Importância da reatividade do calcário sobre a produção e algumas característica da cultura da soja
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Data
1992-01-01
Autores
Bellingieri, P.A. [UNESP]
Souza, E.C.A. [UNESP]
Alcarde, J.C.
Shikasho, H.W. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ)
Resumo
O experimento foi conduzido num latossolo vermelho escuro, textura média, localizado em Jaboticabal-SP, para se estudar o efeito de dois calcários (dolomítico e dolomítico calcinado), com quatro graus de finuras (F1 = > 2mm; F2 = 2-0,84 mm; F3 = 0,84-0,30mm e F4 = < 0,30mm), sobre propriedades químicas desse solo durante dois anos agrícolas (1988/89 e 89/90) e em características agronômicas da soja cv. IAC-8. Concluiu-se que: no 1° ano agrícola (88/89) o calcário calcinado foi mais reativo, bem como as granulometrias mais finas, sendo que a produção de grãos aumentou em 14%; no 2° ano (89/90), os calcários e as finuras tenderam a igualar seus efeitos e a produção de grãos não foi alterada; para as análises foliares e de grãos, somente houve efeito para o Mg.
This experiment was conducted on a dark-red latosol, medium textured, Jaboticabal-SP, Brazil. The main objective was to study the effect of two liming materials (dolomitic and calcined-dolimitic), with four grades of particle size (F1 = > 2mm; F2 = 2-0,84 mm; F3 = 0,84-0,30mm and F4 = < 0,30mm) on the chemical properties of the soil, and on several characteristics of soybean cv IAC-8, evaluated during two croping seasons (1988/89 and 1989/90). During the first year the calcined-dolomitic limestone and the materials with smaller particles were more active and the yield of grain increased 14 percent. For the second croping season (1989/90) the effects of the liming materials were similar and grain productions were not affected by the treatments (P > 0.05). Only the contents of Mg in the leaves and grains differed among treatments.
This experiment was conducted on a dark-red latosol, medium textured, Jaboticabal-SP, Brazil. The main objective was to study the effect of two liming materials (dolomitic and calcined-dolimitic), with four grades of particle size (F1 = > 2mm; F2 = 2-0,84 mm; F3 = 0,84-0,30mm and F4 = < 0,30mm) on the chemical properties of the soil, and on several characteristics of soybean cv IAC-8, evaluated during two croping seasons (1988/89 and 1989/90). During the first year the calcined-dolomitic limestone and the materials with smaller particles were more active and the yield of grain increased 14 percent. For the second croping season (1989/90) the effects of the liming materials were similar and grain productions were not affected by the treatments (P > 0.05). Only the contents of Mg in the leaves and grains differed among treatments.
Descrição
Palavras-chave
limestone, particle size, Soybean, reactivity, calcáreo, tamanho de partícula, Soja, Reatividade
Como citar
Scientia Agricola. São Paulo - Escola Superior de Agricultura Luiz de Queiroz, v. 49, n. spe, p. 61-71, 1992.