• 한국초지조사료학회지
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• 제37권1호
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• pp.92-99
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• 2017

본 연구는 동일한 재배환경에서 수수-수단그라스 교잡종과 수단그라스 교잡종 간의 생육특성과 생산성을 조사하기 위하여 2010년부터 2011년까지 중부지역(천안)과 남부지역(김제)에서 수행되었다. 시험품종은 수수-수단그라스 교잡종인 SX-17(출수형), Jumbo(비출수형) 및 Revolution(BMR) 품종과 수단그라스 교잡종인 Choice, Sunstar 및 Piper 품종으로 하였다. 파종은 5월 5일(천안)과 5월 7일(김제)에 하였다. 수단그라스 교잡종의 출수기는 7월 12일경으로 수수-수단그라스 교잡종보다 약 2주 빨랐고, 줄기 굵기는 6mm 내외로서 수수-수단그라스보다 약 5mm 정도 가늘었다. 수단그라스 교잡종인 Choice 품종의 병해는 수수-수단그라스 교잡종들과 대등한 것으로 평가되었다. Choice 품종의 총 건물수량은 15ton/ha로서 수수-수단그라스 교잡종인 SX-17 보다 10% 정도 적었다. 수단그라스 교잡종인 Choice의 건물소화율은 66.1%, 조단백질 함량은 8.9%, NDF 함량은 65.4%, ADF 함량은 41.3%, TDN 함량은 56.3%로서 수수-수단그라스 교잡종과 대등하거나 약간 낮은 사료가치를 나타내었다. 양질조사료 생산 현장에서 연중조사료 생산 작부체계에서 수단그라스 교잡종은 생육기간이 수수-수단그라스보다 2주 정도 짧으므로 5월 하순에 파종이 가능함에 따라 동계사료작물인 이탈리안 라이그라스가 5월 중하순까지 충분히 생육할 시간을 줄 수 있어 조사료 생산성 향상과 원활한 작부체계의 운영이 기대된다.

• 한국초지조사료학회지
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• 제15권3호
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• pp.192-197
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• 1995

This experiment was conducted to evaluate the grazing performance of dairy cattle for winter rye, sorghum-sudangrass hybrid and oat including of rape in Hwa seong-gun, Kyeonggido, from 1993 to 1994. Each crops were utilized from the stage of 8-leaves to late blooming for sorghum-sudangrass, and from final leaves to soft dough for winter rye and oat plant. Under three different cropping system of winter rye-sorghum x sudangrass, spring oat-sorghum X sudangrass-autumn oat, and silage corn-autumn oat, a succeshl hehage production was available for grazing performance from April 26 to December 15, continuously. Annual dry matter yields for grazing allowance were 26.1 tontha in average of all cropping system. Autumn oat rnixtured with rape showed the highest herbage utilization with 91.6% grazing intensity and the lowest in sorghum-sudangrass with a value of 60.6- 69.1 %. Labor investment for herbage production were 805 hour in the cutting management and 339 hour per hectar in the grazing utilization.

• 한국초지조사료학회지
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• 제4권2호
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• pp.140-146
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• 1983

Sudangrass와 Sudangrass${\times}$Sorghun의 交雜種인 Pioneer 931과 Pioneer 988의 乾物生産量, 一般組成分 生産量, hemicellulose와 世胞內容物 生産量 그리고 乾物, 纖維素의 消化率 및 可消化에너지와 可消化蛋白質을 調査하였다. 1. 10a當 乾物生産量은 Sudangrass가 1,638kg으로 가장 많았고, Pioneer 988은 1,404kg, Pioneer 931은 1,282kg으로 적었다. Sudangrass와 Pioneer 988은 刈取次에 따른 影響이 比較的 僅小하였으나 Pioneer 931은 3次 刈取次에 産量의 11%로서 매우 적었다. 2. 纖維素는 消化率과 kg當 可塑化에너지값은 Pioneer 931, Pioneer 988 및 Sudangrass 順으로 낮아지는 傾向을 나타냈다. 그러나 10a當 可塑化에너지 生産量은 Sudangrass, Pioneer 988 및 Pioneer 931 順으로 各各 4,623, 4,170 및 3,970 Mcal였다. 3. 乾物의 in vitro 消化率은 草種間에 뚜렷한 傾向이 없었으나 可消化乾物 生産量은 Sudangrass, Pioneer 988 및 Pioneer 931에서 10a當 各各 1,068, 939 및 893kg의 順이었다.의 順이었다.

