The present study was conducted to analyze agronomic characteristics of 8 ecotypes of Arundinella hirta (A. hirta) and the correlation among them. Changes in phenotypic characteristics of 8 ecotypes were measured at equal intervals of time from May to September. Among ecotypes, Jangsoo-1 has the highest plant height (172.33 cm), number of leaves (9.00) and leaf length (55 cm) while the ecotype Youngduk has the highest leaf width (1.57 cm), fresh mass (26.63 g), dry mass (7.06 g), number of spikelets per spike (53.33), amount of seeds per spike (0.74 g) and amount of seeds per 10 spikes (7.23 g). The ecotype Jinju-1 has the shortest plant height (119 cm) and leaf number (6.33), while Okgye-2 has shortest leaf length (30.67 cm), leaf width (0.93 cm), fresh mass (12.60 g), dry mass (3.30 g), spike length (30.33 cm), spikelet per spike (39.67), amount of seeds per spike (0.61 g) and amount of seeds per 10 spikes (6.00 g). Correlation coefficients were estimated among the studied agronomic characteristics which showed positive and significant association with each other. In the present study, the agronomic data collected would be useful to understand the potential of A. hirta as a forage resource and helpful in selecting the high-yielding genetic resource for future forage improvement.

본 실험은 논 토양에서 호밀 재배시 화학비료와 발효 돈분 액 비 혼용 시용이 생육특성 및 영양성분에 미치는 영향을 조사하고 자 실시하였다. 실험설계는 화학비료 100% 처리구(C), 화학비료 70% +돈분액비 30% 처리구(T1), 화학비료 50% +돈분액비 50%처리구(T2), 화학비료 30% +돈분액비 70% 처리구(T3) 그리고 돈분액비 100% 처리구(T4)로 한, 5처리 3반복 난괴법으로 배치 하였다. 이때 돈분 액비 시용은 질소량만을 기준으로 하였다. 초 장은 처리구들 간에 유의적인 차이를 보이지 않았다. 이삭길이, 엽장 및 엽폭은 각각 C, T3 및 T2구에서 각각 높게 나타났다 (p<0.05). 경의 굵기는 T4 > T3 > T2 > T1 > C구 순으로 돈분 액비 시용량이 높을수록 높게 나타났다(p<0.05). 건물수량 및 TDN 수량은 T4구가 가장 높게 나타난 반면 C구가 가장 낮게 나 타났다(p<0.05). 조단백질, NDF, ADF 및 조섬유 함량에서는 처 리구들 간에 유의적인 차이는 나타나지 않았다. 그러나 조지방 및 조회분 함량에 있어서는 각각 T2 및 T3구에서 높게 나타났다 (p<0.05). 총무기물 함량은 돈분액비 시용 비율이 증가할수록 유 의적으로 감소하였다(p<0.05). 그러나 총 유리당 함량은 돈분액 비 시용 비율이 높았던 T3 및 T4구가 높게 나타난 반면 화학비료 처리구(C) 및 돈분액비 시용 비율이 낮은 구(T1)에서는 낮게 나 타났다(p<0.05). 이상의 결과를 종합해 볼 때, 수량성(건물수량, TDN수량)과 사일리지 품질에 영향을 미치는 유리당을 고려한다 면 화학비료와 돈분액비 혼용하거나 돈분액비를 시용하는 것도 효과적이라고 사료된다.

