Influence of temperature, humidity and tillage in the Coal Organic Soil Semi-Arid Agricultural Subtropical
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Abstract
Soil is the major reservoir of terrestrial carbon and is fundamental in the maintenance of the global climate, contains two-thirds more carbon than the vegetal biomass and the double than the atmosphere. The carbon stored in soils diminishes greenhouses gases because it has persistence in them than in the biomass of the plants. The organic carbon content of the soils and its dynamics are the best indicator of their quality and agricultural productivity. In the subtropical is the greater number of ha agriculture’s. The objective was to determine the effects of tillage, temperature and humidity on organic carbon and respiratory rate in semi-arid subtropical agricultural soils. Sampling were in two agricultural soils, one from non-tillage conditions (NT) and other with conventional tillage (CT), in three depths (0-15, 15-35 and 35-45cm). Samples were submitted to different states of moisture (with and without watering) and temperature (ambient, 25, 35 and 45°C) under a controlled laboratory experiment on undisturbed soil cores separating the effects of temperature, drying–rewetting and decomposition dynamics on soil respiration and the potential of mineralization of the carbon the 7, 14, 21 and 28 days, catching the efflux CO2 with NaOH 1 N and titration with HCl 1N. CO2 content was higher in surface samples from NT soils whereas in CT soils the inverse was true. CO2 content from surface tended to decrease with the increase of temperature in humid soils whereas in deeper humidified soils the inverse was true. No trend in CO2 content was observed in dry soils. Respiratory rate was higher in CT than in NT soils, and tended to be lower in humid than in dry soils. Also, respiratory rate tended to decrease with the increase of temperature. Results highlight the advantage of non-tillage as a mean to increase sequestration of carbon in soils.
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References
Alvarez R. y Alvarez C.R. 2000. Soil organic matter pools and their associations with carbon mineralization kinetics. Soil Science Society of America Journal 64:184-189.
Alvarez R., Russo M.E., Prystupa P., Scheiner J.D., y Blotta L. 1998. Soil Carbon Pools under Conventional and No-Tillage Systems in the Argentine Rolling Pampa. Agronomy Journal 90:138-143.
Anderson J.P.E. 1982. Soil respiration p. 837–871, In Keeney D. R. E., ed. Methods of Soil Analysis, second ed. ASA and SSSA, Madison, WI.
Batjes N.H.y Sombroek W.G. 1997. Possibilities for carbon sequestration in tropical and subtropical soils. Global Change Biology 3:161-173.
Batjes N.H. 1996. Total carbon and nitrogen in the soils of the world. European Journal of Soil Science 47:151-163.
Blanco-Canqui H. y Lal R. 2004. Mechanisms of carbon sequestration in soil aggregates. Critical Reviews in Plant Sciences 23:481-504.
Bowman R.A., Reeder J.D. y Wienhold B.J. 2002. Quantifying laboratory and field variability to assess potential for carbon sequestration. Communications in Soil Science and Plant Analysis 33:1629-1642.
Conant R.T., Klopatek J.M. y Klopatek C.C. 2000. Environmental Factors Controlling Soil Respiration in Three Semiarid Ecosystems. Soil Sci. Soc. Am. J. 64:383–390.
Davison E.A. y Janssens I.A. 2006. Temperature sensitivity of soil carbon decomposition and feedbacks to climate change. Nature 440:165-173.
Dumanski J. 2003. Carbon sequestration, soil conservation, and the Kyoto protocol: Summary of implications. Climatic Change 65:255-261.
Estados Unidos Mexicanos. 2000. Norma Oficial Mexicana, que establece las
especificaciones de fertilidad, salinidad y clasificación de suelos, estudios,
muestreos y análisis., pp. 1-73 NOM-021-RECNAT, Vol. NOM. Secretaría de
Medio Ambiente y Recursos Naturales.
Fang C., Smith, P., Moncrieff, J. B. y Smith, J. U. 2005. Similar response of labile and
resistant soil organic matter pools to changes in temperature. Nature 433:57-58.