• 한국유기농업학회지
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• 제19권spc호
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• pp.144-147
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• 2011

The main nutritional problem of sorghum${\times}$sudangrass hybrid (Sorghum bicolor${\times}$Sorghum sudanese) silage is low quality and palatability. This experiment was conducted to evaluate whether organic com grain and crushed rice addition of sorghum${\times}$sudangrass hybrid silage increases forage quality of the silage. The sorghum${\times}$sudangrass hybrid silages with added com grain and crushed rice were similar to conventional com silage in moisture content. However organic sorghum${\times}$sudangrass hybrid silage had low pH values. Silage added with gain and byproduct had higher crude ash, acid detergent fiber (ADF) and neutral detergent fiber (NDF) contents than control com silages, while its non-fiber carbohydrate (NFC) and total digestible nutrients (TDN) showed the opposite results. Lactic acid, butyric acid and lactic percentage of total organic acid (L/T) of sorghum${\times}$sudangrass hybrid silages were higher than those of com silage, but acetic acid was higher than control. In vitro dry matter digestibility (IVDMD) of com silage was higher than other sorghum silages. Feed intake of sorghum${\times}$sudangrass hybrid silage added with crushed rice was highest among silages. Therefore, these data indicate that crushed rice and com grain added sorghum${\times}$sudangrass hybrid silage could be recommended as the most effective treatment for increasing silage quality and palatability.

• Journal of Animal Science and Technology
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• 제64권1호
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• pp.38-51
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• 2022

Whole-plant corn (Zea may L.) and sorghum-sudangrass hybrid [Sorghum bicolor (L.) Moench] are major summer crops that can be fed as direct-cut or silage. Proso millet is a short-season growing crop with distinct agronomic characteristics that can be productive in marginal lands. However, information is limited about the potential production, feed value, and ensilability of proso millet forage. We evaluated proso millet as a silage crop in comparison with conventional silage crops. Proso millet was sown on June 8 and harvested on September 5 at soft-dough stage. Corn and sorghum-sudangrass hybrid were planted on May 10 and harvested on September 10 at the half milk-line and soft-dough stages, respectively. The fermentation was evaluated at 1, 2, 3, 5, 10, 15, 20, 30, and 45 days after ensiling. Although forage yield of proso millet was lower than corn and sorghum-sudangrass hybrid, its relative feed value was greater than sorghum-sudangrass hybrid. Concentrations of dry matter (DM), crude protein, and water-soluble carbohydrate decreased commonly in the ensiling forage crops. The DM loss was greater in proso millet than those in corn and sorghum-sudangrass hybrid. The in vitro dry matter digestibility declined in the forage crops as fermentation progressed. In the early stages of fermentation, pH dropped rapidly, which was stabilized in the later stages. Compared to corn and sorghum-sudangrass hybrid, the concentration of ammonia-nitrogen was greater in proso millet. The count of lactic acid bacteria reached the maximum level on day 10, with the values of 6.96, 7.77, and 6.95 Log₁₀ CFU/g fresh weight for proso millet, corn, and sorghum-sudangrass hybrid, respectively. As ensiling progressed, the concentrations of lactic acid and acetic acid of the three crops increased and lactic acid proportion became higher in the order of sorghum-sudangrass hybrid, corn, and proso millet. Overall, the shorter, fast-growing proso millet comparing with corn and sorghum-sudangrass hybrid makes this forage crop an alternative option, particularly in areas where agricultural inputs are limited. However, additional research is needed to evaluate the efficacy of viable strategies such as chemical additives or microbial inoculants to minimize ammonia-nitrogen formation and DM loss during ensiling.

• 한국초지조사료학회지
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• 제30권1호
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• pp.9-14
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• 2010

본 시험은 논에서 벼 대체 여름 사료작물인 수수류를 논 재배하여 생육특성과 수량에서 우수한 품종을 선발할 목적으로 2008년부터 2009년까지 2년간에 걸쳐 충남 천안 농가 포장에서 수행하였다. 도입품종인 수수류 10품종 중에서 'Sordan79'는 습해에 비교적 강하고 2차 재생이 잘되며 당도가 높고 병해와 충해에 강한 생육특성을 보였고 수량 측면에서도 생초수량이 ha당 92,492 kg, 건물수량이 21,090 kg으로 가장 우수한 품종이었다. 따라서 본 연구결과를 토대로 볼 때 중부지역에서 벼 대체 사료작물인 수수류를 논에 재배 할때는 배수가 양호한 논의 선정이 필요하고 수수류 품종 중에서는 'Sordan79'를 재배하는 것이 적응성이나 생산성 측면에서 가장 유리하다고 할 수 있다.

• 한국작물학회지
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• 제39권6호
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• pp.585-593
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• 1994

사양토와 식양토 두 토성에 대하여 각각 25, 35, 50, 70, 100cm의 지하수위가 조절가능한 시험구에서 토성 및 지하수위가 우리나라에서 주로 이용되는 두가지 청예사료작물인 옥수수와 수수-수단그라스 잡종의 생육에 미치는 영향을 알아보고 작물별 적정지하수위를 알아보기 위하여 1993년에 수행되었다. 그 결과를 요약하면 다음과 같다 1. 두 작물 모두 사양토에서 우수한 생육을 보였으며 옥수수는 사양토의 지하수위 100cm에서 가장 우수한 생육을 보였으며 수수-수단그라스 잡종은 사양토 지하수위 70cm에서 가장 우수한 성적을 나타내었다. 2. 수수-수단그라스 잡종이 토성차이 및 지하수위 차이에 따른 생육의 변이가 적어서 옥수수에 비해 적응성이 높은 것으로 판단되었다. 3. 옥수수와 수수-수단그라스 잡종의 뿌리 해부구조 관찰결과 토성 및 지하수위에 따른 일정한 경향을 찾아내기는 어려웠으며 옥수수에서 피층조직이 파괴된 경우가 더 많았고 부위별로는 중간부분과 끝부분에서 피층조직이 파괴된 경우가 더 많았다.

