Leandro Oliveira de Andrade

Produção do girassol sob diferentes lâminas com efluentes domésticos e adubação orgânica

The use of wastewater in agricultural production promotes the sustainability of the irrigated agriculture, saving non polluted surface waters maintaining the environmental quality and serving as a source of nutrients for plants. In this manner, an experiment was conducted under greenhouse conditions, at the UFCG, to study the production of the sunflower irrigated with domestic effluent and different levels of organic manure from July to October 2008. A randomized block design was used, with 5 levels of water necessity of the crop: 40, 60, 80, 100 and 120% determined by water balance study and 4 doses of organic manuring (control - 0, 0.7, 1.4 and 2.1% on weight bans) arranged in 5 x 4 factorial design, with 3 repetitions. The organic manure until the dose of 1.4% reduced the number of days for blooming of the sunflower (IF) and with 1.5% promoted maximum plant height. With the exception of IF the levels of water reposition favored the height of plant, dry weight of the aerial part, diameter of external and internal capitulum, fresh phytomass of the capitulum, number of achenes and dry weight of achenes per plant, the highest being observed with 120% replacement level. The wastewater is a potentially viable source of water supplement for sunflower, cv. Embrapa 122/V-2000.

Qualidade de flores de girassóis ornamentais irrigados com águas residuária e de abastecimento

O uso de agua residuaria tratada vem sendo praticado na atividade agricola e tende a ser uma alternativa economica e ambiental para o cultivo de flores, principalmente de corte, em que o produto final nao tem contato direto com a agua. Objetivou-se avaliar a qualidade de flores de genotipos de girassol para corte irrigados com aguas residuaria e de abastecimento em sistema orgânico de cultivo. O ensaio foi conduzido em ambiente protegido pertencente a Universidade Federal de Campina Grande - PB, Brasil, adotando-se o delineamento experimental de blocos casualizados em esquema fatorial 4 x 2, com 3 repeticoes e 2 plantas por parcela, sendo 4 genotipos de girassol (EMBRAPA 122/V2000 - G1, Sol Noturno - G2, Sol Vermelho - G3 e Debilis Creme - G4), combinadas com 2 aguas de irrigacao (agua de abastecimento - A1 e agua residuaria tratada oriunda de esgoto domestico tratado - A2). A pratica do reuso se mostrou significativamente melhor para as variaveis de altura de planta, diâmetro de caule, numero de folhas, diâmetros externo e interno de capitulo, alem de numero de petalas. O melhor genotipo, de maneira geral, foi o Sol Noturno, que se destacou sobremaneira no periodo pos-colheita, com o melhor resultado de durabilidade.

EFEITO DO SUBSTRATO BOVINO NA GERMINAÇÃO DE PIMENTA BIQUINHO (CAPSICUM CHINENSE) IRRIGADO COM ÁGUA RESIDUÁRIA

The Brazilian semiarid region characterized by prolonged drought and poor rainfall distributed, reducing the quality and quantity of water available. In this context, the present study performed in a protected environment at the Federal University of Campina Grande aiming to analyze the germination of pepper pout with bovine substrate irrigated with different levels of wastewater treated.The treatments consisted on 5 water levels (N) using the water supply and wastewater derived from an upflow anaerobic (UASB) based on plant water requirement (NH), as follows: 100% of NH (N5) 80% of NH (N4), 60% of NH (N3), 40% of NH (N2) and 20% of NH (N1). Germination percentage (PG) the germination speed index (GSI ), mean velocity (MV) and the average time (Tm) of germination were evaluated, on biquinho pepper (BRS Moema). The germination percentage for water supply averaged 42.3% and 46.5% for wastewater. For water levels applied the average germination rate of biquinho pepper ranged from 0.086 to 0.089. The germination of pepper had better results with the use of water residuaria. O reuse of water in semi-arid regions is a viable alternative reducing costs and providing nutrients culture.