SANTOS JÚNIOR, J. A.; http://lattes.cnpq.br/2839547928353699; SANTOS JÚNIOR, José Amilton.
Résumé:
The development of technologies that use the available water resources
efficiently, regardless of their physical-chemical and microbiological quality, is an
alternative in order to support the management of water resources and expand the
production capacity of irrigated systems in semiarid regions. Against this background,
the effects of different management strategies of irrigation using saline water and
wastewater (domestic effluent) and different substrates on the emergence and vigor,
growth and development, and production and post-harvest flowers of sunflower plants
grown in semi-hydroponic systems and in hydroponic systems alternative, that consider
the peculiarities of the brazilian semiarid, was studied. The results of researchs
developed were subjected to analysis of variance comparing by regression analysis the
quantitative factors and by testing of means (Tukey) the qualitative factors at the 0.05
level of probability, using software statistical SISVAR version 5.2. In general, it was
found that in the dry season is possible to produce flowers of sunflower in commercial
standard, using the domestic effluent as the nutrient solution using the strategy of
replace the volume percolated up to four days; in the rainy season, however, to obtain
similar results it is necessary do the nutritional supplementation at least on dose of 55%
of the concentration of NPK tested. Regarding the use of saline water, it was concluded
that it is possible to produce flowers of sunflower of cultivars EMBRAPA 122-V2000,
Sun Night and Garden Gnome, in standard commercial, using salinity levels up to 9 dS
m-1.
