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Dynamics of Micronutrient Cations in Soil-Plant System as Influenced By Long-Term Application of Chemical Fertilizers and Amendments in an Acid Alfisol

CSK Himachal Pradesh Agricultural University Repository

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Title Dynamics of Micronutrient Cations in Soil-Plant System as Influenced By Long-Term Application of Chemical Fertilizers and Amendments in an Acid Alfisol
 
Creator Shambhavi, Shweta
 
Subject 631.81 Nutritive Principles, Complete Fertilizers, Methods of Application
 
Description The present investigation was carried out in the on going long-term fertilizer experiment initiated during 1972 at experimental farm of College of Agriculture CSK HPKV, Palampur in randomized block design with eleven treatments replicated three times. The soil of the experimental area was silty loam, acidic in reaction and taxonomically classified as "Typic Hapludalfs". Surface (0.0-0.20 m) and subsurface (0.20-0.40 m) soil samples taken after the harvest of maize (kharif, 2008) were analysed for pools of micronutrient cations (Fe, Mn, Zn and Cu) and various chemical indicies of soil quality. Continuous use of chemical fertilizers and amendments for the last 36 years in maize-wheat system in an acid Alfisol brought out marked depletion in the pools of all the micronutrient cations except Cu as compared to buffer plots. All the pools of Fe, Mn, Zn and Cu were noticeably higher in FYM amended plots compared to zero-fertilized plots. Although, residual fraction of all the micronutrient cations was found to be the most dominant fraction but organically bound and exchangeable forms were found to play major role in the nutrient supply and crop productivity and nutrients. uptake. Highest productivity of maize (2008) and wheat (2008-09) was recorded under 100% NPK + FYM treatment. FYM and lime treatments resulted in significantly higher uptake of all the nutrients by both the crops compared to other treatments. Organically bound fraction of all the micronutrient cations studied was found to have highest significant and positive correlation with yield and nutrient uptake of maize and wheat crops. Further, regression analysis studies too revealed that organic form of all the micronutrients was the most important pool contributing towards the variation in the above parameters. While, exchangeable and organically bound forms contributed significantly towards DTPA-extractable micronutrient cations.
 
Date 2011
 
Type Thesis
NonPeerReviewed
 
Format text
 
Language en
 
Identifier http://hillagricrepository.co.in/838/1/SHWETA%20SHAMBHAVI.pdf
Shambhavi, Shweta (2011) Dynamics of Micronutrient Cations in Soil-Plant System as Influenced By Long-Term Application of Chemical Fertilizers and Amendments in an Acid Alfisol. PhD thesis thesis, CSKHPKV Palampur.