scholarly journals Nutrient Release Performance of Starch Coated NPK Fertilizers and Their Effects on Corn Growth

2018 ◽  
Vol 15 (2) ◽  
pp. 104 ◽  
Author(s):  
Nur Izza Faiqotul Himmah ◽  
Gunawan Djajakirana ◽  
Darmawan Darmawan
Keyword(s):  
Release Rate ◽  
Slow Release ◽  
Slow Growth ◽  
Nutrient Release ◽  
Environmental Issues ◽  
Coating Materials ◽  
Npk Fertilizers ◽  
Glutinous Rice ◽  
Npk Fertilizer ◽  
Coated Fertilizers

<p>One way to control or slow down the nutrient release rate from fertilizer is by coating technique.  Nowadays the use of biodegradable coating materials for slow-release fertilizer (SRF) is preferable because of environmental issues.  This research was aimed to make SRF using starches and cellulose as the coating materials and to test the release rate of the nutrients.  Five kinds of starches (cassava, corn, sago, wheat, and glutinous rice) and carboxymethyl cellulose (CMC) were used as coating material for granulated NPK fertilizer.  The coated fertilizers (NPK SRF) were tested for their leaching rate in the soil by percolation experiment.  The results showed that the kind of starch used influenced the release rate of the NPK SRFs. The NPK SRF coated with sago starch exhibited slow release rate and low leached nutrients which also resulted in slow growth of corn plant, as expected of SRF.  The use of starch and CMC as biodegradable coating materials in this research has a possibility to affect the microbial activity in the soil so that the nutrient release became faster than the uncoated NPK fertilizer.</p>

scholarly journals Development of Carbon Based NPK Slow Release Fertilizer using Biochar from Oil Palm Empty Fruits Bunch

2020 ◽  
Vol 3 (1) ◽  
pp. 19-24
Author(s):  
Era Restu Finalis ◽  
Sumbogo Murti Sri Djangkung ◽  
Arfiana ◽  
Ilhamsyah Noor ◽  
Hadi Suratno ◽  
...  
Keyword(s):  
Oil Palm ◽  
Slow Release ◽  
Solid Material ◽  
Biomass Gasification ◽  
Thermochemical Conversion ◽  
Onion Plant ◽  
Npk Fertilizers ◽  
Empty Fruit Bunches ◽  
Slow Release Fertilizer ◽  
Npk Fertilizer

Biochar is a solid material produced by thermochemical conversion of biomass under oxygen-limited conditions. It has a wide surface and contains many pores so that it can be used as a material for making fertilizer. Biochar based slow release NPK fertilizer was formulated and developed to reduce nutrient leaching and greenhouse gas emissions. In this research, biochar which was a by-product of biomass gasification using oil palm empty fruit bunches was processed to make slow release biochar NPK fertilizer. Sources of nitrogen (N) were derived from urea, phosphate (P) from diamonium phosphate (DAP) and potassium (K) derived from potassium chloride (KCl). Zeolite was added as a matrix to improve fertilizer characteristics. All materials were formulated to make slow release biochar NPK fertilizer used for red onion (Allium sepa) plant applications. Several micronutrients were also added including Mg (MgSO4 fertilizer) and S (ZA fertilizer) to support plant growth. The characterization of fertilizer products was carried out by using SEM, BET etc. to determine physical properties including surface area, pore volume, morphology and composition. Furthermore, biochar NPK fertilizer was applied to the red onion plant which was a high-value crop in Indonesia. The application of NPK biochar fertilizer on red onion plant showed its superiority compared to commercial NPK fertilizers. In addition, the use of Magnesium and sulfur micronutrients could support the growth of red onion bulbs so that they produced more and bigger bulbs.Keywords: biomass, gasification, oil palm empty fruit bunches, biochar, slow release fertilizer*The paper has been selected from a collaboration with IPST and 7th ICFCHT 2019 for a conference entitled "Innovation in Polymer Science and Technology (IPST) 2019 in Conjunction with 7th International Conference on Fuel Cell and Hydrogen Technology (ICFCHT 2019) on October 16th - 19th at The Stones Hotel Legian, Bali, Indonesia"

scholarly journals Nutrient Release and Ammonia Volatilization from Biochar-Blended Fertilizer with and without Densification

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2082
Author(s):  
Yit Leng Lee ◽  
Osumanu Haruna Ahmed ◽  
Samsuri Abdul Wahid ◽  
Mohamadu Boyie Jalloh ◽  
Adiza Alhassan Muzah
Keyword(s):  
Functional Groups ◽  
Ammonia Volatilization ◽  
Slow Release ◽  
Flow System ◽  
Acid Soil ◽  
Nutrient Release ◽  
Nutrient Loss ◽  
Crop Cultivation ◽  
Slow Release Fertilizer ◽  
Npk Fertilizer

