Efeito do silício, nitrogênio e fósforo na nutrição mineral, produção e qualidade bromatológica de biomassa seca do sorgo forrageiro submetido à salinidade (sorghum bicolor L.).

Abstract

Took place an experiment in telado of nylon of the Centro de Saúde e Tecnólogia Rural of the Universidade Federal de Campina Grande, to evaluate the effects of the silicon, of the nitrogen and of the match in the mineral nutrition and in the production of dry mass of sorghum plants submitted to the saline stress. Being used the factorial outline and the delineamento of blocks casualizados, with four repetitions, and a plant for vase of 3 L of capacity, in that the first factor referred to the doses of Itself (0, 14 and 28 mg dm-3), the second the doses of N (100 and 200 mg dm-3) and the third party the doses of P (31 and 62 ppm), in soil, where 10 days after the germination, they received parceladamente in 1/3 of the doses from Itself, of N and of P every three days. To the 60 days after the germination, the plants were collected, separate the aerial part, dries, for determination of the production of dry mass, and moída, for determination of the tenors of N, P, K, Ca, Mg, Faith, Zn, Mn, Ass and Na.Observou-if in the treatment that received in the middle of cultivation 62 mg dm-3 of P and 100 mg dm-3 of N, larger production of dry mass of the aerial part of the sorghum and elevation in the tenors of P and K, and reduction us of In the. The addition of Itself to the soil didn't promote effect atenuador of the salinity the plants of sorghum forrageiro in these conditions.