Volume 14, Issue 51 (spring 2010)                   JWSS 2010, 14(51): 45-56 | Back to browse issues page

XML Persian Abstract Print


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

Alizadeh H, Abbasi F, Liaghat A. Evaluation of Distribution Uniformity and Nitrate Losses in Furrow Fertigation . JWSS. 2010; 14 (51) :45-56
URL: http://jstnar.iut.ac.ir/article-1-1208-en.html
Abstract:   (29399 Views)
The application of N fertilizers with surface irrigation stream (surface N fertigation( is a key approach for fertilizer management. The main objective of this study was to investigate furrow fertigation management effects on distribution uniformity and runoff losses of nitrate in field scale. A field corn experiment was carried out with a complete randomized block design having 12 experiments. The field experiments were carried out in free draining furrows having 165 m length and 0.006 m/m slope in Karaj. Required urea fertilizer was applied in four stages: before planting, in seven leaves stage, shooting stage and earring stage. The first stage was accomplished by traditional method and other stages were applied with irrigation water (fertigation). Fertigation timing was respectively 60, 35, and 20 min in the three fertigation stages. Results showed that distribution uniformity of water and fertilizer of low half (DULH) provided high values for all experiments. DULH ranged between 88.0 to 99.0% and 89.7 to 96.0%, respectively for water and fertilizer. Also, distribution uniformity of low quarter (DULQ) ranged between 86.0 to 98.2% and 85.7 to 91.5%, respectively for water and fertilizer. Nitrate losses through surface runoff ranged between 5.7 to 42.0%. Duncan test results for comparison between different experiments showed that there was significant difference (p=0.95) between fertilizer losses at the level of fertilizer injection time of 60 and 35 minutes, but there was no significant difference between levels of 35 and 20 minutes.
Full-Text [PDF 306 kb]   (1875 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2010/09/14

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

© 2019 All Rights Reserved | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb