Economic assessment of different irrigation regimes in sudan grass as a second crop
Keywords:
sudan grass, irrigation regime, economic assessmentAbstract
The experiment was conducted during the period 2014-2016 with sudan grass as second culture in the experimental field of the Agricultural Institute, Stara Zagora. In the field experience, the following options were studied: Variant 1 – no irrigation (control); Variant 2 – optimal irrigation, 70-75% of FC (100% irrigation rate); Variant 3 – irrigation as Variant 2 but with removal of first watering; Variant 4 – irrigation as Variant 2 but with removal of second watering; Variant 5 – irrigation as Variant 2 but with removal of third watering in order to establish the most effective irrigation regime for sudan grass. It has been found that the efficiency of irrigation water use in the different irrigation regimes is best expressed in optimal irrigation with three irrigations where each cubic meter of water provides 0.00402 t/ha of extra green biomass yield with near water efficiency for irrigation is the irrigation regime with a second watering system, where each cubic meter of water provides an additional extra of 0.00392 t/ha of green biomass.
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