The planting date of corn for silage has been delayed because of spring drought and double cropping system in Korea. This experiment was conducted to evaluate agronomic characteristics, forage production and feed value of corn at April and May in 2019. Experimental design was a split-plot with three replications. Planting dates (12 April and 10 May) were designated to the main plot, and corn hybrids (‘P0928’, ‘P1543’ and ‘P2088’) to the subplot. The silking days of the early planting date (12 April) was 79 days and that of the late planting date (10 May) was 66 days (p<0.0001), however, there were no significant differences among the corn hybrids. Ear height of the late planting date was higher than that of the early planting (p<0.05), while there were no significant differences in plant height of corn. Insect resistance at the early planting was lower than that of late planting (p<0.05), however, lodging resistance was no significant difference at planting date. The rice black streaked virus (RBSDV) infection of early planting was 3.7% and that of late planting was 0.3% (p<0.001). Dry matter (DM) contents of stover, ear and whole plant had significant difference at planting date (p<0.05). And differences in ear percentages were observed among the corn hybrids (p<0.01). And ear percentages of early maturing corn (‘P0928’) was higher than for other hybrids. Ear percentage at the early planting date was higher than that at the late planting date (p<0.01). DM and total digestible nutrients (TDN) yields had significant difference at planting date, however, there were no significant differences among the corn hybrids. DM and TDN yields at the late planting (21,678 kg/ha and 14,878 kg/ha) were higher than those of the early planting (13,732 kg/ha and 9,830 kg/ha). Crude protein content at the early planting date was higher than that of the late planting. Acid detergent fiber content of the late planting was lower than that of the early planting date (p<0.01), while there were no significant neutral detergent fiber content difference among the corn tested. Calculated net energy for lactation (NEL) and TDN at the early planting were higher than those of at the late planting (p<0.01). Results of this our study indicate that the late planting date (May) is better than early planting date (April) in forage yield and feed value of corn. Therefore, the delay of planting date by May was more suitable for use in cropping system.

This study was conducted to compare the agronomic characteristics and productivity according to the species and varieties of winter forage crops in reclaimed land. Winter forage crops used in this study were developed in National Institute of Crop Science, RDA. Oats (‘Samhan’, ‘Jopung’, ‘Taehan’, ‘Dakyung’ and ‘Hi-early’), forage barley (‘Yeongyang’, ‘Yuyeon’, ‘Yujin’, ‘Dacheng’ and ‘Yeonho’), rye (‘Gogu’, ‘Jogreen’ and ‘Daegokgreen’) and triticale (‘Shinyoung’, ‘Saeyoung’, ‘Choyoung’, ‘Sinseong’, ‘Minpung’ and ‘Gwangyoung’) were planted in the reclaimed land of Sihwa district in Hwaseong, Gyeonggi-do in the autumn of 2018 and cultivated using each standard cultivation method, and harvested in May 2019(oat and rye: 8 May, barley and triticale: 20 May.) The emergency rate was the lowest in rye (84.4%), and forage barley, oat and triticale were in similar levels (92.8 to 98.8%). Triticale was the lowest (416 tiller/㎡) and oat was the highest (603 tiller/㎡) in tiller number. Rye was the earliest in the heading date (April 21), triticale was April 26, and oat and forage barley were in early May (May 2 and May 5). The plant height was the highest in rye (95.6 cm), and triticale and forage barley was similar (76.3 and 68.3cm) and oat was the lowest (54.2 cm). Dry matter(DM) content of rye was the highest in the average of 46.04% and the others were similar at 35.09∼37.54%. Productivity was different among species and varieties, with the highest dry matter yield of forage barley (4,344 kg/ha), oat was similar to barley, and rye and triticale were lowest. ‘Dakyoung’ and ‘Hi-early’ were higher in DM yield (4,283 and 5,490 kg/ha), and forage barley were higher in ‘Yeonho’, ‘Yujin’ and ‘Dacheng’ varieties (4,888, 5,433 and 5,582 kg/ha). Crude protein content of oat (6.58%) tended to be the highest, and TDN(total digectible nutrient) content (63.61%) was higher than other varieties. In the RFV(relative feed value), oats averaged 119, while the other three species averaged 92∼ 105. The weight of 1,000 grain was the highest in triticale (43.03 g) and the lowest in rye (31.61 g). In the evaluation of germination rate according to the salt concentration (salinity), the germination rate was maintained at about 80% from 0.2 to 0.4% salinity. The correlation coefficient between germination and salt concentration was high in oat and barley (-0.91 and -0.92) and lowest in rye (-0.66). In conclusion, forage barley and oats showed good productivity in reclaimed land. Adaptability is also different among varieties of forage crops. When growing forage crops in reclaimed land, the selection of highly adaptable species and varieties was recommended.

