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http://digitalrepository.fccollege.edu.pk/handle/123456789/1367
Title: | Microbial biomass and mineralization-immobilization of nitrogen in some agricultural soils |
Authors: | Azam, F. Malik, Dr. Kauser .A. Hussain, F. |
Keywords: | microbial biomass |
Issue Date: | Jul-1986 |
Publisher: | Spinger Link |
Citation: | Azam, F., Malik, K.A. & Hussain, F. Microbial biomass and mineralization-immobilization of nitrogen in some agricultural soils. Biol Fert Soils 2, 157–163 (1986). https://doi.org/10.1007/BF00257595 |
Series/Report no.: | Biol Fert Soils 2, 157–163 (1986).; |
Abstract: | The chloroform fumigation-incubation method (CFIM) was used to measure the microbial biomass of 17 agricultural soils from Punjab Pakistan which represented different agricultural soil series. The biomass C was used to calculate biomass N and the changes occurring in NH4 +-N and NO3 −-N content of soils were studied during the turnover of microbial biomass or added C source. Mineral N released in fumigated-incubated soils and biomass N calculated from biomass C was correlated with some N availability indexes. The soils contained 427–1240 kg C as biomass which represented 1.2%–6.9% of the total organic C in the soils studied. Calculations based on biomass C showed that the soils contained 64–186 kg N ha−1 as microbial biomass. Immobilization of NCO3 −-N was observed in different soils during the turnover of microbial biomass and any net increase in mineral N content of fumigated incubated soils was attributed entirely to NH4 +-N. Biomass N calculated from biomass C showed non-significant correlation with different N availability indexes whereas mineral N accumulated in fumigated-incubated soils showed highly significant correlations with other indexes including N uptake by plants. |
Description: | https://doi.org/10.1007/BF00257595 |
URI: | http://localhost:8080/xmlui/handle/123456789/1367 |
Appears in Collections: | School of Life Sciences |
Files in This Item:
File | Description | Size | Format | |
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Microbial biomass and mineralization-immobilization of nitrogen.pdf | 2.75 MB | Adobe PDF | View/Open |
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