Effects of Transplanting Methods on Yield of Different Rice Varieties under Sandy Soil Conditions

抄録

Rice is a staple food for Cambodians and it is also a main source of income for farmers’ livelihood in rural areas. However, rice yield is low so it is vitally important to increase rice yield through promoting new rice varieties and cultivation methods. To promote new knowledge for famers, an experiment regarding the effect of transplanting methods on rice yield of different varieties was conducted in experimental station. The experiment investigated the interaction of different transplanting methods on rice varieties and identified the best variety and transplanting methods for rice cultivation. The experimental design was based on Randomize Complete Block Design (RCBD) which had six treatments: Riang Chey variety with straight-row transplanting, Riang Chey variety with conventional transplanting, Phkar Rumduol variety with straight-row transplanting, Phkar Rumduol variety with conventional transplanting, IR66 variety with straight-row transplanting, IR66 variety with conventional transplanting and three replications. Hill spaces were 25 cm x 25 cm for straight-row transplanting method, and 15 cm to 25 cm for conventional transplanting method. The result of the experiment showed that yield component, panicle number per hill, percent of filled grains per panicle and total yield of three varieties transplanted straight-row transplanting method had significant difference with conventional transplanting method. However, the yield components, panicle length and 1000-grain weight of three varieties transplanted by using straight-row transplanting method had no significant difference from conventional transplanting. Also, the rice yield components had no interaction with the three varieties and the transplanting methods. IR 66 variety with straight-row transplanting method had the highest yield with 6.145 t/ha in average compared to conventional transplanting method with only 5.630 t/ha in average. In conclusion, among three varieties and two transplanting methods, the potential and highest yield was IR66 variety transplanted by using straight-row transplanting method.