This study was carried out to investigate the growth characteristics, yield and feed value of Sorghum×Sudangrass hybrid for silage according to the drainage depths in the paddy field of lowland. The experimental design was arranged in a randomized block design with four treatments and three replication. The drainage depths of four treatments were 0cm, 20cm, 40cm and 60cm, respectively. Plant length, leaf length and leaf number were not significantly different, but leaf width increased as the higher the drainage depth(p<0.05). The number of dead leaf was higher in the order of 60cm > 0cm ≥ 40cm ≥ 20cm treatment(p<0.05). Green degree was higher in the order of 20cm > 40cm > 0cm > 60cm treatment(p<0.05). Stem diameter and stem hardness increased significantly as drainage depth increased from 0cm to 60cm(p<0.05). Also, fresh yield, dry matter yield and TDN yield increased as the higher the drainage depth(p<0.05). Crude protein and TDN content were the highest in 40cm treatment(p<0.05). Crude ash was higher in the order of 20cm > 40cm > 0cm > 60cm treatment(p<0.05). ADF and NDF content were the highest in 0cm treatment(p<0.05). Total mineral content was higher in the order of 20cm > 0cm > 40cm > 60cm(p<0.05). Free sugar content(fructose, glucose and sucrose) was the highest in 0cm treatment(p<0.05). Total amino acid(EAA+NEAA) was higher in 40cm than the other treatments(p<0.05). There is a difference in the content of ingredients(crude protein, TDN, mineral, free sugar and amino acid) according to the treatments. But considering dry matter yield and TDN yield, Sorghum×Sudangrass hybrid cultivation is advantageous to set the drainage depth of about 60cm in the paddy field of lowland.

This study was carried out from 2015 to 2016 to identify the suitable sowing and harvesting dates of summer crops in the mountain of Yeongnam, South Korea. The experimental design consisted of the different sowing and harvesting dates as follows: corn hybrid (Z. mays, Kwangpyeongok) of sowing (May 8, 19, and 27) and harvesting (August 10, 20, and 30); sorghum×sorghum hybrid (Sorghum bicolor x Sorghum bicolor, SS405) of sowing (May 27, June 19 and June 27) and harvesting (August 10, 20, and 30). In corn hybrid, ear rate and dry matter (DM) yield decreased (p<0.05) with the postponement of sowing date. Otherwise, ear rate and DM yield increased (p<0.05) with the postponement of harvesting date. Crude protein content decreased (p<0.05) with the postponement of sowing date, but neutral detergent fiber content increased (p<0.05). In sorghum×sorghum hybrid, plant length and DM yield with the postponement of harvesting date increased (p<0.05), while crude protein content with the postponement of harvesting date decreased (p<0.05). This study concluded that sowing corn hybrid in early May and sorghum×sorghum hybrid in early June then harvest in the middle of August was recommend to increase dry matter yield and feed value.

In this experiment comparison was made for the agronomic characteristics and quality of forage rye among the different growing stages. Rye was harvested every 5 days, then separated into three parts and determined the quality. Before harvesting, plant height and yield were recorded. Dry matter yield increased continuously, while fresh matter yield decreased after heading. ADF and NDF value increased before blooming and then showed a slight fluctuate. In addition, highest CP content appeared on jointing stage. TDN and RFV went down until blooming stage and then showed a steady trend. So the proper harvest time is from heading to blooming stage for forage rye.

This study was conducted to evaluate on agronomic characteristics, forage quality and dry matter (DM) yields of mugwort (Artemisia princeps Pamp.) collected different region at Seongju in Kyeongbuk from 2014 to 2015. The experiment was arranged in randomized complete block design with three replications. Mugwort was planted on 17th March, 2014 and harvested on 13th September, 2014 and on 25th May and 9th September, 2015. DM yields of Dalsung(1), Seongju B.(1), Dalsung(2) and Sajuarissuk were 17.3, 16.8, 16.7 and 16.7(MT ha⁻¹), respectively and the DM yields of those were higher (P<0.05) than the other mugworts in 2014. In 2015, DM yields of Dalsung(1), Dalsung(2), Seongju B.(1), and Sajuarissuk were 19.5, 19.3, 18.4 and 18.4(MT ha⁻¹), respectively and DM yields of those were higher (P<0.05) than the others. DDM(digestable dry matter) content of mugworts was a range of 56.4 to 60.8% and that of Sajabalssuk, 60.8% was the highest. Seongju B.(1) 58.8% was higher than Seongju B.(2) 56.4% but there were no difference among the Dalsung(1) 58.4%, Dalsung(2) 58.1%, Sajuarissuk 57.7% and Yeongcheon. The result of this study indicated that Dalsung(1), Dalsung(2), Sajuarissuk and Seongju B.(1) would be recommendable for forage production.