Blending fertilizer with biochar followed by densification to make it into a tablet can enhance the adsorption of fertilizer on the biochar surface and reduce the nutrient loss during handling. However, the nutrient release and ammonia volatilization from biochar-blended fertilizer with and without densification are not well understood. The objectives of this study were to determine the nutrient release and ammonia volatilization from an acid soil applied with biochar-blended NPK fertilizer with and without densification. The nutrient release of biochar-blended NPK was determined using water incubation for 30 days, whereas daily loss of ammonia was measured using a closed dynamic air flow system for 10 days. The densified biochar-blended NPK caused stronger physical binding of the nutrients within the tablet in addition to stronger chemical bondings between the nutrients with the biochar’s functional groups. As a result, nutrient release in the water incubation from the biochar-blended NPK fertilizer tablet was slower. However, blending the biochar with the NPK fertilizer increased soil ammonia volatilization relative to the NPK fertilizer alone. This demonstrates that the biochar-blended fertilizer tablet has the potential to serve as a slow release fertilizer for crop cultivation.

scholarly journals Nitrogen, phosphorus, potassium, calcium and magnesium release from two compressed fertilizers: column experiments

2014 ◽  
Vol 6 (2) ◽  
pp. 1555-1578
Author(s):  
M. J. Fernández-Sanjurjo ◽  
E. Alvarez-Rodríguez ◽  
A. Núñez-Delgado ◽  
M. L. Fernández-Marcos ◽  
A. Romar-Gasalla
Keyword(s):  
Slow Release ◽  
Nutrient Release ◽  
Geographic Area ◽  
Nutrient Concentrations ◽  
Chemical Parameters ◽  
Soil Columns ◽  
Npk Fertilizers ◽  
Soil Material ◽  
Nutrient Demand ◽  
Nitrogen Phosphorus

Abstract. We used soil columns to study nutrients release from two compressed NPK fertilizers. The columns were filled with soil material from the surface horizon of a granitic soil. Tablets of two slow-release NPK fertilizers (11-18-11 or 8-8-16) were placed into the soil, and then water was percolated through the columns in a saturated regime. Percolates were analyzed for N, P, K, Ca and Mg. These nutrients were also determined in soil and fertilizer tablets at the end of the trials. Nutrient concentrations were high in the first percolates, reaching a steady state when 1426 mm water have percolated, which is equivalent to approximately 1.5 years of rainfall in the geographic area. In the whole trial, both tablets lost more than 80% of their initial N, P and K contents. However, K, Ca and Mg were the most leached, whereas N and P were lost in leachates to a lesser extent. Nutrient release was slower from the tablet with composition 8-8-16 than from the 11-18-11 fertilizer. In view of that, the 8-8-16 tablet can be considered more adequate for crops with a nutrient demand sustained over time. At the end of the trial, the effects of these fertilizers on soil chemical parameters were still evident.

scholarly journals Pineapple Residue Ash Reduces Carbon Dioxide and Nitrous Oxide Emissions in Pineapple Cultivation on Tropical Peat Soils at Saratok, Malaysia

2021 ◽  
Vol 13 (3) ◽  
pp. 1014
Author(s):  
Liza Nuriati Lim Kim Choo ◽  
Osumanu Haruna Ahmed ◽  
Nik Muhamad Nik Majid ◽  
Zakry Fitri Abd Aziz
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Peat Soil ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Peat Soils ◽  
Closed Chamber ◽  
Npk Fertilizers ◽  
Npk Fertilizer ◽  
Carbon Dioxide Co2

Burning pineapple residues on peat soils before pineapple replanting raises concerns on hazards of peat fires. A study was conducted to determine whether ash produced from pineapple residues could be used to minimize carbon dioxide (CO2) and nitrous oxide (N2O) emissions in cultivated tropical peatlands. The effects of pineapple residue ash fertilization on CO2 and N2O emissions from a peat soil grown with pineapple were determined using closed chamber method with the following treatments: (i) 25, 50, 70, and 100% of the suggested rate of pineapple residue ash + NPK fertilizer, (ii) NPK fertilizer, and (iii) peat soil only. Soils treated with pineapple residue ash (25%) decreased CO2 and N2O emissions relative to soils without ash due to adsorption of organic compounds, ammonium, and nitrate ions onto the charged surface of ash through hydrogen bonding. The ability of the ash to maintain higher soil pH during pineapple growth primarily contributed to low CO2 and N2O emissions. Co-application of pineapple residue ash and compound NPK fertilizer also improves soil ammonium and nitrate availability, and fruit quality of pineapples. Compound NPK fertilizers can be amended with pineapple residue ash to minimize CO2 and N2O emissions without reducing peat soil and pineapple productivity.

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