2009
DOI: 10.1021/ie900254b
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Preparation and Properties of Novel Slow-Release NPK Agrochemical Formulations Based on Poly(acrylic acid) Hydrogels and Liquid Fertilizers

Abstract: New slow-release agrochemical formulations based on cross-linked poly(acrylic acid) hydrogels and liquid fertilizers (LF) were prepared by free radical copolymerization of acrylic acid (AA) and N,N′-methylenebisacrylamide directly in the LF solution. Two NPK liquid fertilizer compositions containing urea and potassium and ammonium phosphates were employed. For comparison, AA was also polymerized under identical conditions in distilled water. The resulting products were characterized by FTIR spectroscopy and sc… Show more

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Cited by 138 publications
(62 citation statements)
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“…Due to much economic and environmental concern, the agricultural sectors have been asking for more research on optimizing the use of fertilisers while achieving considerable increases in yield Teodorescu et al 2009;Ni et al 2010;Jin et al 2011). Depending on the soil condition and method of application, the wastage of conventional fertilizers with regard to plant nutrient uptake may reach up to 50% (Vassilev and Vassileva 2003;Entry and Sojka 2008).…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Due to much economic and environmental concern, the agricultural sectors have been asking for more research on optimizing the use of fertilisers while achieving considerable increases in yield Teodorescu et al 2009;Ni et al 2010;Jin et al 2011). Depending on the soil condition and method of application, the wastage of conventional fertilizers with regard to plant nutrient uptake may reach up to 50% (Vassilev and Vassileva 2003;Entry and Sojka 2008).…”
Section: Introductionmentioning
confidence: 99%
“…Common CRF normally only provides nitrogen, while BpF provides extra micro and macronutrients due to compared traditional water-soluble fertilisers. Various techniques of controlled-release fertiliser applications have been introduced to enhance the fertiliser efficiency and reduce the concerns and frequency of their applications Teodorescu et al 2009;Ni et al 2010;Jin et al 2011). Two approaches seem to have proven most effective.…”
Section: Introductionmentioning
confidence: 99%
“…Among these slow-release fertilizers (SRF), the major categories are fertilizers coated with different materials. Recently, a number of materials have been tested: biodegradable polymers (Wu and Liu, 2008;Ao et al, 2013;Jia et al, 2013;Lubkowski et al, 2015), superabsorbent polymers (Liang et al, 2007;Teodorescu et al, 2009), commercial polymers (Figueiredo et al, 2012;Silva et al, 2012;Ma et al, 2013), oxides (Zhang et al, 2014) and fly ash (Dong et al, 2016). More specifically for MAP, a previous study has shown that when P is more slowly released from a thin polymer coated-MAP fertilizer granule, it increased P availability, P uptake and P use efficiency by barley plants (Pauly et al, 2002).…”
Section: Introductionmentioning
confidence: 99%
“…Mixing SAPs with soils has been found to (i) decrease soil bulk density (similar to organic matter function) and penetration resistance, (ii) increase soil aggregation, porosity, aeration and water retention capacity (Huttermann et al, 1999;Akhter et al, 2004;Busscher et al, 2009;Bai et al, 2010;Han et al, 2010), (iii) decrease soil saturated hydraulic conductivity and drainage (Abedi- Koupai et al, 2008;Andry et al, 2009;Bhardwaj et al, 2007), and (iv) serve as a source of slow release of nutri-ents, and reduce plant sensitivity to soil salinity (Liu et al, 2006;Teodorescu et al, 2009;Dorraji et al, 2010;Qu and Varennes, 2009). The application of SAP increased soil water content at field capacity and at permanent wilting point, which may lead to a considerable increase in available water content in soils of different texture used under various crops' management (Karimi et al, 2009;Agaba et al, 2010;Shahid et al, 2012;Banedjschafie and Durner, 2015;Montesano et al, 2015).…”
mentioning
confidence: 99%