SANTOS, Adriana da Silva.
Résumé:
This study aimed to evaluate this research the influente of salinity leveis of
irrigation water on the twinning and initial development of sorghum plants (Sorghum
bicolor L. Moench cv. Br 610), and the effect of chemical and organic fertilizers in
mitigating the possible consequentes resulting from the excess salts in the water, on
these stages. The experiment was conducted at the Science Center and Agrifood
Technology Federal University of Campina Grande, Campus de Pombal (CCTA /
UFCG) in the Forage Sectíon. Irrigation was performed by drainage lysimeter method.
plastic pots were used for capacity 20 liters, perforated and connected to the collector
hoses for conducting the leached water fraction, in order to control irrigation. The
experimental design was arranged in randomized blocks in a 5x4 factorial scheme,
considering salino water with tive electrical conductivity values (CEA): 0.3; 2.3; 4.3;
6.3 and 8.3 dS m-' and tour forms offertílizer: 1 - no fertilization (contro1); 2 = organic
fertilizer (manure); 3 - 4 - mineral fertilizer and organic-fertilizer, totaling twenty
treatments with three replications. They were evaluated germination percentage (%
GERM), first count (PC%), emergency velocity index (EVI). At 5 1 days after the start
of application of the salt solutions were made Plana height measurements (AP), stem
diameter (DC), number of leaves (NF) length (L) and width (L) of the sheet for
determining the área leaf. fresh weight of aerial part (DMAP), pre-dry mass (MPS%),
dry manter forage (MSF%) and humidity. The plants had a satisCactory development to
the levei of salinity 3 (4.3 dS m-l). The organic and organic fertílization were higher in
relation to plana height (AP) and fresh weight of shoot (MFPA). Salt stress caused by
NaCI adversely affects the sorghum seed germination 6eed BRS 610, reducing the
development ofthe plants.
