PEMBUATAN PUPUK SRF (SLOW RELEASE FERTILIZER) DENGAN MENGGUNAKAN POLIMER AMILUM

Abstract

Slow Release Fertilizers (SRF) or controlled release fertilizers, has been widely used to overcome theconventional fertilizers use which are less efficient because the conventional fertilizer generally do not entirely absorbedinto plants. This research aims to make NPK (Nitrogen Potassium Phosfor) SRF (Slow Release Fertilizers) that canreduce the rate of release of nutrient with the coating and matrix method in a formulatory 13:8:10. The matrix used is anatural zeolite so its speed can be controlled while the coating method by dip coating using poly acrylic acid (PAA),additive starch and polyethylene glycol (PEG) 6000 as a template. The dip coating process is done to know the optimalconcentration of starch and PAA. Optimal starch concentration is 5% whereas for PAA is 20%. The Optimal NPK SRF isdone the test incubation applications for 100 days to know the rate of release of NPK SRF compared to granule andconventional fertilizer, then obtained results that SRF is slower and controlled compared with conventional fertilizers andgranule fertilizers.