Thumbnail Image

Bihar Agricultural University, Sabour

Bihar Agricultural University, Sabour established on 5th August, 2010 is a basic and strategic institution supporting more than 500 researchers and educationist towards imparting education at graduate and post graduate level, conducting basic, strategic, applied and adaptive research activities, ensuring effective transfer of technologies and capacity building of farmers and extension personnel. The university has 6 colleges (5 Agriculture and 1 Horticulture) and 12 research stations spread in 3 agro-ecological zones of Bihar. The University also has 21 KVKS established in 20 of the 25 districts falling under the jurisdiction of the University. The degree programmes of the university and its colleges have been accredited by ICAR in 2015-16. The university is also an ISO 9000:2008 certified organisation with International standard operating protocols for maintaining highest standards in teaching, research, extension and training.VisionThe Bihar Agricultural University was established with the objective of improving quality of life of people of state especially famers constituting more than two third of the population. Having set ultimate goal of benefitting society at large, the university intends to achieve it by imparting word-class need based agricultural education, research, extension and public service.

Browse

20161
Reset filters
Subject: Soil Science and Agriculture Chemistry × Author: Ahmed, Afzal × Thesis Type: M.Sc ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Efficacy of Potassium Solubilizing Bacteria on Waste mica in relation to Potassium uptake and dynamics under Maize rhizosphere
    (Department of Soil Science & Agricultural Chemistry, BAU, Sabour, 2016-07) Ahmed, Afzal; Chattopadhyaya, N.
    Potassium, third major element, originally known as Kelium (K), plays a vital role in plant growth and development. As potassium is extremely mobile within the plant system, it helps to regulate the opening and closing of stomata in the leaves and uptake of water by root cells. Indian soil has not been deficient in potassium since long .Non judicious application of inorganic nitrogenous fertilizer and omission of providing phosphatic and potassic fertilizers by peasant community due to inordinate price hike as well as preference to high yielding cultivars put the soil health at stake . To combat with this warning situation, resident microflora, present in the plant rhizosphere should be brought in to use to provide the bio-available potassium from fixed and unavailable pool of potassium by various mechanisms including acidolysis, chelation, exchange reactions, complexolysis, and production of organic acids. Therefore, the objective of this research is i) to study efficiency of potassium solubilizing microorganism and ii) to study the release kinetics of potassium from waste mica in maize rhizosphere. A pot experiment having 10 treatments {T1: Control, T2: Recommended Dose Of Fertilizer (RDF), T3: Full N and P+75% K and rest 25% by Waste Mica, T4: Full N and P+50% K and rest 50% by Waste Mica, T5: T3+KSB1(Fraturia aurantia), T6: T4+KSB1, T7: T3+KSB2 (Bacillus edaphicus),T8: T4+KSB2 T9: T3+KSB1+KSB2 and T10: T4+KSB1+KSB2 } was conducted using Maize (Var: SHM 1) as the test crop. The K solubilising power of the microorganisms showed a promising result (co-inoculation of two bacteria) in laboratory incubation and that was also observed in the results obtained from pot experiment. The observations were recorded at three different stages viz, Knee high stage, Silking stage and harvesting stage. The results revealed that the water soluble, exchangeable and non-exchangeable pools of K over different stages ranged from 3-5%, 9-10% and 85-88% respectively. Correlation studies among biomass yield, K uptake and different pools of K showed a significant relationship. T10 (T4+ KSB1+KSB2) has been found to be the best. It is observed that application of waste mica co-inoculated with potassium solubilizing microorganisms (Fraturia aurantia & Bacillus edaphicus) have a significant effect on biomass yield and potassium uptake by maize rhizosphere when waste mica, used as potassium source. Similarly, bacterial intervention of mica improves the water-soluble, exchangeable and non-exchangeable K pools in soils, thereby influences the K dynamics in a positive manner upon those pools and thus increased the bioavailability. Thus, bio-intervention of waste mica could be an alternative and viable technology to solubilize insoluble K into bio available form and could be used efficiently as a source of potassium bio-fertilizer for sustaining crop production.