Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop
The objective of this work was to evaluate the effect of two fertilizers on microbial biomass carbon, soil respiration and yield components of lettuce (Lactuca sativa L.). A field trial was carried out on a typic Hapludult soil located at Rio de Janeiro State, Brazil. On a completely randomized block design the effect of two fertilizers, urea and vermicomposting were analyzed, each one at three levels with all the possible combinations. The variables studied were microbial biomass carbon (MBC), soil respiration, qCO2 and dry matter yield. Seven samplings were performed during the crop cycle, from one month before transplanting to a few days after harvest. MBC and respiration values were higher during the first month following the manure incorporation and in plots where the highest levels of fertilizer were applied. These differences are observed during the first samplings, but later, they became practically insignificant. Probably, fertilizer losses were important. No differences were found in relation to the incorporation of vermicomposting. During the first three samplings organic carbon content was assessed. At the time of fertilizers incorporation, the highest values were obtained, but at the following sampling, their values decreased. The highest urea levels, the greatest yield. MBC contents are correlated with the aerial dry matter.
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Pesquisa Agropecuaria Brasileira
1998
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Costantini, Alejandro Segat, Andrea Almeida, Dejair Lopes de de-Polli, Helvécio |
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Costantini, Alejandro Segat, Andrea Almeida, Dejair Lopes de de-Polli, Helvécio Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop |
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Costantini, Alejandro Segat, Andrea Almeida, Dejair Lopes de de-Polli, Helvécio |
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Costantini, Alejandro |
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Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop |
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Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop |
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Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop |
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Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop |
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Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop |
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effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop |
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The objective of this work was to evaluate the effect of two fertilizers on microbial biomass carbon, soil respiration and yield components of lettuce (Lactuca sativa L.). A field trial was carried out on a typic Hapludult soil located at Rio de Janeiro State, Brazil. On a completely randomized block design the effect of two fertilizers, urea and vermicomposting were analyzed, each one at three levels with all the possible combinations. The variables studied were microbial biomass carbon (MBC), soil respiration, qCO2 and dry matter yield. Seven samplings were performed during the crop cycle, from one month before transplanting to a few days after harvest. MBC and respiration values were higher during the first month following the manure incorporation and in plots where the highest levels of fertilizer were applied. These differences are observed during the first samplings, but later, they became practically insignificant. Probably, fertilizer losses were important. No differences were found in relation to the incorporation of vermicomposting. During the first three samplings organic carbon content was assessed. At the time of fertilizers incorporation, the highest values were obtained, but at the following sampling, their values decreased. The highest urea levels, the greatest yield. MBC contents are correlated with the aerial dry matter. |
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Pesquisa Agropecuaria Brasileira |
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1998 |
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https://seer.sct.embrapa.br/index.php/pab/article/view/4817 |
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AT costantinialejandro effectofdifferentfertilizersonmicrobialbiomasscarbonrespirationandyieldunderalettucecrop AT segatandrea effectofdifferentfertilizersonmicrobialbiomasscarbonrespirationandyieldunderalettucecrop AT almeidadejairlopesde effectofdifferentfertilizersonmicrobialbiomasscarbonrespirationandyieldunderalettucecrop AT depollihelvecio effectofdifferentfertilizersonmicrobialbiomasscarbonrespirationandyieldunderalettucecrop AT costantinialejandro efectodediferentesfertilizantessobreelcarbonodebiomasamicrobianarespiracionyrendimientobajocultivodelechuga AT segatandrea efectodediferentesfertilizantessobreelcarbonodebiomasamicrobianarespiracionyrendimientobajocultivodelechuga AT almeidadejairlopesde efectodediferentesfertilizantessobreelcarbonodebiomasamicrobianarespiracionyrendimientobajocultivodelechuga AT depollihelvecio efectodediferentesfertilizantessobreelcarbonodebiomasamicrobianarespiracionyrendimientobajocultivodelechuga |
