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조숙 옥수수에 의한 사료작물 작부체계 구성 2 : 조숙 옥수수의 사료생산성에 미치는 만파와 밀식효과
林根發,崔瑩原,楊種成,許雲行 韓國作物學會 1991 한국작물학회지 Vol.36 No.3
조숙옥수수를 포함한 사료작물 작부체계 구성시 조숙옥수수의 생산성을 확보하기 위해 만파시밀식재배를 시도하였다. 조숙옥수수로는 Comet80, Comet85, Linda 품종을 이용하였고 만파정도는 수원19호 적기보다 45, 55, 65일 만큼 늦게 파종하였다. 파종밀도는 각 파종기에 대하여 60 20, 50x20, 40 20cm로 밀식정도를 달리하였다. 각처리구의 수확은 8월 29일 일괄실시 하였는데 조숙옥수수의 이러한 처리에 따른 수량구성특성 변화와 조숙옥수수의 촉과작물 작부체계도입 가능성을 조사한 결과를 요약하면 다음과 같다. 1. 6월 22일까지 파종에서 건물수량은 Comet85, 수원19호 Comet80, Linda 순이었다. 2. 6월 12일까지의 파종에서 수원19호의 이삭비율은 6.7%이었는데 비해 Comet80, Cometss, Linda의 평균 이삭 빈율은 40.3%이었다 3. 조숙품종의 밀식에 의한 건물수량 보상효과정도는 6월 22일까지 파종에서 20x50cm밀도가 20 60cm밀도에서 보다 평균 37.3% 증수하였다. 4. 만파시 Comet85는 수원19호보다 평균 24.1 % 많은 TDN을 생산하였다. Early maturing hybrids(Comet 80, Comet 85 and Linda) and mid-late maturing hybrid (Suwon 19) were grown at Suwon to study the influence of maturity, plant population, and sowing date (45, 55, and 65 days delayed from the recommended sowing date of Suwon 19) on the dry matter yields, percentage ears and TDN yields. Com was planted at the density of 60 x 20, 50 x 20 and 40 x 20 em. Dry matter yields were not significantly different between the early and mid-late maturing hybrids in the delayed sowing time, but significantly higher in 20 x 50cm of planting density in early maturing hybrids. As sowing was delayed to Jun. 22 ear content decreased from 40.3% (early maturing hybrid) to 6.7% (Suwon 19). This resulted in significantly 24.1% higher TDN yield in Comet 85 than in Suwon 19.
임근발 한국자원식물학회 1990 한국자원식물학회지 Vol.3 No.1
Pericarp and seedcoat removal treatments were tested to determine their effectiveness in the hard-to-germinate botanical seeds of jerusalem artichoke. Fresh seed of five Helianthus tuberosus L.varieties were (A)untreated (B)water soaked overnight (C) soaked overnight followed by renoval of pericarp or (D) soaked overnight followed by renoval of pericarp and seedcoat. The results indicate that treatments which removed the pericarp and seedcoat were the very effective, giving germination of over 90%. A considerable increase in germination did not follow only the peri-carp removal treatments. The factors inhibitory to germination of fresh jerusalem artichoke seed is associated withthe seedcoat. The removal treatment of pericarp and seed-cost is recommended despite its complexity because it givesa high germination percentage and varies least from varietyto variety. Heliarthus tuberosus L., a biomass potential crop, is a member of the family compositae. The genus Helianthushas provided man with two food plants, the sunflower (H.annus) and the jerusalem artichoke or topinambour (H. tube-rosus) . (3) The jerusalem artichoke grown for its tubers, has always been an extremely minor crop, but it is stillgrown in many places as a food for man or livestock and forthe production of alcohoL. Though tubers are used for pro-pagation jerusalem artichoke also flower and produce seedin head-like in florescences. Flowers are developed acro-petaLly on flattened receptacles such that outermost flowers are oldest. Each of these epigynous flowers may develop an achene-type fruit in which outer layers of the overy wallpersist, while inner layers become disorganized. Insidethe ovary wall of mature fruit, there is a papery seedcoat, probably composed of compact cells from endosperm, integu-ments, and nucellus.In general, the efforts to improving this crop havebeen hampered by the hard-to-germinate botanical seed.Seeds did not germinate for at least IL months after harvest.Fresh seeds of some varieties require one year more to gar-minate. (5) Since the time factor between generations isof concern in a prospective breeding program of jerusalemartichoke , these observations led to investigation of thenature of delayed seed germination in jerusalem artichokeas a biomass potential crop.