This investigation was carried out during the two summer seasons of 2016 and 2017 at Rice Research Department, Experimental Farm, Sakh, Kafrelsheikh Governorate, Egypt. The purpose was to study the response of Sakha 107 rice cultivar to irrigation intervals and Silicon sources under broadcast-seeded method. A strip-plot design with four replications, was used. The horizontal ports were devoted to the four irrigation interval, i.e. continuous flooding, irrigation every 6 days, irrigation every 9 days and irrigation every 12 days.. While, the different silicon sources; namely, potassium silicate, magnesium silicate and silica gel, as well as, the check treatment (without silicon application) were assigned in the vertical plots. The results cleared that, both continuous flooding and irrigation every 6 days gave the maximum values for number of tillers/m², chlorophyll content, number of panicles/m² number of grains/panicle, 1000-grain weight and grain yield, as well as, hulling and milling percentages without any significant differences during both seasons. However, the maximum significant values of flag leaf area, filled grains percentage, straw yield and head rice percentage were recorded with continuous flooding and significantly decreased with increasing irrigation intervals. The highest values of water use efficiency were obtained by 6 days interval. On the other side, irrigation every 12 days gave the lowest values of the studied mentioned traits, as well as, the longest vegetative growth period. Potassium silicate gave the highest values of plant height, number of panicles/m², number of grains/panicles filled grains parentage and 1000-grain weight, as well as, grain yield and milling percentage. While, the largest area of flag leaf and the highest percentages of hulling and head rice were obtained by either potassium silicate or magnesium silicate, which recorded the highest chlorophyll content in flag leaves comparing to check treatment. Thus, irrigation every 6 days could be the adequate water regime and potassium silicate as source of silicon could be mitigate the harmful effects of water shortage, improve grain yield and water use efficiency for Sakha 107 rice cultivar under broadcast-seeding method.