Abstract
In this study, to clarify the effects of sowing time on the emergence of quinoa (Chenopodium quinoa Willd.), we evaluated the effects of water potential in soil, temperature and sowing depth on the emergence of quinoa. In field experiments, the emergence ratio of August sowing plots was lower than that of the June and October sowing plots. The water potential and temperature of soil after sowing in August sowing plot moved higher than those of the other plots. Emergence ratio of quinoa was not affected by the temperature from 20℃ to 34℃. And emergence ratio of quinoa was not affected by the water potential in soil from –5kPa to –20kPa at sowing. However, the quinoa did not emerged at –40kPa of water potential. From above that, we considered that the changes of emergence ratio with sowing time were affected by the dry condition of soil after sowing. And from –5kPa to –20kPa of water potential in soil at sowing time, the emergence ratio of 1.0cm sowing depth was higher than that of the other sowing depth. In this study, the optimum sowing depth of quinoa was 1.0cm.
