EFFECTS OF DIFFERENT SOWING DENSITY ON THE GROWTH AND YIELD OF RICE OM 18
Sowing density that is an important role to raise the rice yield components and yield to the required limit. Number of cottons per crop area, which has significanty determined by sowing density is the most important factor determining 74% of rice yield. The field study determined effects of different sowing density on the growth and yield of rice OM 18 rice in the summer-autumn crop of 2022 in An Giang province, Vietnam. The field experiment was arranged to Randomized Complete Block Design included 4 treatments with four replications. Four treatment included: R1 (broadcast 70 kg/ha), R2 (90 kg/ha), R3 (110 kg/ha) and R4 (130 kg/ha). The results showed that different sowing weights significant affected on the growth and yield properties. The results showed the highest grain yield (6.99 t/ha) obtained at R2 and lowest value of treatment R4 (5.95 t/ha). When the hihger increase of sowing rice weight from 110 to 130 (kg/ha) lessened significanty the rice yield from 6.56 (R3: 110 kg/ ha) to 5.95 tons/ha (R4: 130 kg/ha), respectively. The yield component and yield of rice OM 18 had the maximum values of treatment R2 (90 kg/ha) compaired to others. Furthermore, the treatment R2 (90 kg/ha) was effectiveness of lowest limited damage of brown planhopper, blast disease, rats, anti-fall for rice OM18 and significantly reduce investment costs.
effect, growth, OM 18, rice, sowing density, yield