Termofosfato de alumínio nas culturas do feijão, soja e sorgo, em solos de cerrado

• Autor(a) principal: Silva, Marciana Cristina da
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/001300000dntp
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/4450
• topic: Fosfato reativo; Superfosfato triplo; Glycine max; Fontes de fósforo; Reactive phosphate; Triple superphosphate; Glycine max; Phosphorus sources; AGRONOMIA::CIENCIA DO SOLO

In order to evaluate the efficiency of aluminum phosphate in four trials , we conducted an experiment in the Goiânia region, Goiás State, Brazil (16o36´S 49o17’W, 730m), in an Oxisol with low phosphorus . Two trials were conducted in pots , arranged in a greenhouse and two field trials . We used a block design to chance. The treatments consisted of five sources of phosphorus , a witness without P and ten repetitions , totaling 60 experimental units . For tests performed in the greenhouse . Where: T1 - T_Yoorin - termophosphate ; T2 - FN_Arad - Natural Reactive Phosphate Arad ; T3- ST - Triple superphosphate ; T4- T_Al - thermophosphate aluminum powder; T5 - FN_Al - Natural Aluminum Phosphate ; T6 -Test - Witness - no phosphate fertilizer . For tests performed in the same field of P sources were used with four replications . We estimated the productivity of crops , the soil P levels in leaf and soil P extracted by Mehlich 1 , chlorophyll content , plant development , and the residual effect of the sources used . The main conclusions were that the efficiency of aluminum phosphate obtained depended on the variable used . The application of aluminum thermo offered better results in most experiments , with aluminum phosphate reseultados the worst may be compared with the control . The other sources also show relevant results , and the tripo superphosphate , being soluble in water and termophosphate .