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Effect of Different Seeding Dates on Agronomic Characteristics and Productivity of Sudangrass hybrid and Oat in Cropping After Corn for Silage in Kyeongbuk

경북지역에서 옥수수 후작 수단그라스간 교잡종 및 귀리의 파종시기가 생육특성 및 수량성에 미치는 영향

  • Received : 2014.04.07
  • Accepted : 2014.05.12
  • Published : 2014.06.30

Abstract

This study was conducted to evaluate the effect of different seeding dates on agronomic characteristics, forage quality, dry matter (DM) and dry matter digestible (DDM) yields of sudangrass hybrid (Sorghum bicolor(L.) Moench) and oat (Avena sativaL.) at Seongju in Kyeongbuk from 2012 to 2013. The experiment was arranged in randomized complete block design with three replications. Sudangrass was seeded five times seeding dates of 10 days interval ranging from $1^{th}$ August to $10^{th}$ September in 2012 and 2013. Oat was seeded three times seeding dates of 10 days interval ranging from $20^{th}$ August to $10^{th}$ September in 2013. Sudangrass was harvested on $26^{th}$ October, 2012 and $2^{nd}$ November, 2013. Plant length and DM content decreased with delaying seeing date. The DM and DDM yields of sudangrass were higher (P<0.05) in first seeding date than all other seeding dates and decreased with delaying seeding dates (P<0.05). The DM and DDM yields of oat were higher (P<0.05) in first and second seeding dates than third seeding date. The results of this study indicated that early seeding of sudangrass would be a recommended than late seeding after $20^{th}$ of August, and late seeding of oat after $30^{th}$ August would be recommened for DM and DDM yields in the Southern Korea.

본 시험은 2012년부터 2013년까지 경북 성주에서 사일리지용 옥수수 후작 수단그라스간 교잡종 및 귀리의 파종기가 생육특성, 품질 및 수량성에 미치는 영향을 알기 위해서 실시하였다. 시험설계로 수단그라스는 파종기를 처리로 한 5처리 3반복 귀리는 파종기를 처리로 한 3처리 3반복으로 배치하였다. 수단그라스의 파종기는 2012년과 2013년에 7월 31일부터 9월 10일까지 10일 간격으로, 귀리는 2013년 8월 20일부터 9월 10일까지 10일 간격으로 조파하였다. 수확은 2012년 10월 26일과 2013년 11월 2일에 하였다. 수단그라스의 출수는 3차 파종기까지만 되었고 귀리는 2차 파종기의 것만 출수 되었다. 초장과 건물함량은 파종기가 지연됨에 따라 감소되었다. 수단그라스의 DM 및 DDM 수량은 1차 파종기의 것이 다른 4파종기의 것보다 높았으며(P<0.05) 파종기 간에는 파종기가 지연됨에 따라 감소되었다(P<0.05). 귀리의 DM 및 DDM 수량은 1차 및 2차 파종기 간에는 차이가 없었으나 3차 파종기의 것이 낮았다(P<0.05). 수단그라스와 귀리의 CP 함량은 파종기 간에 다소 차이는 있지만 파종기가 지연됨에 따라 증가된 반면 ADF와 NDF의 함량은 감소되어 DDM 함량은 증가되었다. 본 시험의 결과에 의하면 가을재배 수단그라스의 파종시기는 8월 20일 이전 귀리의 파종시기는 8월 30일 이전까지 파종해야 수량측면에서 유리할 것으로 생각된다.

Keywords

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