scholarly journals Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating

2016 ◽  
Vol 20 (1) ◽  
pp. 37 ◽  
Author(s):  
Lili Handayani ◽  
Gunawan Djajakirana ◽  
. Darmawan ◽  
Canecio Peralta Munoz
Keyword(s):  
Citric Acid ◽  
Slow Release ◽  
Nutrient Release ◽  
Fertilizer Application ◽  
Coating Material ◽  
Distilled Water ◽  
Chitosan Coating ◽  
Slow Release Fertilizer ◽  
Low Efficiency ◽  
Nutrient Solubility

The low-efficiency problem in fertilizer application can be overcome by controlling fertilizer solubility, i.e. by rendering the fertilizer to be released gradually; such material is also known as slow-release fertilizer (SRF). This research was aimed to formulate SRF by coating technique using acrylic and chitosan as the coating material, and to evaluate fertilizer resistance to too fast disintegration, and rate of nutrient release method. The results demonstrated that fertilizer formulation containing  N, P, K, Fe, Cu, and Zn with granulation technique yielded 74% of granules with 2-5 mm in diameter. The SRFs (formulated fertilizer with acrylic or chitosan coating) were more resistant to water pounding than non-SRF. Furthermore, shaking test with distilled water or 2% citric acid, or by percolation test with distilled water showed that the SRFs had lower nutrient solubility than the non-SRFs. The results of shaking test also specifically indicated that coating with acrylic made the fertilizer more resistant to the citric acid,suggesting that this coating material would be more suitable in acidic soils. The SRFs formulated with the addition of chitosan during blending of micronutrients prior to mixing with macronutrients, granulation, and final coating exhibited lower nutrient solubility than the SRFs without the pre-coating chitosan addition. [How to Cite: Lili H, G Djajakirana, Darmawan, and CP Munoz. 2015. Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating. J Trop Soils 19: 37-45. Doi: 10.5400/jts.2015.20.1.37][Permalink/DOI: www.dx.doi.org/10.5400/jts.2015.20.1.37]

scholarly journals 370 Iron and Iron Compounds Reduce Phosphorus Leaching from Nursery Containers

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 456B-456
Author(s):  
Jeffrey H. Gillman ◽  
Carl J. Rosen
Keyword(s):  
Surface Water ◽  
Metallic Iron ◽  
Iron Ore ◽  
Slow Release ◽  
Phosphorus Leaching ◽  
Distilled Water ◽  
Iron Compounds ◽  
Growing Media ◽  
Slow Release Fertilizer ◽  
Phosphorus Contamination

Phosphorus contamination of surface water is a growing problem associated with container production of nursery plants. Iron and iron compounds have the ability to adsorb phosphorus and render it immobile. Incorporating iron compounds into media at the base of nursery containers serves to filter out phosphorus from fertilizers while still allowing the plant to collect enough phosphorus to grow. Two experiments were devised. The first experiment examined how much phosphorus various iron compounds would adsorb. Metallic iron adsorbed the most phosphorus, followed by HCl reacted magnetite (a form of iron ore), Fe2O3, Fe3O4 and magnetite. In the second experiment, PVC tubes (4 cm inner diam.) were filled to a level of 5 cm with a phosphorus adsorbing layer containing growing media that was 25% or 50% by weight iron compounds. Compounds included metallic iron, HCl reacted magnetite and magnetite. Plain media was used as a control. A layer of 15 cm of media and slow-release fertilizer was applied above the adsorptive layer. One hundred milliliters of distilled water was applied to PVC tubes daily to simulate irrigation. Metallic iron reduced phosphorus leachate to almost 0 for over 2 weeks. HCl reacted magnetite was also effective in reducing phosphorus leachate. Magnetite only affected phosphorus leachate slightly.

Utilization of Chitosan as Coating Material in Making NPK Slow Release Fertilizer

2020 ◽  
Vol 391 (1) ◽  
pp. 1900188 ◽  
Author(s):  
Muhammad D. Gumelar ◽  
Moh. Hamzah ◽  
Ade S. Hidayat ◽  
Dita A. Saputra ◽  
Idvan
Keyword(s):  
Slow Release ◽  
Coating Material ◽  
Slow Release Fertilizer

Preparation and Properties of the Slow-Release Fertilizer with Green Coat

2012 ◽  
Vol 518-523 ◽  
pp. 4745-4748
Author(s):  
Qing Wang ◽  
Sha Chen ◽  
Pei Guang Zhao ◽  
Yu Cao ◽  
Long Fei Zhu ◽  
...  
Keyword(s):  
Water Retention ◽  
Slow Release ◽  
Nutrient Release ◽  
Release Behavior ◽  
Digestion Method ◽  
Slow Release Fertilizer ◽  
Environmental Friendly ◽  
Influence Of Water ◽  
Slow Release Fertilizers ◽  
Kjeldahl Digestion