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rev-pab-br-article-48172014-11-10T17:53:23Z Effect of different fertilizers on microbial biomass carbon, respiration and yield under a lettuce crop Efecto de diferentes fertilizantes sobre el carbono de biomasa microbiana, respiración y rendimiento bajo cultivo de lechuga Efecto de diferentes fertilizantes sobre el carbono de biomasa microbiana, respiración y rendimiento bajo cultivo de lechuga Costantini, Alejandro Segat, Andrea Almeida, Dejair Lopes de de-Polli, Helvécio vermicomposting; urea; dry matter yield lombricompuesto; urea; rendimiento de materia seca lombricompuesto; urea; rendimiento de materia seca The objective of this work was to evaluate the effect of two fertilizers on microbial biomass carbon, soil respiration and yield components of lettuce (Lactuca sativa L.). A field trial was carried out on a typic Hapludult soil located at Rio de Janeiro State, Brazil. On a completely randomized block design the effect of two fertilizers, urea and vermicomposting were analyzed, each one at three levels with all the possible combinations. The variables studied were microbial biomass carbon (MBC), soil respiration, qCO2 and dry matter yield. Seven samplings were performed during the crop cycle, from one month before transplanting to a few days after harvest. MBC and respiration values were higher during the first month following the manure incorporation and in plots where the highest levels of fertilizer were applied. These differences are observed during the first samplings, but later, they became practically insignificant. Probably, fertilizer losses were important. No differences were found in relation to the incorporation of vermicomposting. During the first three samplings organic carbon content was assessed. At the time of fertilizers incorporation, the highest values were obtained, but at the following sampling, their values decreased. The highest urea levels, the greatest yield. MBC contents are correlated with the aerial dry matter. El presente trabajo tuvo como objetivo evaluar el efecto de dos fertilizantes sobre el carbono de la biomasa microbiana, la respiración y los componentes del rendimiento de la lechuga. Fue realizado un experimento a campo en un suelo Hapludult típico en el Estado de Río de Janeiro, Brasil. El esquema experimental fue en bloques al azar donde se analizó en factorial el efecto de los abonos (urea y lombricompuesto) en tres dosis. Los parámetros analizados fueron carbono de biomasa microbiana (CBM), respiración del suelo, qCO2 y rendimiento de materia seca de la lechuga. Se realizaron siete muestreos, desde un mes antes del transplante hasta postcosecha. Los valores de CBM y respiración fueron más altos durante el primer mes que siguió a la incorporación de los abonos, y también en las parcelas en que se aplicaron las dosis más altas de estos. Estas diferencias se manifestaron solamente en los primeros muestreos para tornarse luego insignificantes. Es probable que las pérdidas de fertilizante hayan sido muy altas. No se encontró diferencia significativa de la respiración del suelo en relación a la adición de lombricompuesto. Durante los primeros tres muestreos se determinó el contenido de carbono orgánico de las parcelas. En el momento de adición de los abonos se obtuvieron los valores más altos, disminuyendo en el muestreo siguiente. La producción de lechuga fue mayor con la aplicación de las dosis más altas de urea. El contenido de CBM correlacionó con la producción de materia seca. El presente trabajo tuvo como objetivo evaluar el efecto de dos fertilizantes sobre el carbono de la biomasa microbiana, la respiración y los componentes del rendimiento de la lechuga. Fue realizado un experimento a campo en un suelo Hapludult típico en el Estado de Río de Janeiro, Brasil. El esquema experimental fue en bloques al azar donde se analizó en factorial el efecto de los abonos (urea y lombricompuesto) en tres dosis. Los parámetros analizados fueron carbono de biomasa microbiana (CBM), respiración del suelo, qCO2 y rendimiento de materia seca de la lechuga. Se realizaron siete muestreos, desde un mes antes del transplante hasta postcosecha. Los valores de CBM y respiración fueron más altos durante el primer mes que siguió a la incorporación de los abonos, y también en las parcelas en que se aplicaron las dosis más altas de estos. Estas diferencias se manifestaron solamente en los primeros muestreos para tornarse luego insignificantes. Es probable que las pérdidas de fertilizante hayan sido muy altas. No se encontró diferencia significativa de la respiración del suelo en relación a la adición de lombricompuesto. Durante los primeros tres muestreos se determinó el contenido de carbono orgánico de las parcelas. En el momento de adición de los abonos se obtuvieron los valores más altos, disminuyendo en el muestreo siguiente. La producción de lechuga fue mayor con la aplicación de las dosis más altas de urea. El contenido de CBM correlacionó con la producción de materia seca. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 1998-01-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/4817 Pesquisa Agropecuaria Brasileira; v.33, n.1, jan. 1998; 71-76 Pesquisa Agropecuária Brasileira; v.33, n.1, jan. 1998; 71-76 1678-3921 0100-104x spa https://seer.sct.embrapa.br/index.php/pab/article/view/4817/6934 |