Velocidade de semeadura e profundidade da semente no sulco afetando a produtividade de grãos do arroz de terras altas

Abstract

The uniformity of sowing in the agricultural areas can be affected by several factors, such as the speed of the tractor-sowing set and the depth of placement of the seed in the sowing furrow. These factors can significantly affect the grain yield of crops. The objective of this work was to quantify the effect of sowing velocity and depth of seed placement on the furrow in plant stand, seedling emergence speed index, yield components and grain yield of upland rice. The experimental design was randomly blocks in factorial scheme 3x2, with four replicates. The treatments consisted of the combination of three sowing speeds (3, 5 and 7 km h-1) with two depths of seed placement in the sowing furrows (3 and 6 cm). Sowing depth significantly affected the seedling emergence speed index and plant stand of rice, without affecting the number of tillers, number of panicles, number of grains per panicle, mass of 1000 grains and grain yield. Sowing speed did not affect seedling emergence speed index, plant stand, number of tillers, number of panicles and mass of 1000 grains. On the other hand, it affected the number of grains per panicle and the grain yield of rice.