Effect of Seeding Rate and Inter-Row Spacing on Yield and Yield Components of Upland Rice (Oryza sativa L.) at Libo Kemkem District, Northwestern Ethiopia
Abstract: Upland rice is a major cereal crop in Libokemkem District. However, yield of the crop is low due to lack of recommendation on site specific seeding rate and inter-row spacing. Hence, a field experiment was conducted at Libokemkem District during the main rainy season of 2018 to study the effect of seeding rate and inter-row spacing on grain yield and yield component on upland rice under rain-fed conditions. Two factorial combinations of seven seeding rates (40, 60, 80, 100, 120, 140 and 160 kg ha1) and four inter-row spacing (15, 20, 25 and 30 cm) were used. The treatments were arranged in Randomized Complete Block Design with three replications. Data of phenological, vegetative growth and yield and yield related parameters were collected. The data were analyzed using SAS 9.0 version and mean separation for significant treatments were done by least significance difference. The result of this research showed that except for thousand seed weight, all parameters were highly significantly (p<0.01) affected by main effects of seeding rate. In addition, plant height, panicle length and grain yield were highly significantly (p<0.01) affected by main effects of inter row-spacing. Grain yield was also significantly affected by the interaction effect. The highest grain yield (5.20 t ha1) was obtained at interaction of seeding rate 100 kg ha1combined with an inter-row spacing of 15 cm. The treatment combination with 25 cm inter-row spacing had given the highest net benefit with acceptable range of marginal rate of return. Therefore, application of 100 kg ha1 seeding rate and 25 cm inter-row spacing is economically feasible and can be recommended for the study area.
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Abaynew Jemal Jenber, Misganaw Birarayalew and Tilahun Tadesse 2020. Effect of Seeding Rate and Inter-Row Spacing on Yield and Yield Components of Upland Rice (Oryza sativa L.) at Libo Kemkem District, Northwestern Ethiopia. International Research Journal of Applied Sciences, 1: 12-21