Irrigation Regime and Its Impact on the Paddy Rice Yield under the Climatic Conditions of the Upper Thracian Plain

Abstract

During the period 2009-2011, on the plot of land with Cinnamonic Forest soil in the Agricultural Experimental Station of Irrigative Agricultute, Pazardzhik, a field experiment was set with varieties under the conditions of constantly maintained water layer and a wet surface. The aim of the test was to study the rice culture growth and to determine the productivity of the tested rice varieties under the optimal irrigation regime and a maintained wet surface. On average for these three years, we obtained the highest yield from the variety Dani – 628.2 kg/da, grown on a maintained wet surface, and the lowest from the variety Baldo – 528.8 kg/da, grown by the conventional irrigation methods in the region. The remaining agro-technical activities were same for both plots of lands where the study was conducted.