Bio‐based epoxy modified with nano‐SiO 2 and organosilicon for controlled‐release urea

2021 ◽  
pp. 51810
Author(s):  
Songling Chen ◽  
Yanyu Han ◽  
Chunyu Chen ◽  
Hongdou Liu ◽  
Hongtao Zou
Keyword(s):  
Controlled Release ◽  
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.

The effects of controlled release urea on maize productivity and reactive nitrogen losses: A meta-analysis

2019 ◽  
Vol 246 ◽  
pp. 559-565 ◽  
Author(s):  
Wushuai Zhang ◽  
Zhengyuan Liang ◽  
Xiaoming He ◽  
Xiaozhong Wang ◽  
Xiaojun Shi ◽  
...  
Keyword(s):  
Controlled Release ◽  
Meta Analysis ◽  
Nitrogen Losses ◽  
Reactive Nitrogen ◽  
Maize Productivity ◽  
Controlled Release Urea

scholarly journals Reducing nitrogen pollution while improving tomato production by controlled-release urea application

2018 ◽  
Vol 64 (5) ◽  
pp. 632-641 ◽  
Author(s):  
Jungang Yang ◽  
Shangqiang Liao ◽  
Yanmei Li ◽  
Bing Cao ◽  
Yanxin Sun ◽  
...  
Keyword(s):  
Controlled Release ◽  
Nitrogen Pollution ◽  
Tomato Production ◽  
Controlled Release Urea

scholarly journals Controlled Release Urea as a Nitrogen Source for Spring Wheat in Western Canada: Yield, Grain N Content, and N Use Efficiency

2001 ◽  
Vol 1 ◽  
pp. 114-121 ◽  
Author(s):  
Lenz Haderlein ◽  
T.L. Jensen ◽  
R.E. Dowbenko ◽  
A.D. Blaylock
Keyword(s):  
Controlled Release ◽  
Crop Yields ◽  
N Use Efficiency ◽  
Western Canada ◽  
N Losses ◽  
Application Range ◽  
Woody Perennials ◽  
Use Efficiency ◽  
N Use ◽  
Controlled Release Urea

Controlled release nitrogen (N) fertilizers have been commonly used in horticultural applications such as turf grasses and container-grown woody perennials. Agrium, a major N manufacturer in North and South America, is developing a low-cost controlled release urea (CRU) product for use in field crops such as grain corn, canola, wheat, and other small grain cereals. From 1998 to 2000, 11 field trials were conducted across western Canada to determine if seed-placed CRU could maintain crop yields and increase grain N and N use efficiency when compared to the practice of side-banding of urea N fertilizer. CRU was designed to release timely and adequate, but not excessive, amounts of N to the crop. Crop uptake of N from seed-placed CRU was sufficient to provide yields similar to those of side-banded urea N. Grain N concentrations of the CRU treatments were higher, on average, than those from side-banded urea, resulting in 4.2% higher N use efficiency across the entire N application range from 25 to 100 kg ha-1. Higher levels of removal of N in grain from CRU compared to side-banded urea can result in less residual N remaining in the soil, and limit the possibility of N losses due to denitrification and leaching.

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