A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India
This study investigated microbial biomass-N (MB-N) and N-mineralization in soils of four different vegetation systems including forest (sal), mixed forest, savanna and cropland ecosystems in the Vindhyan region, India. A change was noted in the above region due to physiographic differences and anthr...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Czech Academy of Agricultural Sciences
2009-06-01
|
| Series: | Plant, Soil and Environment |
| Subjects: | |
| Online Access: | https://pse.agriculturejournals.cz/artkey/pse-200906-0001_a-comparative-account-of-the-microbial-biomass-n-and-n-mineralization-of-soils-under-natural-forest-grassland.php |
| _version_ | 1797898291776585728 |
|---|---|
| author | Jay S. Singh D.P. Singh A.K. Kashyap |
| author_facet | Jay S. Singh D.P. Singh A.K. Kashyap |
| author_sort | Jay S. Singh |
| collection | DOAJ |
| description | This study investigated microbial biomass-N (MB-N) and N-mineralization in soils of four different vegetation systems including forest (sal), mixed forest, savanna and cropland ecosystems in the Vindhyan region, India. A change was noted in the above region due to physiographic differences and anthropogenic disturbances. Annually the soil moisture (SM) content across the different study sites ranged from 7.5 to 24.3% being maximum in forest sites compared to savanna and cropland sites. The NH4+-N, NO -3 -N and MB-N concentrations varied from 4.3 to 10.2 μg/g, 1.1 to 5.8 μg/g and 21.3 to 90.2 μg/g dry soil, respectively, with minimum values in the wet and maximum values in the dry season. The trend of seasonal variation in net N-mineralization was similar to that of moisture content but counter to the concentrations of inorganic-N and MB-N. The net N-mineralization rates at different investigated sites ranged from 4.5 to 37.6 μg/g month. Cultivation reduced the N-mineralization and MB-N by 58.5% and 63.5%, respectively. Experiments showed that the percentage contribution of MB-N to total-N was 8.01 to 19.15%. MB-N was positively correlated with the inorganic-N (n = 180,r.80,P < 0.001) but negatively with soil moisture (n = 180, r = 0.79, P < 0.001) and net N-mineralization rates (n = 180, r = 0.92, P < 0.0001). The higher N-mineralization and MB-N in the soil of forest ecosystem was reported compared to savanna and cropland and the order of soil MB-N levels and net N-mineralization followed the sequence: forest (sal) > mixed forest > savanna > cropland. |
| first_indexed | 2024-04-10T08:12:12Z |
| format | Article |
| id | doaj.art-9c43c52da23f4c49b6972a2effeb8cec |
| institution | Directory Open Access Journal |
| issn | 1214-1178 1805-9368 |
| language | English |
| last_indexed | 2024-04-10T08:12:12Z |
| publishDate | 2009-06-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Plant, Soil and Environment |
| spelling | doaj.art-9c43c52da23f4c49b6972a2effeb8cec2023-02-23T03:45:31ZengCzech Academy of Agricultural SciencesPlant, Soil and Environment1214-11781805-93682009-06-0155622323010.17221/1021-PSEpse-200906-0001A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, IndiaJay S. Singh0D.P. Singh1A.K. Kashyap2Department of Environmental Science, Babasaheb Bhimrao Ambedkar (Central) University, Raibareli Road, Lucknow, IndiaDepartment of Environmental Science, Babasaheb Bhimrao Ambedkar (Central) University, Raibareli Road, Lucknow, IndiaDepartment of Botany, Banaras Hindu University, Varanasi, IndiaThis study investigated microbial biomass-N (MB-N) and N-mineralization in soils of four different vegetation systems including forest (sal), mixed forest, savanna and cropland ecosystems in the Vindhyan region, India. A change was noted in the above region due to physiographic differences and anthropogenic disturbances. Annually the soil moisture (SM) content across the different study sites ranged from 7.5 to 24.3% being maximum in forest sites compared to savanna and cropland sites. The NH4+-N, NO -3 -N and MB-N concentrations varied from 4.3 to 10.2 μg/g, 1.1 to 5.8 μg/g and 21.3 to 90.2 μg/g dry soil, respectively, with minimum values in the wet and maximum values in the dry season. The trend of seasonal variation in net N-mineralization was similar to that of moisture content but counter to the concentrations of inorganic-N and MB-N. The net N-mineralization rates at different investigated sites ranged from 4.5 to 37.6 μg/g month. Cultivation reduced the N-mineralization and MB-N by 58.5% and 63.5%, respectively. Experiments showed that the percentage contribution of MB-N to total-N was 8.01 to 19.15%. MB-N was positively correlated with the inorganic-N (n = 180,r.80,P < 0.001) but negatively with soil moisture (n = 180, r = 0.79, P < 0.001) and net N-mineralization rates (n = 180, r = 0.92, P < 0.0001). The higher N-mineralization and MB-N in the soil of forest ecosystem was reported compared to savanna and cropland and the order of soil MB-N levels and net N-mineralization followed the sequence: forest (sal) > mixed forest > savanna > cropland.https://pse.agriculturejournals.cz/artkey/pse-200906-0001_a-comparative-account-of-the-microbial-biomass-n-and-n-mineralization-of-soils-under-natural-forest-grassland.phpdry tropical forestcroplandmicrobial biomassn-mineralizationsoil moisture |
| spellingShingle | Jay S. Singh D.P. Singh A.K. Kashyap A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India Plant, Soil and Environment dry tropical forest cropland microbial biomass n-mineralization soil moisture |
| title | A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India |
| title_full | A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India |
| title_fullStr | A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India |
| title_full_unstemmed | A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India |
| title_short | A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India |
| title_sort | comparative account of the microbial biomass n and n mineralization of soils under natural forest grassland and crop field from dry tropical region india |
| topic | dry tropical forest cropland microbial biomass n-mineralization soil moisture |
| url | https://pse.agriculturejournals.cz/artkey/pse-200906-0001_a-comparative-account-of-the-microbial-biomass-n-and-n-mineralization-of-soils-under-natural-forest-grassland.php |
| work_keys_str_mv | AT jayssingh acomparativeaccountofthemicrobialbiomassnandnmineralizationofsoilsundernaturalforestgrasslandandcropfieldfromdrytropicalregionindia AT dpsingh acomparativeaccountofthemicrobialbiomassnandnmineralizationofsoilsundernaturalforestgrasslandandcropfieldfromdrytropicalregionindia AT akkashyap acomparativeaccountofthemicrobialbiomassnandnmineralizationofsoilsundernaturalforestgrasslandandcropfieldfromdrytropicalregionindia AT jayssingh comparativeaccountofthemicrobialbiomassnandnmineralizationofsoilsundernaturalforestgrasslandandcropfieldfromdrytropicalregionindia AT dpsingh comparativeaccountofthemicrobialbiomassnandnmineralizationofsoilsundernaturalforestgrasslandandcropfieldfromdrytropicalregionindia AT akkashyap comparativeaccountofthemicrobialbiomassnandnmineralizationofsoilsundernaturalforestgrasslandandcropfieldfromdrytropicalregionindia |