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    Effect of different drip irrigation regimes on sugar beet (Beta vulgaris L.) yield, quality and water use efficiency in Middle Anatolian, Turkey
    (SPRINGER, 2011) Topak, Ramazan; Suheri, Sinan; Acar, Bilal
    Agricultural production has forced researchers to focus on increasing water use efficiency by improving either new drought-tolerant plant varieties or water management for arid and semi-arid areas under water shortage conditions. A field study was conducted to determine effects of seasonal deficit irrigation on plant root yield, quality and water use efficiency (WUE) of sugar beet for a 2-year period in the semi-arid region. Irrigations were applied when approximately 50-55% of the usable soil moisture was consumed in the effective rooting depth at the full irrigation (FI) treatment. In deficit irrigation treatments, irrigations were applied at the rates of 75, 50 and 25% of full irrigation treatment on the same day. Irrigation water was applied by a drip irrigation system. Increasing water deficits resulted in a relatively lower root and white sugar yields. The linear relationship between evapotranspiration and root yield was obtained. Similarly, WUE was the highest in DI25 irrigation conditions and the lowest in full irrigation conditions. According to the averaged values of 2 years, yield response factor (k (y) ) was 0.93 for sugar beet. Sugar beet root quality parameters were influenced by drip irrigation levels in both years. The results revealed that irrigation of sugar beet with drip irrigation method at 75% level (DI25) had significant benefits in terms of saved irrigation water and large WUE, indicating a definitive advantage of deficit irrigation under limited water supply conditions. In an economic viewpoint, 25% saving of irrigation water (DI25) caused 6.1% reduction in the net income.
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    Energy and water use for drip-irrigated potato in the Middle Anatolian region of Turkey
    (WILEY, 2016) Yavuz, Duran; Suheri, Sinan; Yavuz, Nurcan
    This study was conducted to determine the energy consumption and the relationship between energy input and yield for drip-irrigated potato under Middle Anatolian climatic conditions in Konya, Turkey. Also, the specific amount of energy consumed in irrigation was determined for both surface water and ground water sources. The experiment was carried out during the growing periods of 2008 and 2009. The results showed that total energy inputs were 63,222 MJha(-1). About 62% of the total energy inputs in potato production were found to be indirect energy (seeds, fertilizers, chemicals, machinery, and polyethylene pipe) and 38% was direct energy (human labor, electricity, and diesel). Irrigation consumed the most energy, accounting for 43.8% of total energy inputs. Amongst the direct energy inputs, irrigation had the maximum share of direct energy viz. 15,473 MJha(-1), which was almost 65% of direct energy input. Specific energy consumption of a drip irrigation system that takes water from surface and ground water sources was found to be 1.85 and 2.53 MJm(-3) respectively. When the per unit volume of irrigation water was applied to the field, the specific energy consumption of drip systems was higher for ground water than surface water sources, and the difference between those systems was about 37%. (c) 2015 American Institute of Chemical Engineers Environ Prog, 35: 212-220, 2016