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.

The Effect of pH in the Tap Water on Nutrient Release from Slow Release Fertilizers

2014 ◽  
Vol 931-932 ◽  
pp. 754-757
Author(s):  
Jittrera Buates ◽  
Petchporn Chawakitchareon ◽  
Rewadee Anuwattana
Keyword(s):  
Slow Release ◽  
Tap Water ◽  
Nutrient Release ◽  
Release Behavior ◽  
Release Formulation ◽  
Total N ◽  
Nutrient Contents ◽  
Scientific Methods ◽  
N Release ◽  
Slow Release Fertilizers

The objective of this research is to study the nutrient release behaviors on slow release fertilizer (Osmocote® N13:P13:K13, 3 month release formulation). The fertilizer was added into distilled water which adjusted pH of 6.5 and 7.5. The nutrient release behaviors were determined by collecting samples every 1 week and analyzed the nutrient contents in samples by scientific methods. As the result, for the total N release behavior, it may be considered that at lower pH condition tended to release more than that at higher one, for the P (shown by P2O5) and K (shown by K2O) release behaviors may be high at high pH condition.

Facile Fabrication of N-Slow Release Fertilizer Hydrogel Beads by Alginate-Based Composites

2021 ◽  
Vol 889 ◽  
pp. 91-97
Author(s):  
Suntree Sangjan ◽  
Wadchara Thongsamer
Keyword(s):  
Sodium Alginate ◽  
Slow Release ◽  
N Fertilizer ◽  
Order Kinetic ◽  
Release Behavior ◽  
Hydrogel Beads ◽  
Hydrogel Composite ◽  
Slow Release Fertilizer ◽  
Order Kinetic Model ◽  
Fertilizer Release

A novel slow-release N-fertilizer hydrogel beads were developed using sodium alginate (SA) and alginate-talcum (ST) composite as N-absorbent. In this work, the hydrogel composite were fabricated by simple method and low cost. N-fertilizer hydrogel beads were prepared two types, for SA types, which were different sodium alginate (1(SA1), 3(SA3), 5(SA5), 7(SA7), and 10(SA10) wt%). And, for ST types, sodium alginate and talcum were vary ratios to 1:0.5(S1T0.5), 1:1(S1T1), and 1:2 (S1T2). The chemical structure of hydrogel composite beads were characterized via Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The release behavior were investigate by Zero-order kinetic model, First-order kinetic model, Higuchi model and Korsmeyer-Peppas model. We have found that the N-fertilizer release constants in Korsmeyer-Peppas model were decrease with increase SA content for 1-5 wt% in SA hydrogel beads. However, SA contents were more than 5 wt% which rapidly enhanced fertilizer release. In addition, to add talcum in ST hydrogel beads significantly reduced fertilizer release rate. The N-fertilizer hydrogel beads exhibits significantly slow release behavior. These results indicates that the development of slow-release fertilizer hydrogel beads can be improve the effectiveness of N-fertilizer.

Application of Slow-Release Fertilizer with the Function of Water-Absorption and Water-Retention in Position Engineering Camouflage

2011 ◽  
Vol 117-119 ◽  
pp. 1100-1102
Author(s):  
Shao Hong Li ◽  
Yue Guo Shen ◽  
Zhong Feng Shi
Keyword(s):  
Water Absorption ◽  
Water Retention ◽  
Slow Release ◽  
Rock Slopes ◽  
Slow Release Fertilizer ◽  
The Earth ◽  
Earth Slopes

The construction of position engineering causes a lot of naked earth slopes and rock slopes. Because the earth and rock lack of water absorption and water retention, traditional vegetation camouflage can not make it. The slow-release fertilizer with the function of water-absorption and water-retention make up it and which will be applied widely in vegetation camouflage of position engineering.

Effects of temperature on nutrient release from slow-release fertilizers

1996 ◽  
Vol 46 (3) ◽  
pp. 179-187 ◽  
Author(s):  
M. E. Engelsjord ◽  
O. Fostad ◽  
B. R. Singh
Keyword(s):  
Slow Release ◽  
Nutrient Release ◽  
Slow Release Fertilizers ◽  
Effects Of Temperature

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 INCORPORATED SLOW-RELEASE FERTILIZER FOR CONTAINER-GROWN NURSERY STOCK

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 632f-632
Author(s):  
Bert T. Swanson ◽  
James B. Calkins ◽  
Daniel G. Krueger ◽  
Theresa L. Stockdale
Keyword(s):  
Slow Release ◽  
Production Systems ◽  
Nutrient Release ◽  
Critical Factor ◽  
Fertility Treatment ◽  
Plant Materials ◽  
Fertility Treatments ◽  
Nursery Stock ◽  
Slow Release Fertilizers ◽  
Successful Production

Media fertility is a critical factor in the successful production of container grown plants. Fertility treatments including fertigation and slow-release fertilizers (topdressed and incorporated) were compared. Fertility treatments were studied over a two-year period on a variety of deciduous and evergreen plant materials. Plant growth was quantified based on height, volume, branching, and quality. Soil fertility levels based on leachates were followed during the study. Nutrient release for incorporated fertilizers tested was variable although less so than when the same fertilizers were topdressed. Fertility treatment effects were species-dependent. Several incorporated, slow-release fertilizers, especially those high in nitrogen (Sierra 17-6-10, Sierra High N 24-4-6, Woodace Briquettes 23-2-0, Woodace 21-4-10), show promise for use in two-year container production systems.

scholarly journals Slow-release Fertilizer Source and Rate Affects Fall Garden Mum Vegetative Growth

HortScience ◽  
1998 ◽  
Vol 33 (4) ◽  
pp. 593e-593
Author(s):  
Edward Bush ◽  
Jeff Kuehny ◽  
Patricia Branch
Keyword(s):  
Vegetative Growth ◽  
Slow Release ◽  
Dry Weight ◽  
Pine Bark ◽  
High Rate ◽  
Slow Release Fertilizer ◽  
Slow Release Fertilizers ◽  
Fertilizer Rates

Three slow-release fertilizer formulations (Osmocote 14–14–14, 18–6–12, and Nutricote 17–6–10) at three rates (1, 2, and 3 lb/yd3) were incorporated into 4 pine bark: 1 sand (by volume) media filling 1-gal nursery containers. Additional treatments included slow-release fertilizer formulations at 1 lb/yd3 fertigated with 100 ppm N 20–10–20 fertilizer. As fertilizer rates increased, vegetative height, width, and dry-weight accumulation generally increased for both pinched and no-pinch mum crops. Fertigated pinch and no-pinch mums were the largest plants with the greatest dry-weight accumulation for each fertilizer formulation. The high rate for all slow-release fertilizers produced the greatest vegetative growth for nonfertigated treatments. This research suggest that higher rates for incorporated slow-release fertilizers and/or fertigation are required to produce maximum vegetative growth.

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