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Products Based on Bio-Resourced Materials for Agriculture. Radiation Processed Biodegradable Polymers, Plant Growth Promoters and Superabsorbent Polymers. Chapter 9

Abstract

Radiation-processed natural polymers and their derivatives, namely starch, alginate, chitosan and carboxymethyl cellulose (CMC) were explored for different agricultural applications such as biodegradable mulch films, super adsorbent polymers (SAPs), and plant growth promoters (PGPs). It was observed that gamma radiation-processed starch can lead to a better processability of starch/synthetic polymer alloys, and can offer tuneable biodegradability (as low as one month) with acceptable physico-mechanical properties. Acrylic acid/CMC-based SAP was prepared using {sup 60}Co gamma radiation, for soil conditioning. The equilibrium degree of swelling (EDS) of the acrylic acid/CMC SAP was found to be 460 g/g. The field trial of the SAP was conducted on sorghum. It was found that, with the use of 20 kg/ha of SAP, the crop yield can be increased by almost 18.5% whereas the increase in plant height was 8.5%. A new super adsorbent polymer with a much higher water uptake capacity was also developed by adding a small fraction of carrageenan to neutralized acrylic acid (AA). This SAP had EDS of 800 g/g, with the addition of only 1% carrageenan. Experiments to check the soil conditioning efficacy of AA/carrageenan SAP are in progress. Oligomers of chitosan and alginates were prepared by gamma irradiation and were  More>>
Authors:
Dubey, K. A.; Bhardwaj, Y. K.; Chaudhari, C. V.; Varshney, L. [1] 
  1. Radiation Technology Development Division, Bhabha Atomic Research Centre (India)
Publication Date:
Jul 15, 2014
Product Type:
Conference
Report Number:
IAEA-TECDOC-1745
Resource Relation:
Conference: Technical Meeting on Radiation Processed Materials in Products from Polymers for Agricultural Applications, Vienna (Austria), 8-12 Jul 2013; Other Information: 19 refs., 3 tabs., 4 figs.; Related Information: In: Radiation Processed Materials in Products from Polymers for Agricultural Applications| 222 p.
Subject:
60 APPLIED LIFE SCIENCES; ACRYLIC ACID; ADSORBENTS; AGRICULTURE; ALGINATES; ALLOYS; AMINO ACIDS; BEANS; COBALT 60; CROPS; GAMMA RADIATION; LEMONS; MECHANICAL PROPERTIES; OIL YIELDS; OLIGOSACCHARIDES; PLANT GROWTH; POLYMERS; SORGHUM; STARCH; VIGNA; WHEAT
OSTI ID:
22304753
Research Organizations:
International Atomic Energy Agency, Radioisotope Products and Radiation Technology Section,Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISBN 978-92-0-106414-1; ISSN 1011-4289; TRN: XA14M6842010925
Availability:
Available from INIS in electronic form. Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/TE-1745_web.pdf; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 75-85
Announcement Date:
Jan 31, 2015

Citation Formats

Dubey, K. A., Bhardwaj, Y. K., Chaudhari, C. V., and Varshney, L. Products Based on Bio-Resourced Materials for Agriculture. Radiation Processed Biodegradable Polymers, Plant Growth Promoters and Superabsorbent Polymers. Chapter 9. IAEA: N. p., 2014. Web.
Dubey, K. A., Bhardwaj, Y. K., Chaudhari, C. V., & Varshney, L. Products Based on Bio-Resourced Materials for Agriculture. Radiation Processed Biodegradable Polymers, Plant Growth Promoters and Superabsorbent Polymers. Chapter 9. IAEA.
Dubey, K. A., Bhardwaj, Y. K., Chaudhari, C. V., and Varshney, L. 2014. "Products Based on Bio-Resourced Materials for Agriculture. Radiation Processed Biodegradable Polymers, Plant Growth Promoters and Superabsorbent Polymers. Chapter 9." IAEA.
@misc{etde_22304753,
title = {Products Based on Bio-Resourced Materials for Agriculture. Radiation Processed Biodegradable Polymers, Plant Growth Promoters and Superabsorbent Polymers. Chapter 9}
author = {Dubey, K. A., Bhardwaj, Y. K., Chaudhari, C. V., and Varshney, L.}
abstractNote = {Radiation-processed natural polymers and their derivatives, namely starch, alginate, chitosan and carboxymethyl cellulose (CMC) were explored for different agricultural applications such as biodegradable mulch films, super adsorbent polymers (SAPs), and plant growth promoters (PGPs). It was observed that gamma radiation-processed starch can lead to a better processability of starch/synthetic polymer alloys, and can offer tuneable biodegradability (as low as one month) with acceptable physico-mechanical properties. Acrylic acid/CMC-based SAP was prepared using {sup 60}Co gamma radiation, for soil conditioning. The equilibrium degree of swelling (EDS) of the acrylic acid/CMC SAP was found to be 460 g/g. The field trial of the SAP was conducted on sorghum. It was found that, with the use of 20 kg/ha of SAP, the crop yield can be increased by almost 18.5% whereas the increase in plant height was 8.5%. A new super adsorbent polymer with a much higher water uptake capacity was also developed by adding a small fraction of carrageenan to neutralized acrylic acid (AA). This SAP had EDS of 800 g/g, with the addition of only 1% carrageenan. Experiments to check the soil conditioning efficacy of AA/carrageenan SAP are in progress. Oligomers of chitosan and alginates were prepared by gamma irradiation and were tried as plant growth promoters in wheat (Triticum aestivum), mung bean (Vigna radiata), linseed (Linum usitatissimum), mentha (Mentha arvensis), and lemon grass. The results suggest that these oligomers have a significant impact on the grain and oil yield. Large scale field trials on Mentha arvensis in collaboration with an industry are in progress, and efforts are going on to formulate a policy framework for the use of oligosaccharides as plant growth promoters. (author)}
place = {IAEA}
year = {2014}
month = {Jul}
}