Reducing nitrogen leaching while enhancing growth, yield performance and physiological traits of rice by the application of controlled-release urea fertilizer

2020 ◽  
Author(s):  
El-Refaie Kenawy ◽  
Ali Hosny ◽  
Khalil Saad-Allah
Keyword(s):  
Controlled Release ◽  
Growth Yield ◽  
Nitrogen Leaching ◽  
Physiological Traits ◽  
Yield Performance ◽  
Urea Fertilizer ◽  
Controlled Release Urea

Optimization of Pan Coating Process for Increased Efficiency of Controlled-Release Urea Fertilizer

2021 ◽  
Vol 57 (4) ◽  
pp. 333-342
Author(s):  
Trung Huu Nguyen ◽  
Tran Nguyen Minh An ◽  
Mahboob Alam ◽  
Duc Hoai Tran ◽  
Nghi Tran ◽  
...  
Keyword(s):  
Controlled Release ◽  
Layer Thickness ◽  
Release Time ◽  
Coating Process ◽  
Analysis Method ◽  
Sauter Mean Diameter ◽  
Urea Fertilizer ◽  
The Relationship ◽  
Central Composite ◽  
Controlled Release Urea

The goal of the research is to develop an experimental mathematical model of pan coating process effect on the biodegradable polymer and to determine optimal process parameters. The polymer solution was conducted with phosphated di-starch phosphate, polyvinyl alcohol, and polyacrylic acid and performed as material coating for the controlled-release urea fertilizer. The image analysis method has been used to determine the particle size distribution, Sauter mean diameter of the particle and layer thickness that is novel. The central composite rotatable design has been selected to determine the regression models of the process, which described the relationship between two objective variables as layer thickness, release time with angle of pan, spray flow, and coating time. The statistical analysis results indicate the fitness of model.

Empirical scale-up model of pan-coating process for controlled-release urea fertilizer production

2020 ◽  
pp. 1-8
Author(s):  
Trung H. Nguyen ◽  
M. N. Tran An ◽  
Mahboob Alam ◽  
Nghi Tran ◽  
Dung V. Trinh
Keyword(s):  
Controlled Release ◽  
Scale Up ◽  
Coating Process ◽  
Urea Fertilizer ◽  
Fertilizer Production ◽  
Controlled Release Urea

Controlled-release urea reduced nitrogen leaching and improved nitrogen use efficiency and yield of direct-seeded rice

2018 ◽  
Vol 220 ◽  
pp. 191-197 ◽  
Author(s):  
Shugang Zhang ◽  
Tianlin Shen ◽  
Yuechao Yang ◽  
Yuncong C. Li ◽  
Yongshan Wan ◽  
...  
Keyword(s):  
Controlled Release ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Leaching ◽  
Nitrogen Use ◽  
Reduced Nitrogen ◽  
Direct Seeded ◽  
Use Efficiency ◽  
Controlled Release Urea

scholarly journals Effects of controlled-release urea application on the growth, yield and nitrogen recovery efficiency of cotton

2013 ◽  
Vol 04 (12) ◽  
pp. 33-38
Author(s):  
Suping Wang ◽  
Xiaokun Li ◽  
Jianwei Lu ◽  
Juan Hong ◽  
Gang Chen ◽  
...  
Keyword(s):  
Controlled Release ◽  
Growth Yield ◽  
Nitrogen Recovery ◽  
Recovery Efficiency ◽  
Nitrogen Recovery Efficiency ◽  
Controlled Release Urea

scholarly journals Synthesis and Characterization of Controlled-Release Urea Fertilizer from Superabsorbent Hydrogels

2020 ◽  
Vol 20 (3) ◽  
pp. 616
Author(s):  
Salih Muharam ◽  
Afria Fitri ◽  
Lela Mukmilah Yuningsih ◽  
Yulia Mariana Tessa Ayudia Putri ◽  
Isnaini Rahmawati
Keyword(s):  
Controlled Release ◽  
Ph Control ◽  
Superabsorbent Hydrogel ◽  
Urea Fertilizer ◽  
Urea Release ◽  
Controlled Release Urea ◽  
Carboxy Methyl ◽  
Controlled Release Fertilizers ◽  
Superabsorbent Hydrogels

It is very important to develop controlled-release fertilizers to ensure efficiency and environmental protection. This study aims to make a superabsorbent hydrogel-based controlled-release urea fertilizer. Superabsorbent hydrogels were prepared from the cellulose of corn cobs cross-linking with epichlorohydrin, and then an amount of urea as a fertilizer was stored inside the hydrogels (GEL-A). The GEL-A functionalization with carboxy-methyl was also carried out in this study to improve the hydrophilicity of hydrogels (GEL-B). GEL-A and GEL-B were immersed in water at a certain pH and temperature range and the urea concentration released from the hydrogels was monitored by a spectrophotometer. The results showed that the urea released by GEL-A and GEL-B was not much different. Respectively, the urea efficiency of GEL-A and GEL-Bwas around 5.29% and 5.56% for 180 min. The urea released from both hydrogels was not significantly affected by changes in the temperature of the solution. Urea release was influenced by pH, and the rate of urea release of GEL-B was faster than GEL-A, so pH control was needed in the application of this slow-release fertilizer.

Soil microbial community response to controlled-release urea fertilizer under zero tillage and conventional tillage

2010 ◽  
Vol 45 (3) ◽  
pp. 254-261 ◽  
Author(s):  
Newton Z. Lupwayi ◽  
Cynthia A. Grant ◽  
Yoong K. Soon ◽  
George W. Clayton ◽  
Shabtai Bittman ◽  
...  
Keyword(s):  
Microbial Community ◽  
Controlled Release ◽  
Soil Microbial Community ◽  
Conventional Tillage ◽  
Community Response ◽  
Zero Tillage ◽  
Urea Fertilizer ◽  
Soil Microbial ◽  
Controlled Release Urea

Synthesis of Biodegradable Mixing-Polymer as Coating Material for Controlled-Release Urea Fertilizer

2019 ◽  
Vol 1152 ◽  
pp. 43-51 ◽  
Author(s):  
Huu Trung Nguyen ◽  
Van Dat Doan ◽  
Van Dung Trinh
Keyword(s):  
Controlled Release ◽  
Low Cost ◽  
Coating Material ◽  
Urea Fertilizer ◽  
Bonding Structure ◽  
Physico Chemical ◽  
Coating Method ◽  
Urea Release ◽  
Kinetics Of ◽  
Controlled Release Urea

The biodegradable mixing-polymer as low cost, environmentally friendly coating material for controlled-release urea fertilizer was synthesized by borax crosslinked phosphated distarch phosphate (PDSP)/polyvinyl alcohol (PVA) and polyacrylic acid (PAA) via pan coating method. The physico-chemical characteristics of biodegradable mixing-polymer were confirmed by FTIR, TGA and SEM techniques. The kinetics of urea release were also carefully investigated in water and soil. It’s been found that a uniform layer with better bonding structure was created on surface of the mixing-polymer PDSP/PVA-PAA and the time released 70% urea reached 6 hours in water and more than 27 days in soil.

Sign in / Sign up

Export Citation Format

Share Document