Mechanochemical Synthesis of Slow‐Release Fertilizers through Incorporation of Alumina Composition into Potassium/Ammonium Phosphates

Abstract

Synthesis of potassium/ammonium phosphates and alumina composites through a mechanochemical approach is presented for the first time. γ‐alumina and the phosphate are coground and the ground products are characterized by X‐ray diffraction and infrared spectroscopy. Quantitative evaluation of the remaining soluble part of the prepared amorphous phase at a low percentage around 10% demonstrates a potential use of the ground samples as slow‐release fertilizers.

Synthesis and surfactant modification of clinoptilolite and montmorillonite for the removal of nitrate and preparation of slow release nitrogen fertilizer

“…An effective way to mitigate the aforementioned problem is to develop such type of fertilizers (called as slow release fertilizers (SRFs)) which can release nutrients slowly than commonly used fertilizers. SRFs have many advantages over commonly used fertilizers such as a decreasing fertilizer loss rate, sustainable nutrient supply, lowering application frequency and minimizing potential negative effects associated with over dosages [4][5][6][7][8][9]. Currently, several types of SRFs have been developed and tested [10][11][12][13][14][15][16][17][18].…”

Evaluation of almond young trees growth and nutritional status under different slow-release compound fertilizer types and doses at Nubaria region

“…Our results seem to support the recent view that slowrelease fertilizer substances are only slightly soluble and require additional time for mineralization, thereby giving them slow-release properties. According to Borges et al (2015), slow-release fertilizer materials may be organic or inorganic; a primary example of an organic slowrelease fertilizers is compost while inorganic examples include urea-based fertilizers (such as urea formaldehyde, isobutylidenediurea, and triazone), magnesium ammonium phosphates and other materials which degrade biologically and are not easily soluble (Tong et al, 2009;Qiwu, 2009). In addition to the efficiency of fertilizers dissolution is very important in the plants' adsorption of fertilizers; the current technology to produce slow-release fertilizers is mainly polymer film coating of a fertilizer grain (Liang and Liu, 2006;Wu and Liu, 2008;Calabria et al, 2012); this coating changes the nutrient solubility characteristics and lengthens and controls nutrient release consequently improving fertilizer use efficiency and minimizing pollution to the environment due to fertilizers losses (AlShamaileh et al, 2018).…”

Mechanochemical Synthesis of Slow-release Fertilizers: A Review

“…The current technology to produce SRF is mainly polymer film coating of a fertilizer grain [79]. Coated slow-release fertilizers (CRF) are a new kind of fertilizers that provide nutrient release in balance with crop needs .CRF includes inorganic materials and/or organic polymers and is slightly water soluble, with the granular fertilizers at its core [80]. This coating changes the nutrient solubility characteristics and lengthens and controls nutrient release.…”

“…Studies on CRF have provided new ideas for improving fertilizers use efficiency and minimizing pollution to the environment due to fertilizers losses. Scientific basis has been provided for the research and application of environment friendly, cheap, and new coated slow-release fertilizers [80]. The use of C/SRFs in crop production has demonstrated much success.…”