Atributos físicos, químicos e biológicos do solo impactado por cultivos sucessivos de arroz
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Data
2013
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Resumo
Upland rice grain yield sharply decreases when it is grown for two or more years in the same area. This study
aimed to determine which attributes of a Cerrado Oxisol are more impacted by successive crops. Samples
were taken in February 2011, at Santo Antônio de Goiás, GO, from soil layer of 0-0.10 m of three areas
cropped with upland rice under no-tillage system for one, two or three years, respectively, and of a forest
for determination of physical, chemical and biological attributes of soil. Multivariate analysis techniques
were applied on data obtained in these areas. Rice crops caused changes in all physical attributes of soil
and in most of the chemical and biological attributes when compared to the forest. The K, Cu, and Mn
contents, metabolic and microbial (qmic) quotients and microbial biomass N:total N relationship (MBN:N)
were responsible for discriminating the areas under successive rice crops. The more the years of successive
rice crops, the more the soil conditions differed from the original soil of the forest. The metabolic quotient
increased with the y
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Oryza sativa L., Análise multivariada, Semeadura direta, Oryza sativa L.,, No-tillage, Multivariate analysis
Citação
GODOY, Sinnara G. de; STONE, Luís F.; FERREIRA, Enderson P. de B.; COBUCCI, Tarcísio; LACERDA, Mábio C. Atributos físicos, químicos e biológicos do solo impactado por cultivos sucessivos de arroz. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 17, n. 12, p. 1278-1285, 2013.