Usage Of Chitosan-Silica with Crosslinking Agent As A Matrix For Slow Release Fertilizer

Abstract

Research with the title of the use of silica chitosan with glutaraldehyde crosslinking agents as a matrix in the making of slow release urea fertilizer has been done. The purpose of this research was to determine the physical and chemical properties of slow release fertilizer coated with chitosan-silica matrix and also glutaraldehyde with a concentration of 1%, 1.5% and also 2% (v/v). Physical properties are known by SEM where it has been seen that the matrix has covered the fertilizer, for the chemical properties of slow release fertilizer can be analyzed from functional groups by FTIR to see the interaction between fertilizer, matrix and glutaraldehyde crosslinking agents. Slow release fertilizer has also been tested for nitrogen release levels. From the test, the composition of slow release urea fertilizer with chitosan-silica matrix and glutaraldehyde 1% (v / v) is more stable than the matrix with glutaraldehyde 1.5% and 2% (v / v).

Pembuatan Zeolit Termodifikasi Heksadesiltrimetilamonium (Hdtma) Untuk Aplikasi Pupuk N Slow Release

“…Sifat pertukaran kation zeolit alam dapat ditingkatkan dengan memodifikasi permukaan secara kimia menggunakan senyawa, terutama anion [9] dan organik non-polar [10]. Salah satu senyawa yang digunakan yaitu amina kuaterner hexadecyltrimethylammonium (HDTMA) adalah surfaktan kationik rantai panjang yang memiliki muatan positif permanen .…”

“…Hasil pelepasan pupuk zeolite dengan modifikasi HDTMA yaitu sampel ZMS 1:1 pada hari pertama menghasilkan pelepasan Nitrogen yang paling kecil. Hal ini menandakan HDTMA dapat berfungsi sebagai crosslink pada zeolite yang dapat berikatan dengan Zeolit [10]. Namun pelepasan Nitrogen dengan pupuk zeolite HDTMA atau ZMS pada hari ke 1 sampai 7 menunjukkan kenaikan dibandingkan pupuk zeolite saja yang dimungkinkan akibat struktur kombinasi zeolite HDTMA yang kurang stabil.…”

Use of irradiated chitosan as a matrix for slow-release urea and in vitro fermentation characteristics of slow-release urea supplementation in ruminant rations

“…Chitosan has been successfully incorporated into slow-release urea (SRU) materials due to its biological activity and degree of acetylation. Chitosan has the potential to be used as a physical barrier that effectively minimizes the rate of water diffusion into the central nitrogen core [ 10 , 11 ] in SRU for fertilizer application. The addition of SRU to a ration containing a protein source protected by condensed tannin does not affect the activity of microbial protein synthesis in the rumen and enhances post-ruminal protein availability [ 12 ].…”