• Journal of Animal Science and Technology
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• 제65권4호
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• pp.792-803
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• 2023

This study aimed to assess the impact of weather events on the sorghum-sudangrass hybrid (Sorghum bicolor L.) cultivar production trend in the central inland region of Korea during the monsoon season, using time series analysis. The sorghum-sudangrass production data collected between 1988 and 2013 were compiled along with the production year's weather data. The growing degree days (GDD), accumulated rainfall, and sunshine duration were used to assess their impacts on forage production (kg/ha) trend. Conversely, GDD and accumulated rainfall had positive and negative effects on the trend of forage production, respectively. Meanwhile, weather events such as heavy rainfall and typhoon were also collected based on weather warnings as weather events in the Korean monsoon season. The impact of weather events did not affect forage production, even with the increasing frequency and intensity of heavy rainfall. Therefore, the trend of forage production for the sorghum-sudangrass hybrid was forecasted to slightly increase until 2045. The predicted forage production in 2045 will be 14,926 ± 6,657 kg/ha. It is likely that the damage by heavy rainfall and typhoons can be reduced through more frequent harvest against short-term single damage and a deeper extension of the root system against soil erosion and lodging. Therefore, in an environment that is rapidly changing due to climate change and extreme/abnormal weather, the cultivation of the sorghum-sudangrass hybrid would be advantageous in securing stable and robust forage production. Through this study, we propose the cultivation of sorghum-sudangrass hybrid as one of the alternative summer forage options to achieve stable forage production during the dynamically changing monsoon, in spite of rather lower nutrient value than that of maize (Zea mays L.).

• Reproductive and Developmental Biology
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• 제34권3호
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• pp.213-216
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• 2010

This study was carried out between November 2008 and October 2009 in the experimental farm of Chunnam National University to investigate the effect of feeding of Sudangrass silage on the reproductive performance of Hanwoo cows. Two diets, rice straw or Sudangrass silage separately from concentrate were fed 19 Hanwoo cows. In control group (=CON), cows (n=9) were fed 5 kg (/head) rice straw and 3 kg (/head) commercial diet. In Sudangrass silage group (=SGS), cows (n=10) were fed 12.5 kg (/head) Sudangrass silage and 1 kg (/head) commercial diet. 1. Days to post-partum insemination were $78.8{\pm}25.3$ days for CON and $84.7{\pm}24.6$ days for SGS group and days to post-partum conception in CON or SGS were $90.1{\pm}24.1$ and $87.7{\pm}26.8$ days, respectively. 2. Post-partum conception rates for first service in CON or SGS was 66.7% and 90.0%, respectively, and caving interval was $375.1{\pm}46.7$ days for CON and $370.2{\pm}34.4$ days for SGS group. 3. Body Condition Scores of Hanwoo cows at artificial insemination was 5.36 for CON group and 4.93 for SGS group.

• Animal Bioscience
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• 제34권1호
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• pp.56-65
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• 2021

Objective: This study was conducted to investigate the effects of molasses and Lactobacillus plantarum on the ensiling quality and in vitro rumen fermentation of sudangrass silage prepared with or without wilting. Methods: The ensiling experiment, measured with 3 replicates, was carried out according to a 2×4 (wilted stages×additives) factorial treatment structure. Dry matter of the fresh (210 g/kg fresh matter) or wilted (305 g/kg fresh matter) sudangrass were ensiled (packed into 5.0-L plastic jars) without additive (control) or with molasses (M), Lactobacillus plantarum (LP), or molasses + Lactobacillus plantarum (M+LP). After 60 days of ensiling, the silages were analyzed for the chemical, fermentation, and in vitro characteristics. Results: After 60 days of ensiling, the fermentation parameters were affected by wilted, the additives and the interactions of wilted with the additives (p<0.05). The M+LP treatment at wilted had higher lactic acid levels and V-score (p<0.05) but lower pH values and butyric acid concentrations than the other treatments. In comparison with sudangrass before ensiling, after ensiling had lower dry matter and higher non-fibrous carbohydrate. The in vitro gas production, in vitro dry matter digestibility, in vitro crude protein digestibility, and in vitro acid fiber detergent digestibility changed under the effects of the additives. Significant interactions were observed between wilted and the additives in terms of in vitro gas production at 48 h, asymptotic gas production, gas production rate, half time, and the average gas production rate. The total volatile fatty acid levels in the additive treatments were higher than those in the control. Conclusion: Wilting and supplementation with molasses and Lactobacillus plantarum had the ability to improve the ensiling quality and in vitro nutrient digestibility of sudangrass silage. The M+LP treatment at wilted exhibited the strongest positive effects on silage quality and in vitro ruminal fermentation characteristics.