Studies on soil organic carbon and organic nitrogen fractions under different land use systems of Haryana

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dc.contributor.advisorDev Raj
dc.contributor.authorUsha Kumari
dc.date.accessioned2016-10-25T10:00:09Z
dc.date.available2016-10-25T10:00:09Z
dc.date.issued2016
dc.description.abstractA study on soil organic carbon and organic nitrogen fractions under different land use system of Haryana was carried out to evaluate the changes in soil quality caused by different land use systems at Department of Soil Science CCS HAU, Hisar. Different land use systems viz., cotton-wheat, ricewheat, sugarcane-sugarcane pearl millet-wheat (zero tillage), pearl millet-wheat (conventional tillage), citrus orchard, guava orchard and vegetables along with their uncultivated soils were selected for the study. Soil samples replicated five times were selected from each land use systems along with their uncultivated soils and analyzed for organic carbon and organic nitrogen fractions, available nutrients, pH, EC and CEC. The total organic carbon was found highest under horticulture land use system and highest content (9.72 g kg-1) was found in guava orchard, however, lowest 4.84 g kg-1 was observed under pearl millet-wheat land use system. About 39.66% higher organic carbon was observed under cultivated soils as compared to uncultivated soils. The highest microbial biomass carbon, light fraction carbon and heavy fraction carbon content was observed under guava orchard i.e. 238.14 mg kg-1, 1.76 g kg-1 and 7.51 g kg-1 ,while highest DOC content (386.00 mg kg-1 ) was found under cotton-wheat cropping system. Similarly, total hydrolysable nitrogen, amino acid-N, amino sugar-N, ammonia-N and hydrolysable unknown-N fractions of organic nitrogen found to vary as 347.20-1003.20, 133.20- 273.00, 74.60-165.60, 175.8-245.80, 71.00-372.00 and 170.90-576.4 mg kg-1 under different land use system in cultivated soils. All these fractions of organic nitrogen found higher under guava orchard while ammonia-N was noticed higher under sugarcane-sugarcane land use system. Both the organic carbon and organic nitrogen fractions were found higher in cultivated soils than uncultivated soil except dissolved organic carbon. Available nitrogen, phosphorus and sulphur was observed (26.92 %, 80.70 % and 150.15 % higher, respectively) higher in cultivated soils than uncultivated soils while potassium followed the reverse order having 34.66% lower content in cultivated soils. Zinc, iron and copper micronutrients content was found higher under cultivated soils than uncultivated soils while Mn content was noticed higher under uncultivated soils. Higher amount of manganese was observed under cotton-wheat, rice-wheat, sugarcane-sugarcane and pearl millet-wheat land use system in uncultivated soils while pearl millet-wheat, citrus, guava and vegetable land use system showed higher Mn content in cultivated soils. Available nutrient status of cultivated soils was observed higher where higher amount of fertilizers and manures are in practices.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/81700
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subSoil Science
dc.subjectOrganic carbon pools, Organic nitrogen fractions, Available nutrients, Land use systems, Cultivationen_US
dc.these.typeM.Sc
dc.titleStudies on soil organic carbon and organic nitrogen fractions under different land use systems of Haryanaen_US
dc.typeThesisen_US
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