본 연구에서는 수수의 생산량 증대와 자급률 향상을 위한 체계적인 재배기술을 확립하기 위한 기초자료를 얻고자 재식밀도 및 멀칭유무에 따른 생육 및 수량에 미치는 영향을 알아보았다.
멀칭유무에 따른 간장, 간경 및 지상부 생체중 모두 비닐멀칭구에서 길거나, 굵게 또는 무겁게 나타났으며 수량성에서도 116% 및 132%로 1, 2년차 모두 비닐멀칭구에서 높게 나타났다. 간장에서는 재식밀도가 높은 10 cm처리구에서 재식밀도가 낮은 30 cm처리구보다 각각 21.5, 23.3 cm 길게 나타났으며 간경에서는 간장과 반대로 재식밀도가 낮을수록 굵어져 30 cm 처리구에서 가장 굵은 21.7, 17.6 mm로 나타났다. 지상부생체중은 20 cm처리구에서 높은 값이 나타났다. 수량구성요소를 보면 재식밀도에서 이삭장, 종실중 및 천립중 모두 재식밀도 낮을수록 길거나 무겁게 나타났으나 수량에서는 연차간 모두
20 cm처리구에서 451 kg 10 a−1, 358 kg 10 a−1 으로 가장 높게 나타났다.
This study was conducted to evaluate effects of planting densities (60 × 10 cm, 60 × 20 cm, 60 × 30 cm) and mulching method (polyethylene plastic (P.E.), open) for 2 years in sorghum field. In P.E. plots, culm length, culm diameter and fresh weight were higher than non-mulched plot. Additionally, spike length, seed weight per hill and thousand seed weight were also higher at P.E. plot than non mulched plot. The seed yield of sorghum were higher 116% and 132% at P.E. plot than non-mulched plot in 1st and 2nd year, respectively. In mulched plot with 60 × 30 cm planting distance, culm length were 21.5 and 23.3 cm in 1st and 2nd year which were higher than non-mulched plot, however culm diameter were higher in non-mulched plot than mulched plot without statistical significance. The growth characteristics were positively related with planting density, however, yield related characteristics, spike length, seed weight per hill and thousand seed weight, were negatively related with planting density. The seed yield was highest at 60 × 20 cm plot 451 and 357 kg 10 a−1 in 1st and 2nd year, respectively. And it was followed by 60 × 10 cm plot and 60 × 30 cm plot.