+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Controlled-release NPK fertilizer encapsulated by polymeric membranes



Controlled-release NPK fertilizer encapsulated by polymeric membranes



Journal of Agricultural and Food Chemistry 51(2): 413-417



The commercial granular fertilizer NPK6-20-30 was coated using polysulfone (PSF), polyacrylonitrile (PAN), and cellulose acetate (CA). The coatings were formed from the polymer solutions by the phase inversion technique. Measurements of the thickness and porosity of the prepared coatings and a microphotographic observation of the coatings were performed. The physical properties of the coatings influence the release rate of macronutrients which are present in the core of the coated fertilizer. In the case of PAN coating with 60.45% porosity, prepared from a 16% polymer solution, 100% of NH(4)(+) and P(2)O(5) was released after 4 h of test and 99.7% of K(+) after 5 h of test, whereas in the case of coating with 48.8% porosity, 31.8% of NH(4)(+), 16.7% of P(2)O(5), and 11.6% of K(+) was released after 5 h. In all experiments, different selectivities of the coatings in terms of the release of components were observed. The release of potassium through the coatings made of PSF and PAN was the slowest. The same tendency was observed for the release of nitrogen through a coating of CA. The release of fertilizer active components was the slowest in the case of PSF. The lowest porosity coating was prepared from the 18% PSF solution.

(PDF emailed within 0-6 h: $19.90)

Accession: 004089011

Download citation: RISBibTeXText

PMID: 12517104

DOI: 10.1021/jf020800o


Related references

Promoting fertilizer use via controlled release of a bacteria-encapsulated film bag. Journal of Agricultural and Food Chemistry 58(10): 6300-6305, 2010

Spreader damage to encapsulated controlled-release fertilizer granules. Applied engineering in agriculture 17(4): 457-458, 2001

Cisplatin-encapsulated Polymeric Nanoparticles with Molecular Geometry-regulated Colloidal Properties and Controlled Drug Release. Acs Applied Materials & Interfaces: -, 2018

Controlled-release fertilizer of zinc encapsulated by a manganese hollow core shell. Soil Science & Plant Nutrition 61(2): 319-326, 2015

Effect of coating thickness on spreader damage to encapsulated controlled-release fertilizer granules. Applied engineering in agriculture 17(4): 459-460, 2001

Controlled release of fertilizer minerals by incapsulating membranes : 1. Factors influencing the rate of release. Soil Sci. Soc. Amer. Proc, 26: 579-583, 1962

Ferlent (R) - a Controlled Release Fertilizer Produced From a Polymeric MATERIAL WITH AGRONOMIC BENEFITS. Environmental Engineering and Management Journal 14(12): 2913-2917, 2015

NMR diffusion measurement in polymeric membranes used for controlled drug release. Acta Pharmaceutica Suecica 18(1): 35-44, 1981

The effect of some variables on the controlled release of chemicals from polymeric membranes. Scher, Herbert B (Ed ) Acs (American Chemical Society) Symposium Series, Vol 53 Controlled Release Pesticides 173rd Meeting Of The American Chemical Society, New Orleans, La , Usa, March 21-22, Ix+205p Illus American Chemical Society: Washington, D C , Usa ISBN 0-8412-0382-2: 152-167, 1977

In vitro characterization and optimization of polymeric membranes for controlled release applications. Pharmaceutical Research (New York) 8(10 SUPPL): S115, 1991

Effects of controlled-release nitrogen fertilizer and bag-controlled release fertilizer on utilization of 15N-urea in 'Orin' apple and its accumulation in soil. Ying Yong Sheng Tai Xue Bao 29(5): 1421-1428, 2018

Controlled drug release from polymeric delivery devices. II. Differentiation between partition-controlled and matrix-controlled drug release mechanisms. Journal of Pharmaceutical Sciences 63(4): 515-519, 1974

Controlled release of fertilizer minerals by incapsulating membranes. II. Efficiency of recovery, influence of soil moisture, mode of application, & other considerations related to use. Soil Sci. Soc. Amer. Proc, 26: 584-587, 1962

Controlled release of fertilizer minerals by in-capsulating membranes; II. Efficiency of recovery, influence of soil moisture, mode of application, and other considerations related to use. Soil Sci Soc Amer Proc 26(6): 584-587, 1962

Polymeric pesticides. IV. Research on polymeric controlled release pesticide formulations with LDPE and EVA. Chemosphere 2(9-10): 1327-1336, 1983