Preparation and properties of a double-coated slow-release NPK compound fertilizer with superabsorbent and water-retention

Wu, Lan; Liu, Mingzhu; Liang, Rui

doi:10.1016/j.biortech.2006.12.027

Cited by 284 publications

(161 citation statements)

References 20 publications

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“…[17] Furthermore, chitosancoated NPK compound fertilizers have demonstrated controlled release properties. [18] In this work, intercalated urea-kaolinite mixture was used as the fertilizer base and chitosan was used as the binder to prepare CRF. Nitrogen release properties of the CRF were then investigated.…”

Section: Introductionmentioning

confidence: 99%

“…[19,20] The process used for coating the granules was generally complicated and cannot be assumed as a cost-effective process. [18] Additionally, there are no attempts to explore the effect of different chitosan concentration on controlled release properties of nitrogen fertilizers. In this study, urea-intercalated kaolinite, which contains the highest urea concentration (20%) was mixed with different concentrations of chitosan as the binder and then was granulated to prepare nitrogen-based CRF.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of nitrogen release properties of urea–kaolinite fertilizer with chitosan binder

Roshanravan

Soltani

Rashid

et al. 2015

Chemical Speciation & Bioavailability

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The use of controlled release fertilizer (CRF) has become a new trend to minimize environmental pollution. In this study, urea-kaolinite containing 20 wt% urea after one hour dry grinding was mixed with different concentrations of chitosan as a binder to prepare nitrogen-based CRF. Fourier transform infrared spectroscopy confirmed the hydrogen bonding between urea and kaolinite. Covalent interaction between urea-kaolinite and chitosan make the granules stronger. The nitrogen release was measured in 5 days interval using a diacetylmonoxime calorimetric method at a wavelength of 527 nm. The results illustrated that by increasing the chitosan concentration from 3 to 7.5%, nitrogen release decreased from 41.23 to 25.25% after one day and from 77.31 to 59.27% after 30 days incubation in water. Compressive stress at break tests confirmed that granules with chitosan 6% had the highest resistance and were chosen for ammonia volatilization tests. Ammonia volatilization was carried out using the forced-draft technique for a period of 10 weeks. The results showed that the total amount of ammonia loss for conventional urea fertilizer and urea-kaolinite-chitosan granules was 68.63 and 56.75%, respectively. This controlled release product could be applied in agricultural crop production purpose due to its controlled solubility in the soil, high nutrient use efficiency and potential economic benefits.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of nitrogen release properties of urea–kaolinite fertilizer with chitosan binder

Roshanravan

Soltani

Rashid

et al. 2015

Chemical Speciation & Bioavailability

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“…% of CRWR fertilizer coated with carbonaceous-SAPs in two different soils on water retention properties were observed and summarized in Table II. The obtained result in Table II shows that CRWR coated with carbonaceous-SAPs has capability to absorb and stored water before slowly released the nutrients with soil moisture [6]. By comparing the results in Table II, it can also be seen that the water retention of CRWR coated with carbonaceous-SAPs in top soil decreased faster than the organic soil.…”

Section: Water Retention Properties Of Crwr In Soilmentioning

confidence: 82%

“…One of the solutions to this problem is by applying controlled release fertilizer. The use of slow release fertilizer is considered as a new trend to save fertilizer consumption and to minimize environmental pollution [6]. Practically, there are a few factors that controlled the release of the fertilizers include the soil's temperature, microbial activity, soil moisture, pH and organic matter.…”

Section: Introductionmentioning

confidence: 99%

Properties of Controlled-Release-Water-Retention Fertilizer Coated with Carbonaceous-g-Poly(acrylic acid-co-acrylamide)Superabsorbent Polymer

