Volume 22, Issue 1 (Spring 2018)                   jwss 2018, 22(1): 267-278 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Atar Shahraki S Z, Hosseinpur A R, Motaghian H R, Ghorbani S. Kinetics of Non-exchangable Potassium Release in Aggregates with Different Sizes in a Number of Calcareous Soils. jwss 2018; 22 (1) :267-278
URL: http://jstnar.iut.ac.ir/article-1-3202-en.html
1. Dept. of Soil Sci., Faculty of Agric., Shahrekord Univ., Shahrekord, Iran. , motaghian.h@yahoo.com
Abstract:   (8078 Views)
The study of the kinetics of non-exchangeable potassium (NEK) release is very important for a better understanding of K availability for plants in different soils. Moreover, aggregates with different sizes have different effects on the release of nutrients. Therefore, the aim of this study was to examine the release of NEK in 5 calcareous soils of chaharmahal-va- bakhtiari province, and small and large aggregates (<250 μm and >250 μm) using CaCl2 0.01 M at 25±1ºc for 2-2017 h. The results showed that cumulative released NEK in soils, and small and large aggregates was 173.5-372.7, 215.1-426.1 and 178.9-381.5 mg kg-1, respectively. The results revealed that coefficients of the cumulative released NEK in small aggregates was lower than those of the soils and large aggregates. Based on the coefficient of determination (R2) and standard error (SE), the released NEK was well described by the first order, the power function, parabolic diffusion, and simplified Elovich equations. The rate coefficients of the release of K were different in different soils. The cumulative released amount of K and its rate of release in a solution of calcium chloride in small aggregates was more than those of large aggregates.
Full-Text [PDF 653 kb]   (1437 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2016/01/18 | Accepted: 2018/01/24 | Published: 2018/06/15

Add your comments about this article : Your username or Email:

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb