넓은이랑 줄뿌림 파종 시 재식밀도에 따른 기장의 생육 및 수량

Effects of Planting Density on Growth and Yield in Wide-Row Drill Seeding of Proso millet (Panicum miliaceum L.)

Abstract

본 연구는 건강 기능성 기장에 대한 소비자의 선호도가 높아지면서 수요와 재배면적이 점차 확대되고 있는 기장의 생산량 증대와 자급률 향상을 위한 체계적인 안전생산 생력 재배기술을 확립하기 위한 기초자료를 얻고자 기계화 수확에 적합한 넓은이랑 줄뿌림 재배시 재식밀도에 따른 생육특성 및 수량특성에 관한 연구를 수행하였다. 1. 간장은 '황금기장'은 $50{\times}3$, 5 cm 처리구, '이백찰'은 $20{\times}3cm$ 처리구에서 가장 길게 나타났으며, 간경은 재식밀도가 높아질수록 얇아지는 경향으로 나타났다. 2. 분얼수와 이삭장은 같은 경향으로 재식밀도가 낮아질수록 많거나 길어지는 경향으로 재식밀도가 가장 낮은 $50{\times}15cm$ 처리구에서 가장 많거나 길게 조사되었다. 3. 개체당 종실수는 재식밀도가 낮아질수록 증가하였으며, 천립중은 재식밀도간 유의성은 나타나지 않았다. 4. 10a당 수량 변화에서는 '황금기장'은 $50{\times}3cm$ 처리구에서 $314.9kg{\cdot}10a^{-1}$, '이백찰'은 $50{\times}5$, 10 cm 처리구에서 $358{\sim}356kg{\cdot}10a^{-1}$으로 가장 높은 수량이 나타났다.

The goal of this study was to investigate how the characteristics of growth and yield are affected by various planting densities in wide-row drill seeding cultivation suitable for mechanized harvesting. Two cultivars ('Hwanggeum' and 'Leebackchal') of proso millet (Panicum miliaceum L.) were planted at varying planting densities [row spacing (20, 30, and 50 cm) and plant spacing (3, 5, 10, and 15 cm)]. The culm length was highest at the planting density of $50{\times}3cm$ and $50{\times}5cm$ for 'Hwanggeum' and $20{\times}3cm$ for 'Leebackchal'. The culm diameter became thinner as the planting density increased. The number of tillering and panicle length showed the same tendency to increase in quantity or length as planting density decreased and was highest at $50{\times}15cm$ when the planting density was lowest. The number of seeds per individual increased as planting density decreased. The thousand grain weight showed no significant differences among treatment plots. The greatest yield of 'Hwanggeum' was obtained at a planting density of $50{\times}3cm$ ($314.9kg{\cdot}10a^{-1}$) and that of 'Leebackchal' was obtained at $50{\times}3cm$ and $50{\times}5cm$ ($358-356kg{\cdot}10a^{-1}$).

Fig. 1. Effect of planting density on yield (kg·10 a^-1) of proso millet. A, Hwanggeum; B, Leebackchal. Bars with different letters within the same cutting time were significantly different by Duncan’s multiple range test (DMRT), p < 0.05.

Table 1. Chemical properties of soil before the experiment.

Table 2. Effects of planting density of proso millet on the growth characteristics of seedings after 50 days.

Table 3. Effects of planting density on growth characteristics at the harvesting stage of proso millet.

Table 4. Effects of planting density on yield components at the harvesting stage of proso millet.

Table 5. Analysis of variance by planting density in wide-row drill seeding of proso millet.