Ghazali¹,

Jamar²,

Noordin³

et al. 2017

IJCEA

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Abstract-Fertilizer and water are very important in determining the production of agriculture nowadays. Apart of that, the excessive use of fertilizer in plantation somehow could leads to environmental pollution. The present study reported a preparation of controlled release water retention (CRWR) fertilizer coated with superabsorbent polymer (SAPs). The purpose of coating the fertilizer using SAPs is to enhance the utilization of fertilizer and reduce the environmental pollution. In this study, the synthesis of carbonaceous-SAPs was carried out via solution polymerization technique by using monomers of poly(acrylic acid) (AA) and acrylamide (AM), cross linker of methylene bisacrylamide (MBA) and initiator of ammonium peroxodisulfate (APS) that partially neutralized with sodium hydroxide (NaOH). The fertilizer granule then was coated with carbonaceous-SAPs which later known as CRWR fertilizer. The morphology and the bonding formation of the CRWR fertilizer were investigated by using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectrophotometer (FTIR), respectively. Moreover, the water absorbency and water retention in soil were conducted in order to investigate the efficiency of carbonaceous-SAPs on the properties of CRWR fertilizer. Based on the results, it was found that the CRWR fertilizer coated with carbonaceous-SAPs had higher water absorbency and water retention ability than the CRWR fertilizer without carbonaceous-SAPs. The addition of the carbonaceous filler in the formulation of SAP increase the water uptake compared to unfilled-SAP. Moreover, types of soil also play an important factor in water retention properties. CRWR fertilizer in organic soil results in higher water retention ability compared in top soil.

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“…Slow release fertilizers (SRF) release nutrients slowly and uncontrolled (Wu et al, 2008). The greatest advantage is that the required dose of fertilizer is applied to a reduced numbers of applications compared to other forms of fertilizers (Magni et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

The comparison of organic and inorganic fertilizers influence on selected indicators of turf growth-production process

Hric

Jančovič

Vozár

2016

AAS

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The aim of this experiment was to compare the influence of organic and inorganic fertilizers on selected indicators of turf growth-production process under non-irrigated conditions. The experiment was carried out in warm and dry conditions in the area of Nitra (Slovak Republic). In the experiment were included 5 treatments: 1.Without fertilization, 2. Turf NPK fertilizer 15-3-8 (+3 MgO +0.8 Fe +18 S), 3. Slow release NPK fertilizer 14-5-14 (+4 CaO +4 MgO +7 S), 4. Organic NPK fertilizer 5-1-1 and 5. Organic NPK fertilizer 3-2-1. Determination of the average height of turf, total height of turf and the annual average daily gain of height showed that best treatment was application of slow release fertilizer. Turf fertilized by Organic NPK fertilizer 5-1-1 reached the highest values of the average height of turf, total height of turf and the annual average daily gain of height, the same as treatment without fertilization. These finding were statistically significant. Treatment without fertilization reached the lowest values in evaluated growth-production parameters.Key words: turf, fertilizing, organic fertilizers, inorganic fertilizers, growth-production process IZVLEČEK PRIMERJAVA VPLIVA ORGANSKIH IN MINERALNIH GNOJIL NA IZBRANE KAZALNIKE RASTI IN PRIDELKA TRAVNE RUŠENamen tega poskusa je bil primerjati vpliv gnojenja z organskimi in mineralnimi gnojili na izbrane kazalnike rasti in pridelka travne ruše v razmerah brez namakanja. Poskus je potekal v toplih in sušnih razmerah na območju Nitre (Republika Slovaška). V poskus je bilo vključenih 5 obravnavanj: 1. Brez gnojenja, 2. Gnojenje ruše z NPK gnojili v razmerju 15-3-8 (+3 MgO +0.8 Fe +18 S), 3. Gnojenje z gnojili s počasnim sproščanjem NPK hranil 14-5-14 (+4 CaO +4 MgO +7 S), 4. Gnojenje z organskimi NPK gnojili v razmerju 5-1-1 in 5. Gnojenje z organskimi NPK gnojili v razmerju 3-2-1. Meritve povprečne višine travne ruše, celokupne višine travne ruše in povprečnega letnega dnevnega prirastka v višino so pokazale, da je bilo najboljše obravnavanje gnojenje z gnojili, ki počasi sproščajo hranila. Ruša, ki je bila gnojena z organskimi gnojili v razmerju 5-1-1, je dosegla enake največje vrednosti povprečne višine, celokupne višine in povprečnega letnega dnevnega prirastka v višino kot obravnavanje brez gnojenja. Izsledki so bili statistično značilni. Obravnavanje brez gnojenja je imelo najmanjše vrednosti ovrednotenih rastno-produkcijskih parametrov.

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Preparation and properties of a double-coated slow-release NPK compound fertilizer with superabsorbent and water-retention

Cited by 284 publications

References 20 publications

Enhancement of nitrogen release properties of urea–kaolinite fertilizer with chitosan binder

Enhancement of nitrogen release properties of urea–kaolinite fertilizer with chitosan binder

Properties of Controlled-Release-Water-Retention Fertilizer Coated with Carbonaceous-g-Poly(acrylic acid-co-acrylamide)Superabsorbent Polymer

The comparison of organic and inorganic fertilizers influence on selected indicators of turf growth-production process

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