Khormali, F and Wani, S P and Srinivasa Rao, Ch (2007) Carbon and Nitrogen Stocks of the Soils of different climatic regions of Golestan Province, Iran. In: Proceedings of International Symposium on Organic Matter Dynamics in Agro-Ecosystems., 16th to 19th July 2007, Poitiers, France.
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Abstract
Some biological soil quality indicators i.e. soil respiration, microbial biomass, biomass nitrogen, C:N, net mineralization, population of the microorganisms together with total carbon, organic carbon, inorganic carbon and total nitrogen were studied to investigate their variatiou in different climatic regions of Golestan province, northeast Iran. Fourteen soil profiles were dug and described on three climatic regions namely: Aridie-thermic, xeric-thermic and udic-mesic soil moisture and temperature regimes. All the studied soils formed on loess or loess-derived parent materiaL Natural vegetation varies from sparse rangelands in the northern arid parts to dense deciduous forest in the southern humid regions of north-facing slopes of the Alborz mountain ranges. The studied soils were classified as Aridisols and Entisols in the aridic moisture regimes, Inceptisols and Mollisols in the xeric moisture regimes and Alfisols in the udic moisture regime regions. The results revealed that organic carbon and total nitrogen increased while inorganic carbon decreased with increasing precipitation. Soil inorganiC carbon and consequently pH decreased with increasing precipitation. Biological soil quality attributes such as soil respiratioIL, biomass carbon and nitrogen increased sharply from aridic to xeric regions but decreased gradually in the udic regions. This trend was in accordance with the population of bacteria and actinomycetes. The xeric-thermic moisture and temperature regimes has provided favourable soil environment with regard to the available moisture and temperature both for the population of .microorganisms and also the vegetative cover which both are responsible for the biomass production
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Divisions: | UNSPECIFIED |
| CRP: | UNSPECIFIED |
| Subjects: | Others > Soil Science Others > Fertilizer Applications |
| Depositing User: | Mr Sanat Kumar Behera |
| Date Deposited: | 04 Nov 2011 13:23 |
| Last Modified: | 04 Nov 2011 13:23 |
| URI: | http://oar.icrisat.org/id/eprint/3672 |
| Acknowledgement: | UNSPECIFIED |
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