García E. 1976. Modificaciones a la Clasificación Climática de Köeppen para adaptarla a la Republica Mexicana In I. d. G. d. l. U. N. A. M. México, (ed.).
Gill J.L. 1988. Repeated measurement: Split-Plot trend analysis versus analysis of first differences. Biometrics 44:289-297.
Houghton R.A. 2003. Why are estimates of the terrestrial carbon balance so different? Global Change Biology 9:p.500-509.
IPCC 2001. Cambio Climático 2001: La base científica –– Contribución del Grupo de trabajo I al Tercer informe de evaluación del IPCC.
Kirschbaum M.U.F. 2004. Soil respiration under prolonged soil warming: are rate reductions caused by acclimation or substrate loss? Global Change Biology 10:1870-1877.
Lal R. 2004. Soil carbon sequestration to mitigate climate change. Geoderma 123:1-22.
Lal R. 2005. Soil carbon sequestration for sustaining agricultural production and improving the environment with particular reference to Brazil. Journal of Sustainable Agriculture 26:23-42.
Mandal B., Majumder B. Bandyopadhyay P.K., Hazra G.C., Gangopadhyay A., Samantaray R.N., Mishra A.K., Chaudhury J., Saha M.N. y Kundu S. 2007. The potential of cropping systems and soil amendments for carbon sequestration in soils under long-term experiments in subtropical India. Global Change Biology 13:357-369.
Martens D.A., Reedy T.E. y Lewi D.S. 2003. Soil organic carbon content and composition of 130-year crop, pasture and forest land-use managements. Global Change Biology 10:65-78.
Martens D.A., Emmerich W., McLain J.E.T. y Johsen T.N. 2005. Atmospheric carbon mitigation potential of agricultural management in the southwstern USA. Soil & Tillage Research 83:95-119.
Russell A.E., Laird D.A., Parkin T.B. y Mallarino A.P. 2005. Impact of nitrogen fertilization and cropping system on carbon sequestration in Midwestern Mollisols. Soil Science Society of America Journal 69:413-422.
Sa´ J.C., Cerri C.C., Dick W.A., Lal R., Filho S.P.V., Piccolo M.C. y. Feigl B.E. 2001. Organic Matter Dynamics and Carbon Sequestration Rates for a Tillage Chronosequence in a Brazilian Oxisol. Soil Sci. Soc. Am. J. 65:1486–1499.
SAS Institure. 1986. STAT User's Guide Release Release 6.12. Edition SAS Institure, Cary, NC. USA
.Six J., Conant R.T., Paul E.A. y Paustian K. 2002. Stabilization mechanisms of soil organic matter: Implications for C-saturation of soils. Plant and Soil 241:155–176.
Sponseller R.A. 2007. Precipitation pulses and soil CO2 flux in a Sonoran Desert ecosystem. Global Change Biology 13:426-436.
U.S.D.A. 1999. Guía para la Evaluación de la Calidad y Salud del Suelo. Primera ed. Instituto de Suelos CRN-CNIA-INTA, Argentina.
VandenBygaart A.J. y Kay B.D. 2004. Persistence of soil organic carbon after plowing a long-term no-till field in southern ontario, Canada. Soil Science Society of America Journal 68:1394-1402.
VandenBygaart A.J., Yang X.M., Kay B.D. y Aspinall J.D. 2002. Variability in carbon sequestration potential in no-till soil landscapes of southern Ontario. Soil & Tillage Research 65:231-241.
Vine E. 2004. Regulatory constraints to carbon sequestration terrestrial ecosystems and geologic formations: a California perspective. Mitigation and Adaptation Strategies for Global Change 9:77-95.
Wright A.L., Hons F.M. y Matocha J.E.J. 2005. Tillage impacts on microbial biomass and soil carbon and nitrogen dynamics of corn and cotton rotations. Applied Soil Ecology 29:85-92.