• Asian-Australasian Journal of Animal Sciences
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• 제31권8호
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• pp.1213-1220
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• 2018

Objective: An experiment was conducted to assess the antioxidant contents and activities of colored rice grains and to evaluate their nutritive characteristics in terms of chemical composition and in situ ruminal degradation. Methods: Ten cultivars of colored rice grains (Oryza sativa L.) collected from several areas of Japan were studied, and control rice without pigment, maize, barley, and wheat grains were used as control grains. Their chemical compositions, pigment, polyphenol contents, total antioxidant capacity (TAC), and degradation characteristics were determined. Results: The starch contents of the colored rice grains were in the range of 73.5% to 79.6%, similar to that of the control rice grain. The black and red rice grains contained anthocyanin (maximum: $5,045.6{\mu}g/g$) and proanthocyanidin (maximum: $3,060.6{\mu}g/g$) at high concentrations as their principal pigments, respectively. There were significantly (p<0.05) positive relationships among the pigment contents, polyphenol content, and TAC values in the colored and control rice grains, indicating that the increase in pigment contents also contributed to the increased polyphenol content and TAC values in the colored rice grains. The dry matter and starch degradation characteristics, as represented by c (fractional degradation rate of slowly degradable fraction) and by the effective degradability, of the colored rice grains and the control rice grain were ranked as follows among commonly used grains: wheat>barley${\geq}rice$>maize. The colored rice grains also included the most-digestible starch, since their potential degradable fraction and actual degradability at 48 h incubation were almost 100%. Conclusion: Colored rice grains have high potential to be used as antioxidant sources in addition to starch sources in ruminants.

• 한국가금학회지
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• 제43권2호
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• pp.55-61
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• 2016

With the aim of investigating the differences in the quality traits of breast meat between spent hen and broiler chicken, the physicochemical characteristics, fatty acid profile and sensory attributes of breast meat from the two chicken types were assessed. A higher protein content and a lower moisture content were found in breast of spent hen compared to that of commercial broilers (P<0.05). No significant differences in crude fat and ash contents were detected between commercial broilers and the older spent hens (P>0.05). Spent hens showed a significantly lower pH value than did commercial broilers. Spent hen meat had a higher $L^*$ value than broiler chicken meat did (P<0.05). However, $a^*$ and $b^*$ values of breast meat were similar between spent hens and commercial broilers. Water holding capacity values measured in the breast meat were comparable between the two types of chicken used in this study (P>0.05). However, spent hen meat showed a higher cooking loss value than did broiler meat (P<0.05). Total polyunsaturated fatty acid content was significantly higher in spent hen meat compared to broiler meat, in particular eicosapentaenoic acid and docosahexaenoic acid. Nevertheless, sensory characteristics of breast meat were comparable between spent hen and broiler chicken. This information can help consumers to understand better the nutritive value and important quality traits of breast meat from commercial broilers and spent hens.

• Asian-Australasian Journal of Animal Sciences
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• 제32권2호
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• pp.224-232
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• 2019

Objective: Apart from various climatic differences, corn harvest stage and varieties are two major factors that can influence the yield and quality of corn silage in the tropics. A study was conducted to determine the optimum harvest stage of four corn varieties for silage production in Malaysia. Methods: Corn was harvested at four growth stages; silking, milk, dough, and dent stages from four varieties; Sweet Corn hybrid 926, Suwan, breeding test line (BTL) 1 and BTL 2. Using a split plot design, the treatments were then analysed based on the plant growth performance, yield, nutritive and feeding values followed by a financial feasibility study for potential commercialization. Results: Significant differences and interactions were detected across the parameters suggesting varying responses among the varieties towards the harvest stages. Sweet Corn was best harvested early in the dough stage due to high dry matter (DM) yield, digestible nutrient, and energy content with low fibre portion. Suwan was recommended to be harvested at the dent stage when it gave the highest DM yield with optimum digestible nutrient and energy content with low acid detergent fibre. BTL 1 and BTL 2 varieties can either be harvested at dough or dent stages as the crude protein, crude fibre, DM yield, DM content, digestible nutrient and energy were not significantly different at either stage. Further financial analysis showed that only Sweet Corn production was not financially feasible while Suwan had the best financial appraisal values among the grain varieties. Conclusion: In conclusion, only the grain varieties tested had the potential for silage making according to their optimum harvest stage but Suwan is highly recommended for commercialization as it was the most profitable.