This study was carried out to introduce of agronomic characteristics, forage yields and quality of Sorghum × Sudangrass hybrids ‘Cadan 99B’ and ‘Sweet Sioux WMR’ from 2015 to 2016 in middle and southern regions of Korea. The field experiment design was complete in seven varieties with three repetitions. Sorghum × Sudangrass hybrids were sown on mid-May in middle region, and end-May in southern region of Korea, in 2015 and 2016. The observed average heading date of Cadan 99B and Sweet Sioux WMR were July 22. The heading dates of Cadan 99B and Sweet Sioux WMR were 8 days earlier than SX-17 and 5 days earlier than brown mid-rid (BMR) Revolution. The sugar contents of Cadan 99B and Sweet Sioux WMR were 6.5 and 6.9 Brix°, respectively. Comparison with BMR variety, the sugar contents of Candan 99B and Sweet Sioux WMR were 0.2 and 0.6 Brix° higher than Revolution, respectively. The average of dry matter (DM) yield for 2 years and 2 regions of Cadan 99B (24,587kg/ha) were the highest among the seven varieties, but there was no significant difference among other varieties except headless control variety Jumbo (19,119kg/ha) and LATTE (20,778kg/ha) (p>0.05). The crude protein (CP) and in vitro dry matter digestibility (IVDMD) of Cadan 99B were 7.5% and 60.2%, and Sweet Sioux WMR were 6.9% and 60.7%, respectively. The results of this study indicated that Sorghum × Sudangrass hybrids Cadan 99B and Sweet Sioux WMR are earlier heading dates and higher than SX-17, and high yields of DM in middle and southern regions of Korea.

본 시험은 2013년부터 2014년까지 전국 3개 지역 (전남 구례, 경북 상주 및 충남 천안)에서 이탈리안 라이그라스 품종의 생육특성과 사초생산성을 평가하였다. 시험설계는 품종을 처리로 하여 7개 품종을 3반복의 난괴법 배치로 하 였다. 품종은 ‘코윈어리’, ‘플로리다 80’, ‘연봉1호’, ‘연봉2 호’, ‘연봉3호’, ‘계명1호’, 및 ‘계명2호’ 공시하였다. 이탈리 안 라이그라스의 파종의 경우 전남 구례는 2013년 10월 4 일, 경북 상주는 10월 8일, 충남 천안은 10월 3일 파종하 였다. 한편 수확시기는 품종의 평균 출수기로 전남 구례와 경북 상주는 2014년 4월 26일에 수확하였으며, 충남 천안 은 4월 24일에 수확하였다. 공시한 7품종은 내병성, 내충성 및 내한성은 품종간에 차이가 없었으나 내도복성은 공시품 종 모두 약하였다. 전국 3개 지역에서 ‘연봉1호’, ‘연봉2호’ 및 ‘계명1호’의 출수기가 다른 품종보다 빨랐다. 출수기가 빠른 조생종 이탈리안 라이그라스는 건물률이 높고 초장도 다른 품종보다 높았다. 또한 조생종은 생초수량과 건물수 량도 다른 품종보다 많았다. 본 시험결과를 볼 때 숙기가 빠른 품종은 다른 품종에 비하여 초장이 높고, 건물률, 생 초수량 및 건물수량이 많은 것으로 평가되었다. 따라서 숙기가 빠르고 사초 생산성이 우수한 조생종 이탈리안 라이 그라스가 2모작체계에 유리할 것으로 판단된다.