A kind of double-coated environmental friendly fertilizer was prepared by urea as a core, well-mixed keratin and oxidation starch as an inner coating, and superabsorbent polymer as the outer coating. The influence of water absorbency, water retention, and the slow-release behavior of the study fertilizer were investigated. 0.01M CaCl2 immersion extraction and Kjeldahl digestion method were used to measure the content of nitrogen. And the result showed that the nutrient release was 72wt% on the thirtieth day. This result corresponded with the standard of slow release fertilizers of the Committee of European Normalization (CEN) [1]. Keratin and oxidation starch were biodegradable polymer and nontoxic. Both the properties of the materials and the result of the slow-release behavior suggested a new kind of excellent, environmental friendly, slow-release fertilizer.

scholarly journals 127 Growth of Impatiens `Accent Orange' in Substrates Containing Compost with Four Slow-release Fertilizer Concentrations

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 463D-463
Author(s):  
Kimberly Klock-Moore
Keyword(s):  
Slow Release ◽  
Dry Mass ◽  
Fertilizer Application ◽  
Application Rate ◽  
Slow Release Fertilizer ◽  
Application Rates ◽  
Fertilizer Application Rate ◽  
Fertilizer Rates ◽  
Pot Plants

The objective of this experiment was to compare the growth of impatiens `Accent Orange' in substrates containing compost made from biosolids and yard trimmings with four slow-release fertilizer application rates. Plugs of impatiens were transplanted into 400-ml pots filled with 100% compost as a stand-alone substrate or with 60%, 30%, or 0% compost combined with control substrate components. Six days after transplanting, all plants were top-dressed with 0.5, 1, 2, or 4 g of Nutricote 13N-5.7P-10.8K (type 180) per pot. Shoot dry mass increased as the percentage of compost in the substrate increased from 0% to 100%. Shoot dry mass also increased as the fertilizer application rate increased from 0.5 to 4 g per pot. Plants grown in 30% and 60% compost with 0.5 g of fertilizer were similar in size to plants grown in 0% compost with 4 g of fertilizer per pot. Plants grown in 100% compost at all of the fertilizer rates were larger than all other plants in this study.

Water Absorbency Properties of OPEFB Filled Hydrogels Composites

2014 ◽  
Vol 980 ◽  
pp. 18-22
Author(s):  
Nurul Ekmi Rabat ◽  
Shahrir Hashim ◽  
Rohah A. Majid
Keyword(s):  
Electron Microscopy ◽  
Slow Release ◽  
Fertilizer Application ◽  
Water Absorbency ◽  
Empty Fruit Bunch ◽  
Drying Process ◽  
Hydrogel Composite ◽  
Slow Release Fertilizer ◽  
Hydrogel Composites ◽  
Scanning Electron

For slow release fertilizer application, oil palm empty fruit bunch-grafted-poly (acrylic acid-co-acrylamide) [OPEFB-g-P(AA-co-AAm)] hydrogel composites were synthesized via two techniques; Two Steps (T1) and in-situ (T2). Scanning electron microscopy of hydrogel composite T1 has higher surface area and holes while hydrogel T2 displays smoother and tighter surface. Water absorbency capacity of hydrogel T1 is 42.90 gram/gram (g/g) and hydrogel T2 is 39.96 g/g. WAC of hydrogel T2 has much better re-swelling ability compared to T1 after it went through five cycles of drying-swelling-drying process. Hence, T2 has produced a hydrogel composite that is reusable with great morphology properties.

Nutrients in Salmonid Ecosystems: Sustaining Production and Biodiversity

2003 ◽  
Keyword(s):  
Pacific Northwest ◽  
Vegetable Oil ◽  
Field Experiments ◽  
Slow Release ◽  
Ammonium Phosphate ◽  
Nutrient Release ◽  
Hydrated Lime ◽  
Dissolution Rates ◽  
Slow Release Fertilizer ◽  
Magnesium Ammonium