• Asian-Australasian Journal of Animal Sciences
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• 제24권6호
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• pp.781-790
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• 2011

The effects of seedtime and maturity stage on nutritive value of five maize stover varieties, including conventional maize (Kexiangyu 11, CM), fodder maize (Huqing 1, FM), high oil maize (Gaoyou 115, HOM), sweet maize (Kexiangtianyu 1, SM) and waxy maize (Kexiangluoyu 1, WM), were examined based on chemical composition, in vitro gas production and in situ incubation techniques. Maize stover was sampled at d 17 and d 30 after tasseling, and designated as maturity stage 1 and stage 2, respectively. The average dry matter (DM) organic matter (OM), crude protein (CP) and fiber contents were the greatest for HOM, SM and FM, respectively. CM had the highest in vitro organic matter disappearance (IVOMD) and volatile fatty acid (VFA) concentration. The highest ammonia nitrogen ($NH_3$-N) concentration in the incubation solution, and effective degradability of DM ($ED_{DM}$) and neutral detergent fiber ($ED_{NDF}$) were observed in SM. Advanced maturity stage increased (p<0.05) DM content, $ED_{DM}$ and $ED_{NDF}$, but decreased (p<0.05) OM and CP contents, and decreased (p<0.05) b and a+b values, IVOMD and molar proportion of valerate in the incubation solution for maize stover. Maize sown in summer had greater (p<0.05) OM content, but lower DM, CP, neutral detergent fiber (NDF) and acid detergent fiber (ADF) content compared with maize sown in spring. Maize sown in summer had greater (p<0.001) IVOMD, $NH_3$-N concentration in the incubation solution and $ED_{NDF}$, but lower (p<0.01) ratio of acetate to propionate compared to maize sown in spring. The interaction effect of variety${\times}$seedtime was observed running through almost all chemical composition, in vitro gas production parameters and in situ DM and NDF degradability. The overall results suggested that SM had the highest nutrient quality, and also indicated the possibility of selecting maize variety and seedtime for the utilization of maize stover in ruminants.

• Asian-Australasian Journal of Animal Sciences
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• 제14권7호
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• pp.986-993
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• 2001

In balance experiments with rats either 25 or 50% of the casein protein in the control diet was replaced with one of the following eight sun-dried tropical biomass products: water spinach plants (WS) (Ipomoea aquatica Forsk), leucaena leaves (LL) (Leuceana leucocephala), duckweed plants (DW) (Lemma minor L.), groundnut foliage (OF) (Arachis hypogaea L.), trichantera leaves (Tric) (Trichantera gigantea), indicago leaves (Ind) (Indigofera hirsuta), mungbean foliage (Mb) (Phaseolus aureus), and cassava leaves (CL) (Manihot esculenta Crantz). The experiment included 102 rats with six individuals per treatment group. In three of the 16 biomass treatment groups, feed intake and weight gain of the rats were unacceptably low, and therefore they were excluded from the statistical evaluation, The crude protein (CP) content of the biomass products varied between 20.9% (Tric) and 33.2% (DW), whereas the content of NDF varied between 18.5% (Ind) and 32.2% (DW) of dry matter (DM). The total content of essential amino acids (g/16 g N) was comparable with that of alfalfa meal, except for GF and Tric, which were inferior. Between plant species, differences in dietary digestibility of organic matter (dOM) and CP (dCP) were observed (p<0.001). Also, the replacement level negatively influenced dOM and dCP (p<0.001). The lowest values for dOM (p<0.001) were observed for diets including biomass products with the highest content of NDF (OF, Tric, Mb, LL). Digestibility of CP was negatively affected by level of protein replacement. Significant (p<0.001) differences were found in N-retention and biological value among diets with different biomass products. The most favourable overall results were obtained for DW, WS and CL. The main factors affecting the nutritive value of the diets tested were their NDF content, dCP and AA profile of the biomass. Also antinutritive component(s) may have influenced the process of digestion and metabolism of some of the biomass products.