본 실험은 논 토양에서 사일리지용 수수 × 수수 교잡종 재배시 화학비료와 발효 돈분 액비 혼용 시용이 생육특성 및 영양성분에 미치는 영향을 조사하고자 실시하였다. 실 험설계는 화학비료 100% 처리구 (C), 화학비료 70% + 돈분 액비 30% 처리구 (T1), 화학비료 50% + 돈분액비 50% 처 리구 (T2), 화학비료 30% + 돈분액비 70% 처리구 (T3) 그리 고 돈분액비 100% 처리구 (T4)로 한, 5처리 3반복 난괴법 으로 배치하였다. 이때 돈분 액비 시용은 질소량만을 기준 으로 하였다 (150 kg/ha). 초장, 엽장, 엽폭 그리고 경의 굵 기는 T4구가 유의적으로 작게 나타났다 (p<0.05). 경의 경 도는 돈분액비 시용 비율 낮고 화학비료 시용 비율이 높을 수록 유의적으로 증가하였다 (p<0.05). 생초수량은 T2구가 높았던 반면 T3구가 낮게 나타났다 (p<0.05). 그러나 건물 수량 및 TDN 수량은 처리구들 간에 유의적인 차이를 보이 지 않았다. 조단백질 함량은 T1구가 다른 구에 비하여 높 게 나타났다 (p<0.05). 조지방 함량은 T1, T2, T3 그리고 T4 처리구들 간에는 유의적인 차이가 없었지만, C구와는 유의적인 차이를 보였다 (p<0.05). NDF와 조섬유 함량은 각각 T3구와 C구에서 높게 나타났다 (p<0.05). 그러나 ADF 함량은 처리구들 사이에 유의적인 차이를 보이지 않았다. 총무기물 함량은 T1 > T2 > T4 > T3 > C 구 순으로 높게 나 타났다 (p<0.05). 유리당 함량은 T1과 C구가 다른 처리구에 비하여 유의적으로 높게 나타났다 (p<0.05). 이상의 결과를 종합해 볼 때, 돈분액비 시용은 화학비료에 비하여 수량성, 영양성분에 크게 떨어지지 않기 때문에 사일지용 수수 × 수수 교잡종 재배시 돈분액비와 화학비료를 혼용 시용 하 거나 돈분액비 만 시용하여도 큰 무리가 없는 것으로 판단된다.

국내 벼 품종의 내냉성 증진을 위한 기초자료를 제공하고자2013년 한국의 고지대 진부시험지와 중국 운남성 고지대 마롱시험지의 벼 재배기간의 기상 분석과 우리 품종에 대한 생산력 검정을 실시한 결과는 다음과 같다. 벼 재배기간의 최고기온은 중국 마롱시험지 22.7 ~ 25.5oC로한국 진부시험지 23.9 ~ 28.8oC보다 낮았다. 평균기온은 중국마롱시험지에서는 20oC 범위에서 변화가 적은데, 한국 진부시험지에서는 13.0 ~ 24.3oC로 변화가 심하였다. 최저기온은 출수기와 등숙기인 7월과 8월에는 중국 마롱시험지가 한국 진부시험지보다 1 ~ 2oC 낮았다. 작물학적 특성을 보면 평균 출수일수는 중국 마롱시험지73.3일 한국 진부시험지 69.7일로 중국 마롱시험지에서 3.6일정도 길었고, 적산온도는 중국 마롱시험지 1,239.4oC로 한국진부시험지의 1,299.4oC보다 평균 60oC가 적었다. 간장은 진부와 마롱시험지에서 63 ~ 64 cm, 이삭길이는 18 ~ 19 cm로 각각 비슷하였다. 주당수수는 한국 진부시험지가 14개로 중국 마롱시험지보다 5개가 많은 반면, 수당입수는 중국 마롱시험지에서 102개로 한국 진부시험지에서 보다는 43개가 많았다. 내냉성과 관련된 임실율은 중국 마롱시험지에서 60.3% 한국 춘천 내냉성 검정시험지에서 65.7%를 보였다. 그중 철원87호와진부벼 품종은 진부시험지와 마롱시험지 모두에서 임실율이양호하였다. 현미 천립중은 중국 마롱시험지에서 25.5g인 반면 한국 진부시험지에서는 23.0 g으로 중국 마롱시험지에서 현미 천립중이 다소 무거운 편이었다. 등숙율은 중국 마롱시험지 55.7%로 한국 진부시험지 90.3%에 비하여 매우 낮은 편이었다. 쌀 수량은 한국 진부시험지의 평균 540 kg/10a에 비하여 중국 마롱시험지의 평균 278kg/10a으로 전반적으로 중국마롱시험지의 쌀 수량은 낮았다.

