[논문]파종시기 및 품종이 사일리지용 옥수수의 생육특성, 사초생산성 및 사료가치에 미치는 영향

배명진; 정승헌; 김종덕

doi:10.5333/kgfs.2022.42.1.54

[국내논문] 파종시기 및 품종이 사일리지용 옥수수의 생육특성, 사초생산성 및 사료가치에 미치는 영향
Effect of Planting Date and Hybrid on the Agronomic Characteristics, Forage Production and Feed Value of Corn for Silage 원문보기

한국초지조사료학회지 = Journal of the Korean Society of Grassland and Forage Science, v.42 no.1, 2022년, pp.54 - 60

배명진 (경상국립대학교) , 정승헌 (건국대학교) , 김종덕 (연암대학교)

초록
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최근 봄 가뭄과 이모작 작부체계로 인하여 옥수수의 파종시기가 지연되고 있다. 따라서 본 시험은 옥수수 품종을 한 달 간격으로 조기파종(4월 12일), 만기파종(5월 10일)으로 파종하였을 때 사일리지용 옥수수 품종의 생육특성, 사초 생산성 및 사료가치를 비교하기 위하여 중부지방(충남 천안)에서 4월 12일부터 8월 20일까지 수행하였다. 옥수수의 착수고는 만기파종이 조기파종보다 높았으나(p<0.05), 초장은 품종간에 유의적 차이가 없었다. 내도복성은 품종간에 차이가 있었으나(p<0.01) 파종시기간에 차이가 없었다. 반면 내충성은 품종간에 차이가 없었으나 파종시가간에는 차이기 있었다(p<0.05). 흑조위축병(RBSDV) 이병률은 만기파종이 조기파종보다 낮았다(p<0.001). 암이삭 비율은 품종 간에 유의적 차이가 보였다(p<0.01). 건물 및 TDN 수량도 조기파종에 비해 만기파종이 유의적인 차이를 보였다(p<0.01). 조단백질은 파종시기간에 유의적 차이는 보였지만, 품종간에 유의적 차이는 나타나지 않았다. 만기파종의 ADF 함량은 조기파종보다 낮았으나(p<0.01), NDF 함량은 품종 간에 유의적 차이가 없었다. 조기파종보다 만기파종의 TDN 및 비유정미에너지(NE_L)가 높았다. 따라서 우리나라 각 지역별 기후와 강수량을 고려하여 이모작 작부체계에 적합한 동계사료작물을 재배 후 여름사료작물인 사일리지용 옥수수의 파종시기를 5월 중순까지 늦추어도 생산성 및 사료가치가 높을 것으로 사료된다.

Abstract ▼ AI-Helper

The planting date of corn for silage has been delayed because of spring drought and double cropping system in Korea. This experiment was conducted to evaluate agronomic characteristics, forage production and feed value of corn at April and May in 2019. Experimental design was a split-plot with three replications. Planting dates (12 April and 10 May) were designated to the main plot, and corn hybrids ('P0928', 'P1543' and 'P2088') to the subplot. The silking days of the early planting date (12 April) was 79 days and that of the late planting date (10 May) was 66 days (p<0.0001), however, there were no significant differences among the corn hybrids. Ear height of the late planting date was higher than that of the early planting (p<0.05), while there were no significant differences in plant height of corn. Insect resistance at the early planting was lower than that of late planting (p<0.05), however, lodging resistance was no significant difference at planting date. The rice black streaked virus (RBSDV) infection of early planting was 3.7% and that of late planting was 0.3% (p<0.001). Dry matter (DM) contents of stover, ear and whole plant had significant difference at planting date (p<0.05). And differences in ear percentages were observed among the corn hybrids (p<0.01). And ear percentages of early maturing corn ('P0928') was higher than for other hybrids. Ear percentage at the early planting date was higher than that at the late planting date (p<0.01). DM and total digestible nutrients (TDN) yields had significant difference at planting date, however, there were no significant differences among the corn hybrids. DM and TDN yields at the late planting (21,678 kg/ha and 14,878 kg/ha) were higher than those of the early planting (13,732 kg/ha and 9,830 kg/ha). Crude protein content at the early planting date was higher than that of the late planting. Acid detergent fiber content of the late planting was lower than that of the early planting date (p<0.01), while there were no significant neutral detergent fiber content difference among the corn tested. Calculated net energy for lactation (NEL) and TDN at the early planting were higher than those of at the late planting (p<0.01). Results of this our study indicate that the late planting date (May) is better than early planting date (April) in forage yield and feed value of corn. Therefore, the delay of planting date by May was more suitable for use in cropping system.

Keyword

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