• 한국초지조사료학회지
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• 제35권2호
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• pp.159-165
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• 2015

본 연구는 충남 천안 국립축산과학원 식용벼 재배지에서 2012년부터 2013년까지 정상적으로 벼 재배가 이루어지고 수확이 완료된 볏짚을 이용하여 수행하였다. 젖산균 접종 유무에 따라 볏짚사일리지의 사료가치 변화는 나타나지 않았으나 클로렐라 처리구는 대조구에 비해 현저하게 조단백질 함량이 증가하였다(p<0.05). 그리고 클로렐라 농도의 증가에 따라 조단백질 함량이 증가하는 경향을 보였다 (p<0.05). 모든 처리구에서 섬유소와 TDN 함량 및 in vitro 소화율은 차이를 나타내지 않았다. 그리고 젖산균 접종 유무에 따라 볏짚사일리지의 pH 및 유기산 함량 변화는 나타나지 않았으며 클로렐라 처리구도 무처리구에 비해 pH 변화는 나타나지 않았다. 그러나 클로렐라 처리구에서 젖산함량은 무처리구에 비해 유의적으로 증가하였으며 클로렐라 농도의 증가에 따라 젖산함량이 증가하는 경향을 보였다(p<0.05). 젖산균 단독접종구의 젖산균 수는 무처리구에 비해 현저하게 증가하였으며(p<0.05), 클로렐라 농도의 증가에 따라 증가하는 경향을 보였다(p<0.05). 그러나 효모와 곰팡이 수는 비슷한 수준을 나타냈다. 그러므로 볏짚사일리지의 사료가치와 품질은 클로렐라 첨가에 의해서 향상될 수 있다.

• 한국작물학회지
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• 제47권3호
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• pp.147-150
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• 2002

땅콩 수확시기 및 첨가제에 따른 땅콩경엽의 수량 및 사일리지용 사료가치를 비교 조사하였던 바 그 결과를 요약하면 다음과 같다. 1. 수확시기별 생육은 개화후 90일 수확시 경엽의 병해(갈색무늬병 및 흑색무늬병) 발생 정도가 낮고, 성숙협비율은 89%, 100립중은 81g으로 높았다. 2. 수확시기에 따른 경엽 및 종실 생산성은 개화후 90일에 경엽은 52 t/ha, 종실중은 3.6 t/ha이었다. 3. 경엽과 종실수량간에는 고도의 정상관($r^2$=0.62$^{**}$ )이 있었다. 4. 땅콩경엽의 사일리지 사료가치는 땅콩경엽+볏짚+젖산균 조제시 ADF 42.2%, NDF 49.6%, CP 10.5%, TDN 55.6%이었다. 5. 땅콩경엽 사일리지의 유기산함량은 땅콩경엽+볏짚 및 땅콩경엽+보릿짚에다 젖산균 첨가시 각각 산도 5.04 및 5.10, 낙산함량 3.12% 및 4.64%, 젖산함량은 7.34% 및 2.07%이었다.

• Asian-Australasian Journal of Animal Sciences
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• 제19권12호
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• pp.1722-1727
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• 2006

