MENEZES JUNIOR, J. C.; http://lattes.cnpq.br/1783802848311750; MENEZES JÚNIOR, José Carlos de.
Resumo:
Correcting the problem with soil salinity requires in addition to reducing the
concentration of soluble salts and sodium in the soil profile, increased fertility in order
to satisfactory yields. The objective was to evaluate the effect of lime, phosphorus
sources and rates of improvement in the physics and chemistry of a saline-sodic soil and
yield of millet. The research was conducted in a greenhouse belonging to the CSTR /
UFCG, Patos-PB. The soil used in the experiment comes from the Irrigated Perimeter of
São Gonçalo, in the municipality of Sousa-PB. The experiment was conducted in a
completely randomized design in factorial 2 x 2 x 4 concerning the corrective (gypsum
and sulfuric acid), sources of phosphorus (phosphoric acid and superphosphate) and P
rates (0, 70, 140 and 210 mg dm-3) with three replications. The soil was packed in jars
incubated remaining after application of lime for 20 days, then done washing, and 20
days after the addition of phosphate sources. Soon after, he grew up millet. Both
corrective further reduction in salinity and sodicity. Interactions were observed between
the lime and phosphorus sources. Phosphoric acid was more effective than
superphosphate in soil P availability. Plants grown with phosphoric acid showed higher
vegetative growth and nutrient accumulation.