Data/hora: 05/06/2024 13:13:19

Biblioteca(s): | Embrapa Solos.
Data corrente: | 22/11/2002
Data da última atualização: | 22/11/2002
Autoria: | PURCINO, A. A. C.
Título: | Soil fertility interaction response of a dark red latosol (Typic Eutrustox) from Jaiba, Minas Gerais, Brazil.
Ano de publicação: | 1977
Fonte/Imprenta: | s.l.: Oklahoma State University, 1977.
Páginas: | 96p.
Idioma: | Inglês
Notas: | Tese Mestrado.
Conteúdo: | Nine greenhouse experiments were conducted with a dark red latosol (typic Eutrostox) collected at the Jaiba Agroindustrial District in Minas Gerais State, Brazil, with the objective of studying the complex fertility responses of this soil. Growth response to differential plant nutrient levels and combinations applied to the 0-20 cm depth soil epipedon was determined by measuring dry weight of the "above ground" or plant top growth for corn hybrid NK 9514 (Zea mays L.) utilizind five plants per pot culture with three replicate cultures per treatment. In the first set of experiments, composed of two trials, a 3 x 3 x 2 NPK factorial design was utilized. NH4NO3 was the nitrogen source with 0, 100, and 200 ppm levels. CaH4(PO4)2. H2O was the source of phosphorus with 0, 50, and 100 ppm levels, and as potassium source, K2SO4, at 0 and 200 ppm levels, was added to the soil. In this experiment, the highest yield was achieved by the treatment N2P1K. Statistical computation of these data indicated linear response to additions of both nitrogen and phosphorus, as well as a significant response to potassium.The interactions N1Pq and NqP1 were significant, and the effect NqK had an observed significant level of 5.3%. Doubled nutrient levels were used in the second trial of this set of experiments, and likewise, as in the first experiment, the N2P1K treatment showed the highest yield. The statistical analysis of these data revealed a quadratic effect for levels of both nitrogen and phosphorus and a highly significant............
Palavras-Chave: | Solos.
Thesagro: | Fertilidade.
Categoria do assunto: | --
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (4271-1) - ADD - TS - -- - 77029 - PUR/77 - 1997.01524 - DIS