A New Class of Clay Polymer Composite Films as Seed Coating Material for the Extended Release of Micronutrient, Fe+2
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 3
Abstract
The world demand for fertilizer in general is increasing day by day. Surface feeding is the most common practice of providing micronutrients to the growing plants. In spite of its popularity and widespread use, the method suffers from disadvantages; excessive use of micronutrients and decreased efficiency of nutrient utilization. Therefore, there is an urgent need to prevent the excessive use and waste of micronutrients. Micronutrients are required in the early stage (2-3 weeks) of the plant’s growth; hence, it is desirable that micronutrients are made available in the vicinity of the seedlings and growing plants. In order to overcome these drawbacks attempts has been made to design a micronutrient (Fe+2) containing biodegradable polymeric film as a seed coating material to provide an extended release of Fe+2 in the immediate vicinity of the seed when it is sown in the soil. The synthesized films have been characterized by XRD, FTIR and TGA technique, since; water constitutes a basic requirement for germination. Therefore, barrier properties of films have also been investigated. It has been found that the Mt starch glycerol composite film attains 79% swelling capacity in water within 28 hours. The film also possesses good pore volume and water vapor permeability. The time dependent cumulative release of Fe+2 in an aqueous soil extract was monitored for the starch glycerol film and clay (Montmorillonite, Bentonite and Vermiculite) starch glycerol composite films. Mt starch glycerol composite film was found to be the best with76% of the cumulative release of Fe+2 in an extended manner for15 days. This Fe+2 containing Mt starch glycerol composite film was used for coating wheat seeds. The coated and uncoated seeds were sown in normal and deficient soils, results indicate better crop production from the coated seeds. This work will be published separately
Authors and Affiliations
Priyanka Kumari, Monika Datta
Keywords
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