Effect of Water Management and Rate of Seed on the Growth and Yield of RD41 under Pre-Germinated Direct Seed Method

Abstract

The study effect of water management method and rate of seed suitable to growth, yield components and yield of RD 41 rice variety under pre-germinated direct seed method. The study was conducted in dry season of 2020 in farmers’ field at Beung-Platoo subdistrict, Banphot Phisai district, Nakhon Sawan province. The 2x2 factorial in RCBD with 2 replications was set up by interacted between water management methods by; farmers’ method and wet-dry cycling method, and rates of seed by; farmers’ rate (25 kg. per rai) and suggestion by Department of Agriculture (DOA, 15 kg. per rai). The results showed that the integration between water management by wet-dry cycling method and rate of seed by DOA suggestion led to low tillering, low filled seed per panicle and low percentage of filled seed. However, rice yield from water management by wet-dry cycling method no different by water management by farmers’ method. In the others hand, the integration between water management by farmers’ method and farmers’ seed rate led to high tillering, high filled seed per panicle and high percentage of filled seed. Therefore, the suitable of water management and rate of seed will support to farmers get higher rice yields and reduce seed cost in water limit periods.