Abstract

본 연구는 답리작에서 양질의 조사료를 최대한 생산하기 위한 적정 사료작물을 선발하고자 전북 익산에서 보리(5품종), 밀(2), 호밀(3), 이탈리안 라이그라스(IRG, 3)등 4작목 13품종을 공시하여 <TEX>$1999{\sim}2001$</TEX>년까지 3년간 생육단계별로 생육특성, 수량 및 사료가치를 조사하였다. 보리의 출수기는 4월 <TEX>$26{\sim}5$</TEX>월 1일, 유숙기는 5월 중순, 유숙기<TEX>${\sim}$</TEX>황숙기 기준 건물수량은 ha당 <TEX>$6.66{\sim}10.47$</TEX>톤, 평균 ADF는 <TEX>$31.64\%$</TEX>, NDF는 <TEX>$62.2\%$</TEX>였고, 5품종 중 알보리가 가장 우수하였다. 밀은 보리에 비해 출수 및 성숙이 1주일 가까이 늦었으나 수량성이 높고 사료가치가 우수하역 유숙기<TEX>${\sim}$</TEX>황숙기 기준 건물수량은 <TEX>$7.51{\sim}11.96$</TEX>톤, 평균 ADF는 <TEX>$30.6\%$</TEX>, NDF는 <TEX>$60.1\%$</TEX>였다. 호밀은 출수기가 4월 26일경이었으며, 초장이 140cm 내외로 개화 이후 도복이 심하였고, 개화기 건물수량은 17.26톤으로 많았으며, 사료가치는 ADF <TEX>$38.6\%$</TEX>, NDF <TEX>$65.5\%$</TEX>로 가장 낮았다. 중만생 IRG는 출수가 늦어 답리작용으로 권장하기 어려웠으며, 조생 IRG는 4월 30일에 출수 되어 개화기 전후(5월 중순경) 수확이 유리하고, 개화기 기준 건물수량은 10.77톤, ADF <TEX>$31.6\%$</TEX>, NDF <TEX>$59.2\%$</TEX>로 양호하였다. 본 시험에서 벼 이앙시기, 건물생산성, 출수기, 사료가치, 도복 등을 종합고려한 유망작목은 호밀, 보리, 조생 IRG, 밀로 추정되었다. 5월 중순 벼 이앙시 적작물은 5월 상순에 수확이 가능한 호밀, 5월 하순 벼 이앙시에는 보리(알보리)와 조생 IRG, 6월 상순으로 벼 이앙시기가 늦을 경우에는 5월 하순 수확도 가능하면서 생산성과 사료가치가 높은 밀이 권장되었다. This study was carried out to select the promising forage crops for forage production in paddy field of HARI, RDA, Iksan from 1999 to 2001. The species of forage crop used in this experiment were barley(5 varieties), wheat(2), rye(3) and Italian ryegrass(IRG, 3). Stage of heading, milk and yellow ripe of barley were 26 <TEX>$April{\sim}l$</TEX> May, middle May and late May, respectively. In milk to yellow ripe stage, dry matter(DM) yield of barley was <TEX>$6.64{\sim}10.47$</TEX> MT per ha, and averaged ADF and NDF contents were <TEX>$31.6\%\;and\;62.2\%$</TEX> respectively. Albori was the most promising variety among the barley). The growth of wheat was a little late compared to that of barley, but it seemed to be crop having higher forage yield md nutritive value. In milk to yellow stage, DM yield of wheat was <TEX>$7.51{\sim}11.96$</TEX> MT per ha, and nutritive value of wheat was high(ADF <TEX>$30.6\%$</TEX> and NDF <TEX>$60.1\%$</TEX>). Heading stage of rye was <TEX>$25{\sim}27$</TEX> April, and it seemed to be suitable to harvest at heading to flowering stage because of heavy lodging after flowering. In flowering stage, DM yield of rye was 17.26 MT per ha, and nutritive value of rye was the lowest among 4 species(ADF <TEX>$38.6\%$</TEX> and NDF <TEX>$65.5\%$</TEX>). Heading stage of early maturing IRG was 30 April and it seemed to be suitable for harvest at flowering stage of middle May in cropping system. In flowering stage, DM yield of early type IRG was 10.77 MT per ha, and averaged ADF and NDF contents were <TEX>$31.6\%\;and\;59.2\%$</TEX>, respectively. The results demonstrated that the promising forage crops for forage production in paddy field were rye, barley, early maturing IRG and wheat in Honam region. In Southern region, rye harvesting at early May was recommended when considered middle May of rice transplanting period, and barley(Albori) and early maturing IRG harvesting at middle May were recommended when considered late May of rice planting period. And also, wheat with high nutritive value and possibility for harvesting at late May were recommended in case of transplanting period at early June.

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