SILVA, J. E. B.; http://lattes.cnpq.br/1057402920704825; SILVA, José Everardo Barbosa da.
Resumen:
The objective of this study was to characterize the guava fruits, Paluma specime,
through the physical, physical-chemistries and chemistries determinations as a function
of irrigation depth and Nitrogen manuring. The experiment was carried out in the
Veludo's Experimental Station, EMEPA, located in Itaporanga, Paraíba State. It was
utilized an experimental design in randomized blocks, in factorial scheme (4 x 4) with
four repetitions.The Nitrogen doses of 50, 100, 150, 200 kg ha"1 and irrigation depth L I
= 1144 mm, L2 = 1465 mm, L3 = 1785 mm e L4 = 2106 mm were tested. The fruit
equatorial diameter was influenced apart by the irrigation depths, with an increase of
27,1%. The doses of Nitrogen (200 kg ha"1) influenced the médium weight of fruits and
the longitudinal and equatorial diameter. The largest values of médium weight of fruits
(kg) and the commercial productivity (ha"1) were obtained with the combinations of 200
kg ha"1 of nitrogen. The °Brix° of the guava fruit was influenced by the water quantity
applied decreasing in proportion the irrigation depth increased, the same it was verified
with the Nitrogen doses. The médium weight of fruits over 200 g was obtained when it
was applied a dose larger than 100 kg ha"'de N and in each increment of 50 kg ha"1
of Nitrogen, it had an increase of 13.3% in the médium weight of the fruit. Just the
nitrogen dose interfered in pH of fruit, which varied from 3.37 to 4.40. In general, in
this study, the dose of 150 kg ha"1 of Nitrogen and the irrigation depth of 1785 mm
presented the better results.