The nutritive value of 4 straws, obtained after thrashing of seeds from fodder crops, was assessed as complete feed for ruminants. Sixteen male Murrah buffaloes (liveweight 365.8${\pm}$19.5 kg), were divided into 4 equal groups and offered ad lib. straw of either Trifolium resupinatum, Trifolium alexandrium, Medicago sativa or Lolium perenne, supplemented with minerals and vitamin A, for 40 days in a completely randomized design. Simultaneously, each straw was offered to 3 rumen fistulated male buffaloes in order to assess the biochemical changes in the rumen. Compared to other straws M. sativa straw had higher (p<0.05) organic matter (OM), crude protein (CP), acid-detergent fiber (ADF) and cellulose content. L .perenne had the highest (p<0.05) hemicellulose and lowest (p<0.05) CP and acid-detergent lignin (ADL) content. T. resupinatum had the lowest concentration of cell wall constituents (CWC). The digestibility of nutrients of T. resupinatum and L. perenne straw was similar, but higher (p<0.05) than that of other straws. M.sativa straw showed highest (p<0.05) digestibility of CP. The highest OM digestibility of T. resupinatum and CP digestibility of M. sativa were responsible for highest (p<0.05) total volatile fatty acids and trichloroacetic acid precipitable nitrogen in the strained rumen liquor. The digestible crude protein (DCP) was highest (p<0.05) in M. sativa followed by that in T. alexandrium. The total purine derivatives excreted in urine varied from 0.22-0.32 mmol/kg $W^{.75}/d$. The efficiency of microbial protein synthesis indicated that OM of straws of M. sativa and that of T. alexandrium was used more (p<0.05) efficiently. The microbial protein synthesized was highest in T. resupinatum, but statistically similar to other groups. The values for N-retention and apparent biological value were highest for L. perenne, though comparable with that of M. sativa and T. alexandrium. The available metabolizable energy (ME) was highest (p<0.05) in T. resupinatum followed by that in L. perenne and lowest in M. sativa. It was concluded that all the straws, supplemented with minerals and vitamin A, could be fed exclusively to adult ruminants with no adverse affect, as animals were able to maintain body weight (372${\pm}$20.1 kg).

• 한국초지조사료학회지
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• 제32권2호
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• pp.93-100
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• 2012

본 연구에서는 간척 논에서 재배된 벼의 백수를 조사료 자원으로 활용하기 위한 기초자료를 제공하기 위해 백수 벼의 아미노산 조성을 조사하였다. 본 연구에 분석된 벼 시료는 전남 신안군 비금도 벼 백수 피해가 일어난 약1,000 ha의 벼에서 채취하였다. 총체 벼의 조단백질 함량은 엽 > 알곡 > 잎집 > 줄기 순으로 나타났으며, 백수정도에 따른 총 아미노산 함량은 가장 심한지역>중간지역>정상생육 지역 순으로 나타났다. 그리고 심한지역, 중간지역 및 정상생육지역 모두 엽, 알곡, 잎집 및 줄기 내 아미노산은 glutamic acid가 가장 높은 함량을 보였으며 methionine이 가장 낮은 함량을 보였다. 따라서 벼 백수 피해가 일어난 지역의 벼와 정상생육이 진행된 벼의 아미노산 함량은 비슷한 수준을 보였지만 벼 백수피해 정도에 따라 조사료원으로써 영양적인 가치가 차이가 있을 것으로 보여지기 때문에 조사료의 영양적 측면에 관한 연구가 추가적으로 진행되어야 한다.

• Journal of Animal Science and Technology
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• 제45권1호
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• pp.87-100
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• 2003

본 연구는 육계분 혐기 또는 퇴적 발효사료 제조 시의 적정 당밀 첨가 수준을 도출하고, 발효 전 후의 영양적 및 발효 성상의 변화를 구명하고, 펠렛 처리 효과를 평가하며, 그리고 기존의 한우 사양 체계에서의 당밀 또는 펠렛 처리된 육계분 발효사료 급여 시 한우에 의한 기호성 개선 통한 적응기간 단축 효과를 평가하고자 실시되었다. 육계분의 혐기발효 시 경제적이고도 효과적으로 혐기발효를 일으키는 당밀 적정 첨가 수준은 5%인 것으로 사료되었다. 육계분의 혐기 또는 퇴적발효 시 당밀 5% 첨가는 발효 성상을 향상시키나(P<0.05), 화학적 성분과 in vitro 영양소 소화율에는 현저한 영향을 미치지 않았다. 육계분 퇴적발효사료의 펠렛화는 밀도(중량/부피)를 3배정도 증가시키고, 수분을 현저히(P<0.05) 증발시켰으나, 약간의 유기물 감소(P<0.05) 현상을 보였다. 육계분 발효사료를 펠렛 처리 또는 당밀 첨가는 한우에 의한 기호성을 뚜렷하게 향상시켰으며, 결과적으로 한우의 이들 사료에 대한 적응기간을 반 정도(8-9일)로 단축시켰다. 종합적으로 육계분 발효사료 제조 시 당밀 첨가 또는 펠렛 처리는 사료영양적 가치를 유지하면서 적응기간동안의 한우 기호성을 현저하게 개선시키는 효과가 있었다.