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Effect of Seeding Dates on Yield and Quality of Various Oat Cultivars for Year-Around Forage Production

생태형이 다른 귀리품종의 파종기별 조사료 생산성 및 사료가치

  • Received : 2012.08.13
  • Accepted : 2012.09.19
  • Published : 2012.09.30

Abstract

Most oats are used for livestock feed in the world. This experiment was conducted at Iksan city of Korea from 2007 to 2008. The objective of this study was to select eminent oat (Avena sativa L.) cultivars with high-yielding and a quality for forage adaptable in each planting seasons. Experimental design was split-plot design with three replications. A split plot design was used with seeding date on the main plots and other treatments fully randomized in sub-plots. A factorial arrangement of treatments included three different ecotypes cultivars, winter type (Sanmhan, Donghan and Chohan), summer type (High-speed, Darkhorse, and Swan), and naked oats near to spring type (Daeyang, Choyang, and Sunyang) and twelve seeding dates (twice a month from March to November). Plant height, dry matter yield, and percent TDN was significantly affected by seeding dates, cultivars, and the interaction of cultivars ${\times}$ seeding dates. There was a decrease in plant height, dry matter yield, and percent total digestible nutrients (TDN) as seeding was delayed from early March to late June and it also from early September to early November. The winter type oat cultivars such as Samhan, Donghan, and Chohan adapted to fall seeding and early summer harvest, while summer type cultivars such as High-speed, Darkhorse, and Swan showed high productivity either to summer seeding and mid-fall harvest or to spring seeding and early summer harvest. Naked type cultivars, Choyang and Daeyang, showed high forage yield by spring and summer seeding except for fall seeding because of cold damage. Summer type oat cultivars such as High-speed, Darkhorse, and Swan can supplement high forage production in spring. TDN yield showd the most at seeding in October 10 (780 kg $10a^{-1}$), followed at seeding in March 23 (627 kg $10a^{-1}$).

이 시험은 양질 조사료의 연중생산에 알맞은 각 시기별 국내 육성 귀리 적품종을 선발하기 위해 하파용인 하이스피드, 다크호스, 스완(도입종)과 추파형인 삼한, 동한, 조한 및 내한성이 약한 쌀귀리인 선양, 대양, 조양 등 각각 생태형이 다른 9개 품종을 공시하고 3월부터 11월까지 한 달에 2회씩 파종한 후 유숙기에 수확하여 생육, 조사료 수량성 및 사료가치를 평가하였다. 출현 및 출수소요일은 춘파에서 하파로 갈수록 짧아지다가 하파에서 추파로 갈수록 길어지는 경향이었다. 초장은 파종기가 춘파에서 하파로 갈수록 짧아졌으며, 추파의 경우는 파종기가 빠를수록 초장이 길었다. 생초 및 건물수량은 춘파보다 추파에서 많았으며, 춘파와 추파 모두에서 파종기가 늦어질수록 유의하게 감소하였다. 그리고 각 절기별 생산성으로 볼 때 추파에서는 추파형> 쌀귀리> 하파형 귀리, 춘파에서는 하파형> 쌀귀리> 추파형 귀리, 하파에서는 하파형> 쌀귀리> 추파형 귀리 순으로 수량이 높았다. 조단백질 함량은 춘파인 3월 9일 파종구에서 평균 5.4%로부터 하파인 8월 17일 파종에서 평균 13.5%로 파종기가 여름에 가까워질수록 증가하다가 그 이후 추파에서 10% 수준을 유지하였다. NDF, ADF 및 TDN 함량은 춘파나 추파에 비해 8월 17일과 9월 10일에 파종한 하파구에서 NDF와 ADF 함량이 낮고 TDN 함량이 높은 경향을 보였다. 파종기별 TDN 수량은 10월 12일 추파구에서 780 kg/10a로 가장 높았고, 3월 23일 춘파구에서 627 kg/10a로 그 다음이었으며, 8월 17일 하파구에서 182 kg/10a으로 가장 낮았다. 추파구에서는 10월 12일 파종으로부터 만파할수록 TDN 수량이 감소하였다. 각 절기별로 조사료 생산에 적합한 우수 품종은 춘파의 경우 하이스피드 조양 다크호스 스완, 하파에서는 다크호스 스완 조양 하이스피드, 월동용 파종에서는 삼한 조한 동한이었다. 하파용으로 개발된 다크호스, 하이스피드, 스완 (도입종)과 쌀귀리 품종 조양은 춘파에서도 높은 수량성을 보여 춘파나 하파 등에서 광범위하게 활용할 수 있는 것으로 확인되었다.

Keywords

References

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