<em>Abstract.</em>—A solid briquette fertilizer for use in the Pacific Northwest streams and elsewhere was identified from a variety of slow-release formulations (26 were tested with varying N:P<sub>2</sub>O<sub>5</sub>:K<sub>2</sub>O ratios and binders) using indoor trough and controlled field experiments. The use of a slow-release fertilizer is an innovative method for adding inorganic nutrients to nutrientpoor (oligotrophic) streams to increase autotrophic production and aid in the restoration of salmonid populations. A series of indoor trough experiments demonstrated that the majority of samples containing binders of molasses, hydrated lime, vegetable oil, bentonite, starch, acrawax, candle wax, and Daratak® XB-3631 (unpolymerized Saran™) dissolved too slowly. The fastest dissolution rates occurred with fertilizer briquettes having no binder or vegetable oil. Further trough and field studies using fertilizer with no binder and vegetable oil as binder examined the effects of varying N:P<sub>2</sub>O<sub>5</sub>:K<sub>2</sub>O ratios. Dissolution rates were varied by using different percentages of magnesium ammonium phosphate (MagAmP; its formula 7:40:0 N:P<sub>2</sub>O<sub>5</sub>:K<sub>2</sub>O) and urea (46:0:0). Optimal continual nutrient release for a period of four months was achieved with a fertilizer formulation of 17:30:0 (percent by weight N:P<sub>2</sub>O<sub>5</sub>:K<sub>2</sub>O), with a ratio of 75% MagAmP to 25% urea, and containing no binder. The dissolution rate for this product ranged from 4.6% to 6.6% per week (for field and trough experiments, respectively) in water of 0.15 m/s average velocity. These studies indicate that a slow-release fertilizer product can be manufactured to last approximately four months when applied in the spring to stimulate autotrophic production in nutrient deficient streams, thereby increasing forage and salmonid production.

Chitosan-smectite composite on the urea adsorption–desorption study for slow-release fertilizer application

2018 ◽  
Vol 15 (2) ◽  
pp. 292-297
Author(s):  
Is Fatimah ◽  
Dwiarso Rubiyanto ◽  
Septian Perwira Yudha ◽  
Gunarti Pratiwi ◽  
Ayu Puspita
Keyword(s):  
Clay Minerals ◽  
Slow Release ◽  
Water Solution ◽  
Physicochemical Characterization ◽  
Fertilizer Application ◽  
Chromatography Method ◽  
Content Type ◽  
Slow Release Fertilizer ◽  
Desorption Study ◽  
Adsorption Desorption

Purpose The purpose of this study is to prepare composite of chitosan-modified smectite clays consisting of montmorillonite and saponite clay minerals and their urea adsorption–desorption study. Prepared materials were designed for slow-release fertilizer application. Design/methodology/approach Preparation of the composites was conducted by a simple intercalation of chitosan solution and clay suspension followed by hydrogel beads formation. Physicochemical characterization of materials was performed by X-ray diffraction, gas sorption analysis by using Brunauer–Emmett–Teller surface areas and pore volume, water absorbency and Fourier transform-infrared. Urea adsorption and desorption studies of prepared materials were conducted by using batch method, and the adsorbed and desorbed urea content was analyzed by using high-performance liquid chromatography method. Findings The results revealed that the composites have higher absorptivity and lower absorptivity toward urea from and into water solution compared to raw clay minerals. Adsorption capacity and slow desorption rate of urea from the composites suggested the potential application of the composites as slow urea-releasing agent. Originality/value There are many papers that study the formation of chitosan-clay composites, but the study on the urea adsorption–desorption properties based on chitosan-smectite minerals have not been reported. Intensive study related to physicochemical properties and its related kinetics study is an important basic finding for further applications.

Slow Release Fertilizer Prepared from Leonardite and Zeolite

2014 ◽  
Vol 931-932 ◽  
pp. 758-761
Author(s):  
Petchporn Chawakitchareon ◽  
Parkwan Poovuttikul ◽  
Thanyanuch Chantanurak
Keyword(s):  
Potassium Chloride ◽  
Slow Release ◽  
Ammonium Phosphate ◽  
Distilled Water ◽  
Commercial Fertilizer ◽  
Slow Release Fertilizer ◽  
Standard Methodology ◽  
Test Kit ◽  
Slow Release Fertilizers

This research aims to develop slow release fertilizers by using Leonardite and Zeolite. Two formulations of slow release fertilizer were prepared namely the Leonardite and Zeolite slow release fertilizer and the Leonardite slow release fertilizer. Theirnutrient releasing rates were investigated and comparedwith that of the commercially availableslow release fertilizer which contained N8:P24:K24.Specifically the slow release fertilizers were formulated from leonardite, zeolite and other fertilizer materials such as ammonium phosphate and potassium chloride. Each formulation was then pelletized and baked at 100°C for 1 hr to remove water; then they were kilned at 150°C for 1 hr. All the kilned fertilizers were analyzed subsequently by using the Fertilizer Test Kit (KU.5) to determine the releasing rates of the main N, P and K nutrients. Each fertilizer was immersed in distilled water and shakenat the speed of 150 rpm for 10 min, 30 min, 1 hr and 2 hr. The nutrients released into the distilled water were determined following the standard methodology. The results indicated that the nutrient releasing rates of the slow release fertilizer prepared from Leonardite and Zeolite were less than those observed in the commercial fertilizer.

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