본 시험은 새로운 여름 사료작물인 케나프(kenaf; Hibiscus dannabinus L.)의 생육특성, 수량성 및 품질을 다른 사료작물과 비교할 목적으로 2013년부터 2014년까지 2년간에 걸쳐 축산과학원 축산자원개발부 초지사료과 내의 시험포장에서 수행하였다. 중부지역에서 케나프(홍마 300), 옥수수(광평옥) 및 수수×수단그라스(점보)의 생육특성 및 품질을 비교한 결과를 요약하면 다음과 같다. 당도는 홍마 300이 5.4 Brix°로 광평옥보다 1Brix°, 점보보다 2.9 Brix° 높았다. 출현율과 도복은 세 작물 모두 각각 80% 이상, 1.5 이상으로 양호하게 나타났다. 생초수량은 점보가 홍마 300보다 12% 높았으며, 건물중은 홍마 300이 제 작물 중 유의성 있게 가장 높게 나타났다(p<0.05). 하지만, TDN 수량은 홍마 300이 광평옥보다 13% 유의성 있게 낮았다(p<0.05). ADF 및 NDF 함량은 홍마 300이 57.8%, 69.5%로 가장 높았으며 TDN 함량 및 건물소화율은 43.3% 및 44.4%로 가장 낮았다. 따라서 본 연구결과를 토대로 볼 때 케나프인 홍마 300은 건물수량은 높지만 사료 품질에서 광평옥 및 점보보다 많이 낮았다. 그 결과 TDN 수량성은 광평옥보다 13% 낮은 결과를 얻었다. 이상의 결과를 종합하여 볼 때, 새로운 사료작물인 케나프는 단위면적당 생초 및 건물수확량은 옥수수보다 높지만, 건물소화율 및 TDN 함량이 낮아 TDN 수량은 옥수수보다 낮은 것으로 나타났다. 결과적으로 홍마 300은 높은 수량성을 가지고 있지만 낮은 사료가치를 가지고 있는 것으로 나타났다.

본 연구는 사일리지용 옥수수를 파종 한 후 배수로 깊이를 0 cm, 20 cm, 30 cm 그리고 50 cm로 처리하고 이에 따른 생육특성, 생산성 및 화학적 특성을 비교 검토하였다. 초장, 엽장, 엽폭, 착수고 및 하고엽은 배수로 깊이에 따라 유의적인 차이를 보이지 않았다. 알곡 충실도, 암이삭 길이 및 암이삭 둘레는 배수로 깊이가 깊을수록 유의적으로 커지는 것으로 나타났다(p<0.05). 그러나 경의 굵기 및 경경도는 처리구들 사이에 차이를 보이지 않았다. 당도에 있어서는 0 cm > 20 cm > 30 cm > 50 cm 구순으로 배수로 깊이가 낮을수록 높은 수치를 보였다(p<0.05). 생초수량, 건물수량 및 TDN 수량은 배수로 깊이가 깊을수록 증가하는 것으로 나타났다 (p<0.05). 조단백질함량은 50 cm구가 가장 높게 나타난 반면 0 cm 처리구가 가장 낮게 나타났다. 그러나 조지방, NDF, ADF 및 조섬유 함량은 처리구들간 유의적인 차이를 보이지 않았다. 조회분 함량은 50 cm 구에서 높게 나타났다(p<0.05). 총무기물함량은 0 cm (5,690.14) > 30 cm(5,397.02) > 20 cm (4,853.21) > 50 cm구(4,660.18 mg / 100 g) 순으로 높게 나타났다(p<0.05). 그리고 유리당 함량은 20 cm구에서 가장 높게 나타났다(p<0.05). 구성아미노산 함량은 50 cm구가 다른 처리구 보다 높게 나타났지만(p<0.05), 0 cm, 20 cm 및 30 cm 처리구 사이에는 유의적인 차가 없었다. 이상의 결과를 종합해 볼 때, 저지대 논 토양에서 수량을 확보하기 위해서는 최소한 배수로 깊이를 30 cm 이상을 확보 하는 것이 바람직한 것으로 판단된다.

