Volume 17, Issue 64 (summer 2013)                   jwss 2013, 17(64): 33-43 | Back to browse issues page

XML Persian Abstract Print

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

Hejazi Mehrizi M, Shariatmadari H, ََAfyuni M. Cumulative and Residual Effect of Sewage Sludge on Inorganic P Fractions and P Availability in a Calcareous Soil . jwss 2013; 17 (64) :33-43
URL: http://jstnar.iut.ac.ir/article-1-1647-en.html
Shahid Bahonar University of Kerman , mhejazi@mail.uk.ac.ir
Abstract:   (18146 Views)
Application of sewage sludge has been considered as an organic fertilizer in arid and semi-arid regions of Iran. This study was conducted to investigate cumulative and residual effects of sewage sludge on soil inorganic fractions and their relation to phosphorus (P) availability. Two levels of application (50 and 100 Mg ha-1) and three consecutive times of sewage sludge application (1, 3 and 5 years) with a control treatment were studied in a randomized complete block split plot design with three replications. Composite soil samples were collected from 0-30 depth at the end of 5th year of application. Increasing the rate and application year of sewage sludge enhanced dicalcium phosphate (Ca2-P), octacalcium phosphate (Ca8-P), apatite (Ca10-P), aluminum phosphate (Al-P), iron phosphate (Fe-P) and available P but decreased occluded P (OC-P). Residual effect of sewage sludge application resulted in increased inorganic fractions in blocks treated for 1 year compared to control. Positive correlations were observed between inorganic P fractions and Olsen P, wheat yield and P uptake (except OC-P). We concluded that inorganic P fractions and P availability increased in sewage sludge amended soil.
Full-Text [PDF 311 kb]   (2718 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2011/09/11 | Accepted: 2012/05/13 | Published: 2013/09/16

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