NUTRIENT RELEASE AND BIOLOGICAL ACTIVITY OF SOILS INCORPORATED WITH CEREAL CROP RESIDUES

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dc.contributor.advisorPRASUNA RANI, P
dc.contributor.authorCHOWDARY KANITI, S.P.
dc.date.accessioned2018-05-08T05:26:50Z
dc.date.available2018-05-08T05:26:50Z
dc.date.issued2016
dc.descriptionD5296en_US
dc.description.abstractA green house experiment entitled “Nutrient release and biological activity of soils incorporated with cereal crop residues" was conducted at Department of Soil Science and Agricultural Chemistry, Agricultural College, Bapatla, during kharif, 2013 to study the influence of crop residues and their composts on soil properties and performance of rice in terms of yield and nutrient uptake. The test soil was non-saline, clay in texture and neutral in reaction. The soil was medium in organic carbon, low in available nitrogen, medium in phosphorus, high in potassium and sufficient in sulphur status. All the micronutrients were above the critical limit except zinc. The experiment was laid out in CRD with nine treatments replicated thrice. The treatments comprised of T1 - 100% RDFN, T2 - 100% RDFN+ 25% N through paddy straw, T3 - 100% RDFN+ 25% N through paddy compost, T4 - 100% RDFN + 25% N through maize stalk, T5 - 100% RDFN+ 25% N through maize compost, T6 -75% RDFN+ 25% N through paddy straw, T7 -75% RDFN+ 25% N through paddy compost, T8 - 75% RDFN+ 25% N through maize stalk and T9 - 75% RDFN+ 25% N through maize compost. Crop residues and prepared composts were applied to soil as per the treatments based on their nitrogen content 15 days before transplanting of rice seedlings. Nitrogen was applied in three splits as per the treatments in the form of urea. Phosphorus (basal) and potassium (two equal splits) were applied in the form of SSP and muriate of potash, respectively to all the treatments. The influence of various treatments on soil properties (physical, physicochemical properties, available nutrients and biological activity) and performance of rice (yield and nutrient uptake) were determined by standard procedures at different stages. Application of inorganics alone or in combination with crop residues or composts didn’t show marked difference in bulk density, pH, EC and CEC of the soils. However, the treatments supplied with inorganic fertilizer in combination with crop residues or composts resulted in significant increase in organic carbon content and improved water holding capacity of the soil over no residue treatment (100% RDFN). Application of 100 % RDFN+ 25% N though maize compost was found to be superior in maintaining maximum mineral nitrogen and available nutrient contents. The microbial population (bacteria, fungi and actinomycetes) and enzyme activity (dehydrogenase) of soil in treatments supplied with cereal crop residues and composts in all combinations (T2 to T9) were found to be statistically higher than only inorganic treatment at all crop growth stages. The treatments, which received 25% N through crop residue composts (T3, T5, T7 and T9) recorded relatively higher values than the raw crop residue treatments (T2, T4, T6 andT8). The performance of rice in terms of drymatter production, grain and straw yields was significantly influenced by the treatments. The treatment supplied with 100% RDFN + 25% N through maize compost recorded maximum drymatter production, grain and straw yield. The same treatment resulted in significantly higher uptake of all nutrients and it was followed by treatment supplied with 100% RDFN + 25% N through paddy compost.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810044918
dc.keywordsSOILS, CEREALen_US
dc.language.isoen_USen_US
dc.pages147en_US
dc.publisherAcharya N.G. Ranga Agricultural Universityen_US
dc.research.problemNUTRIENT RELEASE AND BIOLOGICAL ACTIVITY OF SOILS INCORPORATED WITH CEREAL CROP RESIDUESen_US
dc.subSoil Science and Agriculture Chemistryen_US
dc.subjectnullen_US
dc.themeNUTRIENT RELEASE AND BIOLOGICAL ACTIVITY OF SOILS INCORPORATED WITH CEREAL CROP RESIDUESen_US
dc.these.typeM.Scen_US
dc.titleNUTRIENT RELEASE AND BIOLOGICAL ACTIVITY OF SOILS INCORPORATED WITH CEREAL CROP RESIDUESen_US
dc.typeThesisen_US
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