scholarly journals Influence of Diurnal Temperature on Nutrient Release Patterns of Three Polymer-coated Fertilizers

HortScience ◽  
2003 ◽  
Vol 38 (3) ◽  
pp. 387-389 ◽  
Author(s):  
Chad E. Husby ◽  
Alexander X. Niemiera ◽  
J. Roger Harris ◽  
Robert D. Wright
Keyword(s):  
Temperature Change ◽  
Nutrient Release ◽  
Distilled Water ◽  
Soluble Salts ◽  
Coating Technology ◽  
N Content ◽  
Diurnal Temperature ◽  
Effects Of Temperature ◽  
Coated Fertilizers

This study was conducted to determine the effects of temperature on nutrient release patterns of three polymer-coated fertilizers (PCFs), each using a different coating technology: Osmocote Plus 15N-3.93P-9.96K, Polyon 18N-2.62P-9.96K, and Nutricote 18N-2.62P-6.64K. Each fertilizer was placed in a sand-filled column and leached with distilled water at ≈100 mL·h-1, while being subjected to a simulated diurnal container temperature change from 20 to 40 °C and back to 20 °C over a period of 20 hours. Column leachate was collected hourly and measured for soluble salts and NO3-N and NH4-N content. For all fertilizers, nutrient release increased and decreased with the respective increase and decrease in temperature. Nutrient release patterns of the three fertilizers differed, with Osmocote Plus showing the greatest overall change in nutrient release between 20 and 40 °C, and Nutricote the least.

scholarly journals 369 Influence of Temperature and Product on Nutrient Release Patterns of Three Polymer-coated Fertilizers

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 456A-456
Author(s):  
Chad E. Husby ◽  
Alex X. Niemiera ◽  
Robert D. Wright ◽  
J. Roger Harris
Keyword(s):  
Substrate Temperature ◽  
Nutrient Release ◽  
Distilled Water ◽  
Column Temperature ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Substrate Temperatures ◽  
Coated Fertilizers ◽  
Main Factor

Use of polymer-coated fertilizers (PCFs) is widespread in the nursery and greenhouse industries. Temperature is the main factor affecting nutrient release from PCFs, yet there are few reports that quantify temperature-induced nutrient release. Since container substrate temperatures can be at least 40 °C during the summer, this research quantified the release of fertilizer salts in the diurnal container substrate temperature range of 20 to 40 °C. Three PCFs (Osmocote Plus 15-9-11, Polyon 18-6-12, and Nutricote18-6-8) were placed in water-filled beakers at 40 °C until one-third (Expt.1) or two-thirds (Expt. 2) of Osmocote's N was released. For Expts. 1 and 2, each fertilizer was put into sand-filled columns and leached with distilled water concurrent with column temperature incrementally increasing from 20 to 40 °C and then to 20 °C over a 20-h period. Leachate fractions were collected at every 2 °C increase and analyzed for fertilizer salts. In Expt.1 and in the range of 22 to 30 °C, salt release was highest, lowest, and intermediate for Nutricote, Osmocote, and Polyon, respectively. In the range of 38 to 40 °C, release was highest, lowest, and intermediate for Osmocote, Nutricote, and Polyon, respectively. In Expt. 2, salt release in the range of 22 to 30 °C was the same as in Expt. 1. However, at 38 to 40 °C, release was highest, lowest, and intermediate for Polyon, Nutricote, and Osmocote, respectively. Results show that salt release for PCFs are dependent on the temperature × fertilizer age interaction.

scholarly journals Experimental study of paint coatings resistance to osmotic destruction depending on water-soluble salts content on a metal surface

2019 ◽  
Vol 121 ◽  
pp. 02002
Author(s):  
Allanazar Atdaev ◽  
Arthur Mazitov ◽  
Rustam Akhmetgaliev
Keyword(s):  
Metal Surface ◽  
Salt Content ◽  
Water Soluble ◽  
Distilled Water ◽  
Regulatory Document ◽  
Soluble Salts ◽  
High Temperature And Pressure ◽  
Quantitative Content ◽  
Temperature And Pressure ◽  
Paint Coatings

The main purpose of this work is to assess the relevance of the requirements for the quantitative content of water-soluble salts on the metal surface before applying an anti-corrosion coating. To do this, a series of tests are carried out by coating the metal surface of samples with different salt content, followed by aging in distilled water at high temperature and pressure. After exposure, the defects will be analyzed. The results obtained will help to choose the maximum allowable amount of soluble salts on the metal surface, because the internal coating of field pipelines is practically beyond repair, and to fix this value in the regulatory document.

scholarly journals Effects of temperature, humidity, and diurnal temperature range on influenza incidence in a temperate region

2019 ◽  
Vol 14 (1) ◽  
pp. 11-18 ◽  
Author(s):  
Ji‐Eun Park ◽  
Woo‐Sik Son ◽  
Yeonhee Ryu ◽  
Soo Beom Choi ◽  
Okyu Kwon ◽  
...  
Keyword(s):  
Diurnal Temperature Range ◽  
Temperate Region ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Effects Of Temperature
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