Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil

J.E. Celis, M. Sandoval, B. Martínez, and C. Quezada. 2013. Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil. Cien. Inv. Agr. 40(3): 571-580. An understanding of soil carbon stocks and fluxes in saline-sodic soils is becoming critical in env...

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Autores principales:	Celis,José E, Sandoval,Marco, Martínez,Bárbara, Quezada,Celerino
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2013
Materias:	Arid soil biological activity gypsum organic matter sewage sludge soil respiration
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300010
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spelling	oai:scielo:S0718-162020130003000102014-09-08Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soilCelis,José ESandoval,MarcoMartínez,BárbaraQuezada,Celerino Arid soil biological activity gypsum organic matter sewage sludge soil respiration J.E. Celis, M. Sandoval, B. Martínez, and C. Quezada. 2013. Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil. Cien. Inv. Agr. 40(3): 571-580. An understanding of soil carbon stocks and fluxes in saline-sodic soils is becoming critical in environmental management because salinity and sodicity are predicted to increase worldwide. The effects of amendment with sewage sludge (SW), mined gypsum (MG) and synthetic gypsum (SG) on the soil respiration rate and soil (S) microbial biomass (SMB) of a saline-sodic soil were assessed in vitro over 60 days under controlled conditions. The treatments were: T1 = S + MG (7 t ha-1); T2 = S + MG (7 t ha-1) + SW (90 t ha-1); T3 = S + SG (7 t ha-1); T4 = S + SG (7 t ha-1) + SW (90 t ha-1); T5 = S + SW (90 t ha-1); T6 = S + SW (270 t ha-1); T0 = Control (unamended soil). Soil respiration rates were determined by a respirometry method in a closed incubation chamber. SMB was measured by the chloroform fumigation-extraction procedure. The results showed that the highest respiration rate occurred when soil was amended with T6, followed by T5. Microbial respiration was the lowest with T1 and T3. The gypsum amendments did not significantly increase soil respiration, due to low organic matter (OM) intake. All treatments showed a gradual decrease of SMB over the 60-day incubation period. The saline-sodic soil was able to respond positively to large amounts of added sewage sludge, up to 270 t ha-1.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.40 n.3 20132013-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300010en10.4067/S0718-16202013000300010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Arid soil biological activity gypsum organic matter sewage sludge soil respiration
spellingShingle	Arid soil biological activity gypsum organic matter sewage sludge soil respiration Celis,José E Sandoval,Marco Martínez,Bárbara Quezada,Celerino Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil
description	J.E. Celis, M. Sandoval, B. Martínez, and C. Quezada. 2013. Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil. Cien. Inv. Agr. 40(3): 571-580. An understanding of soil carbon stocks and fluxes in saline-sodic soils is becoming critical in environmental management because salinity and sodicity are predicted to increase worldwide. The effects of amendment with sewage sludge (SW), mined gypsum (MG) and synthetic gypsum (SG) on the soil respiration rate and soil (S) microbial biomass (SMB) of a saline-sodic soil were assessed in vitro over 60 days under controlled conditions. The treatments were: T1 = S + MG (7 t ha-1); T2 = S + MG (7 t ha-1) + SW (90 t ha-1); T3 = S + SG (7 t ha-1); T4 = S + SG (7 t ha-1) + SW (90 t ha-1); T5 = S + SW (90 t ha-1); T6 = S + SW (270 t ha-1); T0 = Control (unamended soil). Soil respiration rates were determined by a respirometry method in a closed incubation chamber. SMB was measured by the chloroform fumigation-extraction procedure. The results showed that the highest respiration rate occurred when soil was amended with T6, followed by T5. Microbial respiration was the lowest with T1 and T3. The gypsum amendments did not significantly increase soil respiration, due to low organic matter (OM) intake. All treatments showed a gradual decrease of SMB over the 60-day incubation period. The saline-sodic soil was able to respond positively to large amounts of added sewage sludge, up to 270 t ha-1.
author	Celis,José E Sandoval,Marco Martínez,Bárbara Quezada,Celerino
author_facet	Celis,José E Sandoval,Marco Martínez,Bárbara Quezada,Celerino
author_sort	Celis,José E
title	Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil
title_short	Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil
title_full	Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil
title_fullStr	Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil
title_full_unstemmed	Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil
title_sort	effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300010
work_keys_str_mv	AT celisjosee effectoforganicandmineralamendmentsuponsoilrespirationandmicrobialbiomassinasalinesodicsoil AT sandovalmarco effectoforganicandmineralamendmentsuponsoilrespirationandmicrobialbiomassinasalinesodicsoil AT martinezbarbara effectoforganicandmineralamendmentsuponsoilrespirationandmicrobialbiomassinasalinesodicsoil AT quezadacelerino effectoforganicandmineralamendmentsuponsoilrespirationandmicrobialbiomassinasalinesodicsoil
_version_	1714202152603222016

Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil

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