Smart fertilizers: preparation and characterization of gelatin-based hydrogels for controlled release of MAP and AN fertilizers

Pulat M., Yoltay N.

AGROCHIMICA, cilt.60, sa.4, ss.249-261, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 60 Sayı: 4
  • Basım Tarihi: 2016
  • Doi Numarası: 10.12871/00021857201641
  • Dergi Adı: AGROCHIMICA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.249-261
  • Anahtar Kelimeler: Ammonium nitrate, biodegradable hydrogel, controlled release fertilizer, gelatin, monoammonium phosphate, NPK COMPOUND FERTILIZER, ACRYLIC-ACID, DRUG-RELEASE, SWELLING DYNAMICS, CITRACONIC ACID, WATER-RETENTION, CHITOSAN, ACRYLAMIDE, NETWORK, MECHANISMS
  • Gazi Üniversitesi Adresli: Evet

Özet

To improve fertilizer use efficiency and minimize its negative impact on environment, controlled release fertilizer (CRF) systems were prepared. A series of biodegradable gelatin hydrogels was synthesized by using glutaraldehyde (GA) as crosslinker for controlled release of ammonium nitrate (AN) and monoammoni urn phosphate (MAP) fertilizers. Characteristics of the hydrogels were investigated by swelling and degradation experiments and SEM analysis. Increasing amount of GA/gelatin ratio caused the decrease in S% values from 332 to 218. Release of AN and MAP from gelatin hydrogels versus time was followed, and it is found that the release gently increased at first and then complied between 40-50 h. Zero order release kinetic was mention for the gelatin hydrogels/fertilizer systems prepared in this study.