C was attained by a combination of urea and
manure. This combination also yielded larger fruits.
Proceedings of the Meetings of the National Crop Husbandry Committee 37th (2005) pp. 42-51
Proceedings of the Meetings of the National Crop Husbandry Committee - Sudan
Copyright©2008 National Crop Husbandry Committee