본 시험은 2013년부터 2014년까지 경북 성주에서 여름 파종 수수류 교잡종의 생육특성, 품질 및 수량성을 평가하기 위하여 실시하였다. 시험설계로 품종을 처리로 한 6처리 3반복으로 배치하였다. 파종기는 2013년과 2014년 7월 31일에 조파하였고 수확은 2013년 11월 3일과 2014년 11월 5일에 하였다. 출수기는 2년 평균이 sordan79 10월 5일 sprint 10월 8일 SX17 10월 9일 순으로 조사되었고, 2013년 수수류 교잡종의 DM수량은 SX17, Sordan79 및 Sprint가 각각 24.2, 23.9 및 23.4톤/ha으로 SS405, PACF8350 및 Sugar grazer 21.5, 20.6 및 20.5톤/ha 보다 높았으며(p<0.05), DDM수량 역시 비슷한 경향을 보였다. 2014년 DM수량은 SX17, Sordan79 및 Sprint가 20.8, 19.3 및 20.0톤/ha로 다른 3품종 보다 높았으며(p<0.05), DDM수량 역시 비슷한 경향을 보였다. ADF와 NDF의 함량은 비교적 낮았으며 반면에 DDM 함량은 높아 사료가치가 우수하였다. 본 시험의 결과에 의하면 여름 파종 시 전통형(출수형) 수수-수단그라스 교잡종 SX17, Sordan79와 수단그라스－수단그라스 교잡종 Sprint가 늦은 개화형(비출수형) 수수－수단그라스 교잡종 PACF8350이나 수수－수수교잡종 SS405와 Sugar grazer 보다 수량측면에서 남부지방에서 유리할 것으로 생각된다.

This study was conducted to investigate the influence of the mixed application of chemical fertilizer (CF) and liquid swine manure (LSM) on the agronomic characteristics, dry matter yield, amino acids, minerals, and free sugars in cultivating Sorghum × Sudangrass hybrid (SSH) on paddy soil. The field experiment was designed in a randomized block design with three replications and consisted of CF 100% (C), CF 70% + LSM 30% (T1), CF 50% + LSM 50% (T2), CF 30% + LSM 70% (T3), and LSM 100% treatment (T4). The application of LSM was based solely on the nitrogen. Plant length, leaf length, leaf width and number of leaf were significantly higher in T4 (p<0.05), but stem diameter did not show significant differences among treatments. Stem hardness increased significantly (p<0.05) as the LSM application rate decreased, but sugar degree decreased significantly (p<0.05) as the LSM application rate decreased. Fresh yield, dry matter yield and TDN yield were the highest in T4, whereas the lowest in T2 (p<0.05). Crude protein, crude fat and crude ash were the highest in C, T4 and T2, respectively (p<0.05). However, NDF and ADF did not show significant difference among treatments. Crude fiber decreased significantly (p<0.05) as the LSM application rate increased. The total mineral content was decreased significantly (p<0.05) as the LSM application rate increased. Total amino acid content was higher in the order of T1> C> T3> T4> T2 (p<0.05). Free sugar content increased significantly (p<0.05) as the LSM application rate increased. The analysis of all the above results suggests that the application of liquid swine manure is very effective, considering the yield performance and the content of sugar degree and free sugar. In addition, liquid swine manure may be possible to grow Sorghum × Sudangrass hybrid without chemical fertilizer.