Monitoring sugar beet rooting depth irrigated with recycled waste water and different irrigation methods for water savings in an arid climate
Publish place: Iran Agricultural Research، Vol: 35، Issue: 1
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IAR-35-1_003
تاریخ نمایه سازی: 13 شهریور 1402
Abstract:
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 ۲۰۰۵-۲۰۰۶ 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= ۱.۵۲ dS m-۱ and fresh water: EC=۰.۵۱ dS m-۱) 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<۰.۰۵) in root depth was observed for the crops irrigated with recycled wastewater and fresh water. A good correlation (R۲ = ۰.۹۹) 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 ۲۰% and ۳۴% when compared to the empirical models developed in other regions. The highest root yield obtained was ۸۰ tha-۱ by surface drip irrigation with recycled waste water and the lowest was ۴۱.۴ t ha-۱ by furrow irrigation with fresh water.
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Authors
Ali Hassanli
Department 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
Sh. Ahmadirad
Department of Natural Resources and Environment, College of Agriculture, Shiraz University, Shiraz, I. R. Iran
S. Beecham
School of Natural and Built Environments, University of South Australia, Adelaide, SA, Australia
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