Monitoring sugar beet rooting depth irrigated with recycled waste water and different irrigation methods for water savings in an arid climate | ||
| Iran Agricultural Research | ||
| مقاله 3، دوره 35، شماره 1، شهریور 2016، صفحه 21-26 اصل مقاله (548.9 K) | ||
| شناسه دیجیتال (DOI): 10.22099/iar.2016.3455 | ||
| نویسندگان | ||
| Ali morad Hassanli* 1؛ Sh. Ahmadirad2؛ S. Beecham3 | ||
| 1Department of Natural Resources and Environment, College of Agriculture, Shiraz University, Shiraz, I. R. Iran; School of Natural and Built Environments, University of South Australia, Adelaide, SA, Astralia | ||
| 2Department of Natural Resources and Environment, College of Agriculture, Shiraz University, Shiraz, I. R. Iran | ||
| 3School of Natural and Built Environments, University of South Australia, Adelaide, SA, Australia | ||
| چکیده | ||
| ABSTRACT- A detailed understanding of crop rooting systems will facilitate water use reduction, optimized nutrient uptake and irrigation scheduling more efficiently. A field experiment was conducted during 2005-2006 to investigate sugar beet rooting depth growth, irrigated with three irrigation methods (subsurface drip, surface drip and furrow) and two water qualities (recycled wastewater: EC= 1.52 dS m-1 and fresh water: EC=0.51 dS m-1) in order to improve irrigation water management. A local rooting depth model was developed and three empirical models describing the root growth were evaluated. A significant reduction in sugar beet root depth was observed in the plots irrigated with furrows compared to those irrigated with the pressure irrigation methods. However, no significant difference (p<0.05) in root depth was observed for the crops irrigated with recycled wastewater and fresh water. A good correlation (R2 = 0.99) between root depth and time was observed. The results also showed that using a locally developed rooting depth model to predict the soil water depletion may lead to water savings of between 20% and 34% when compared to the empirical models developed in other regions. The highest root yield obtained was 80 tha-1 by surface drip irrigation with recycled waste water and the lowest was 41.4 t ha-1 by furrow irrigation with fresh water. | ||
| کلیدواژهها | ||
| Keywords:؛ Root depth models؛ Root depth monitoring؛ Recycled wastewater؛ Sugar beet | ||
| مراجع | ||
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