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Atividade microbiana em funcao da calagem em um solo cultivado com cofeeiro

by Andrade, D.S; Colozzi Filho, A; Pavan, M.A; Balota, E.L; Chaves, J.C.D.
Publisher: 1995ISSN: 0100-0683.Subject(s): COFFEA ARABICA | ENMIENDAS CALIZAS | ENCALADO | ANALISIS MICROBIOLOGICO | ANALISIS QUIMICO | MATERIA ORGANICA | BIOMASA | SUELO | TIPOS DE SUELO | CARBONO | NITROGENO | AMONIACO | PH | NITRIFICACION | MINERALIZACION | MICORRIZAS ARBUSCULARES VESICULARES | CICLO BIOGEOQUIMICO | ANALISIS DEL SUELO | BIOLOGIA DEL SUELO | BRASIL | COFFEA ARABICA | LIMING MATERIALS | LIMING | MICROBIOLOGICAL ANALYSIS | ORGANIC MATTER | BIOMASS | SOIL | CARBON | NITROGEN | AMMONIA | PH | NITRIFICATION | MINERALIZATION | VESICULAR ARBUSCULAR MYCORRHIZAE | CYCLING | SOIL ANALYSIS | SOIL BIOLOGY | BRAZIL | COFFEA ARABICA | AMENDEMENT CALCIQUE | CHAULAGE | ANALYSE MICROBIOLOGIQUE | MATIERE ORGANIQUE | BIOMASSE | SOL | CARBONE | AZOTE | AMMONIAC | PH | NITRIFICATION | MINERALISATION | MYCORHIZE A VESICULE ET ARBUSCULE | CYCLE BIOGEOCHIMIQUE | ANALYSE DE SOL | BIOLOGIE DU SOL | BRESIL In: Revista Brasileira de Ciencia do Solo (Brasil) v. 19(2) p. 191-196Summary: A field experiment was set up in October 1988 in Londrina, State of Paraná, Brazil, to determine the effect of lime rates, on coffee yields in a clayey Typic Harplorthox. The treatments were: control pH4.0; lime to neutralize exchangeable Al; lime to increase base saturation to 70; and lime to neutralize buffer extractable acidity (H exponente + + Al exponente 3+). Thirty months after lime application, soil samples were collected for chemical and microbiological analysis. Liming increased pH, Ca, Mg, K, and P; decreased Al exponente 3+ and did not change the total organic carbon. On the other hand, the lime increased biomass-C, microbial -C / organic-C ratio, number of ammonifiers and nitrifiers microrganisms, ammonification rate and nitrification potential. Effects of lime were not observed on mycorrhizal soil spores and coffee root colonization. Both microbial-C/ organic-C ratio and nitrogen mineralization were found to be indicators of changes in organic matter quality with lime.
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A field experiment was set up in October 1988 in Londrina, State of Paraná, Brazil, to determine the effect of lime rates, on coffee yields in a clayey Typic Harplorthox. The treatments were: control pH4.0; lime to neutralize exchangeable Al; lime to increase base saturation to 70; and lime to neutralize buffer extractable acidity (H exponente + + Al exponente 3+). Thirty months after lime application, soil samples were collected for chemical and microbiological analysis. Liming increased pH, Ca, Mg, K, and P; decreased Al exponente 3+ and did not change the total organic carbon. On the other hand, the lime increased biomass-C, microbial -C / organic-C ratio, number of ammonifiers and nitrifiers microrganisms, ammonification rate and nitrification potential. Effects of lime were not observed on mycorrhizal soil spores and coffee root colonization. Both microbial-C/ organic-C ratio and nitrogen mineralization were found to be indicators of changes in organic matter quality with lime.

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