Advertisement

Biology and Fertility of Soils

, Volume 32, Issue 2, pp 102–108 | Cite as

Chemical and biological characteristics of alkaline saline soils from the former Lake Texcoco as affected by artificial drainage

  • M. L. Luna-Guido
  • R. I. Beltrán-Hernández
  • N.A. Solís-Ceballos
  • N. Hernández-Chávez
  • F. Mercado-García
  • J. A. Catt
  • V. Olalde-Portugal
  • L. Dendooven
ORIGINAL PAPER

Abstract

 Soils from the former Lake Texcoco are alkaline saline and were artificially drained and irrigated with sewage effluents since the late 1980s. Undrained soil and soil drained for 1, 5 and 8 years were sampled, characterized and incubated aerobically for 90 days at 22±1  °C while production of CO2, available P and concentrations of NH4+, NO2 and NO3 were monitored. Artificial drainage decreased pHH2O, water holding capacity, organic C, total N, and Na+, K+, Mg2+, B, Cl and SO42– concentrations, increased inorganic C and Ca2+ concentrations more than 5-fold while total P was not affected. Microbial biomass C decreased with increased length of drainage but bacteria, actinomycetes, denitrifiers and cellulose-utilizing bacteria tended to show opposite trends. CO2 production was less in soils drained ≥5 years compared to undrained soil but more than in soils drained for 1 year. Emission of NH3 was negligible and concentrations of NH4+ remained constant over time in each soil. Nitrification, as witnessed by increases in NO3 concentrations, occurred in soil drained for 8 years. NO2 concentrations decreased in soils drained ≤1 year in the first 7 days of the incubation and remained constant thereafter. It was found that artificial drainage of soils from the former Lake Texcoco profoundly affected soil characteristics. Decreases in pH and Na+, K+, Cl and SO42– concentrations made conditions more favourable for plant growth, although low concentrations of inorganic N and available P might be limiting factors.

Key words Alkaline saline soils Micro-organisms Characteristics C and N mineralization 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • M. L. Luna-Guido
    • 1
  • R. I. Beltrán-Hernández
    • 1
  • N.A. Solís-Ceballos
    • 1
  • N. Hernández-Chávez
    • 1
  • F. Mercado-García
    • 2
  • J. A. Catt
    • 3
  • V. Olalde-Portugal
    • 4
  • L. Dendooven
    • 1
  1. 1.Laboratory of Soil Ecology, Department of Biotechnology and Bioengineering, CINVESTAV-IPN, Av. Politécnico Nacional 2508, C.P. 07360, Apartado Postal 14740, C.P. 07000 Mexico D.F., Mexico e-mail: lucdendo@prodigy.net.mx Tel.: +52-5-7477000 Fax: +52-5-7477002MX
  2. 2.Comisión Nacional de Agua, Av. José Loreto Fabela 850, Col. San Juan de Aragón, C.P. 07950 Mexico D.F., MexicoMX
  3. 3.Department of Soil Science, IACR-Rothamsted, Harpenden, AL5 2JQ, UKGB
  4. 4.Department of Biotechnology and Biochemistry, CINVESTAV-IPN, Unidad Irapuato, A.P. 629, Irapuato, Guanajuato, MexicoMX

Personalised recommendations