Effects of row spacing and seed rate on oats agronomic traits and yield
Oat(Avena sativa L.)is an important annual forage crop in semiarid regions of China.In order to explore the appropriate row spacing and seed rates of oats in North China,3 row spacing levels and 3 seed rates levels were set respectively through a double factors completely random block experiment design to study the effects of different row spacing and seed rates combinations on oats yield and related agricultural traits.The re-sults showed that compared with row spacing,seed rate was the main factor affecting oat plant height,and the effect of row spacing on plant height was not significant.Row spacing and seed rate had no significant effect on stem length and number of stem nodes.The width and length of leaves decreased with the increase of seed rate.Panicle length and spikelet number were greatly affected by seed rate,but less affected by row spacing.Row spacing and seed rate had influence on hay yield and seed yield,and seed rate had greater influence on hay yield and seed yield than row spacing.The hay yield and seed yield were the highest with narrow row spacing S1(15 cm)and low seed rate DI(3,000,000 seeds/hm2).The results of correlation analysis showed that the dry weight per tiller was most related to the hay yield,followed by the ratio of dry to fresh.
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