• Title, Summary, Keyword: TDN

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Effect of Tillage System and Fertilizer Type on the Forage Yield and Quality of Italian Ryegrass (경운방법 및 비료종류가 이탈리안 라이그라스의 사초수량 및 품질에 미치는 영향)

  • Kim, Jong-Duk;Abuel, Shwin J.;Jeon, Gyeong-Hyeop;Kwon, Chan-Ho
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.29 no.4
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    • pp.313-320
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    • 2009
  • This experiment was conducted to evaluate the effect of tillage system and fertilizer type on the forage yield and quality of Italian ryegrass. This experiment was a $2{\times}2$ factorial arrangement for two tillage systems (tillage and no-tillage) and two fertilizer type (chemical and manure compost). The plant height, dry matter (DM) content, DM yield, TDN (total digestible nutrients) yield, and CP (crude protein) yield have significant differences in tillage system of Italian ryegrass. Italian ryegrass cultivated with tillage (plow and rotary till) had lower plant height, DM yield, TDN yield and CP yield than no-tillage, while its DM content showed the opposite results. However, there were no significant differences in the results on fertilizer types. Neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents were significantly higher in no-tillage compared to tillage. However, there was no significant difference in CP content on tillage system. TDN and relative feed value (RFV) were higher in tillage than no-tillage system (p<0.01). The TDN content was lower when using manure as fertilizer. No significant effects were observed for NDF and RFV in fertilizer type of Italian ryegrass. Based on the results of this study, tillage system and fertilizer type affected forage quality as well as forage yield. Forage yield of no-tillage was higher compared to tillage.

Effect of Growth Stage and Variety on the Yield and Quality of Whole Crop Rice (생육시기 및 품종이 총체 벼의 수량 및 사료가치에 미치는 영향)

  • Kim, Jong-Geun;Chung, Eui-Soo;Ham, Jun-Sang;Seo, Sung;Kim, Meing-Joong;Yoon, Sei-Hyung;Lim, Young-Chul
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.27 no.1
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    • pp.1-8
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    • 2007
  • This experiment was conducted to determine the effect of growth stage and variety on the yield and quality of whole crop rice (WCR) at National Livestock Research Institute, RDA from 2003 to 2005. Two types of rice ("Chucheong" for food and "Hamasari" for feed) were harvested at six different growth stages (heading, flowering, milk, dough, yellow ripening and fully ripening stage). Crude protein content decreased with progressed maturity at harvest. As growth stage delayed, TDN (total digestible nutrient) content of all rice varieties increased. The average TDN content of two type of rice was about 60% (59.3) which was calculated from ADF(acid detergent fiber) content. The contents of ADF and NDF(neutral detergent fiber) decreased with harvest maturity. The highest DM(dry matter) yield was at the ripening stage (p<0.05) and "Chucheong" gave higher yields than for "Hamasari". In this experiment, the DM yield of all varieties was low. The yield of TDN followed a similar trend to DM yield. According to this results that dough to yellow ripening stage of harvest maturity will be recommendable as proper harvest time for whole crop rice silage.

Estimation of Availability and TDN of Various Silages by Cattle (소에 의한 다양한 사일리지의 이용율 및 TDN 평가)

  • Ji, Byung-Ju;Jin, Guang-Lin;Shinekhuu, Judder;Qin, Wei-Ze;Oh, Young-Kyoon;Sohn, Yong-Suk;Seo, Sung;Song, Man-Kang
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.30 no.2
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    • pp.169-178
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    • 2010
  • The present study was conducted with four ruminally fistulated cattle to examine the fermentation characteristics and effective degradability (ED) in the rumen, and whole tract digestibility and TDN values of various silages (whole crop rye, RS; whole crop barley, BS; Italian ryegrass, IRGS and sudangrass, SGS) which were produced in Korea. The pH of rumen fluid were not greatly affected by silage at most times after feeding but SGS decreased (p<0.049) the ruminal ammonia-N concentration as 7.28 mg/100 ml at 3h after feeding compared to other silages. An acetate proportion from SGS feeding was higher at 1h (p<0.018), 3h (p<0.004) and 6h (p<0.019) after feeding than those from other silages. The propionate ($C_2$) proportion, however, was greater (p<0.001~p<0.042) for the RS and BS than the corresponding values of other silages up to 6h after feeding while the lowest $C_2$ proportion was observed from SGS. The butyrate proportion was lowest (p<0.007~p<0.027) in the cattle fed BS at 1~6h after feeding among silages. An ED of dry matter (DM) in the rumen was highest (P<0.048) for RS as 59.64%, and was reduced in the order of BS (56.12%), IRGS (55.64%) and SGS (54.02%). Similar tendency was observed in the EDs of crude protein (p<0.014) and organic matter (OM, p<0.039). The whole tract digestibility of DM (p<0.032), neutral detergent fiber (NDF, p<0.034) and OM (p<0.041) of SGS was greatly reduced. The TDN value based on whole tract digestibility of silages was highest for RS as 61.1%, and TDN values of BS, IRGS and SGS were 57.1%, 57.9% and 50.7%, respectively. Based on the results obtained from the present study, components in various whole crop silages produced in Korea might affect the ruminal VFA proportion, and especially, NDF content could greatly influence on the TDN value of silage calculated based on the NDF content.

The Effect of Cattle Manure Application on Dry Matter Yield, Feed Value and Stock Carrying Capacity of Forage Crops in Gang-Wondo Area (강원도 지역에서 우분의 시용이 사료작물의 건물수량 사료가치 및 가축사육능력에 미치는 영향)

  • Noh, Jin-Hwan;Lee, Hee-Choong;Kim, Yoon-Joong;Park, Sang-Soo;Lee, Ju-Sam
    • Korean Journal of Organic Agriculture
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    • v.21 no.2
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    • pp.247-263
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    • 2013
  • This study was conducted to investigate the effect of cattle manure application on productivity, feed value, and stock carrying capacity of forage crops in upland and paddy fields at Gang-Wondo area. In the result, dry matter yield of sorghum ${\times}$ sudangrass hybrids obtained was 15.12 ton/ha at the level of 150kg N/ha of composted cattle manure. Significantly highest values of crude protein and total digestible nutrients (TDN) yields obtained were 0.59 and 5.35 ton/ha at the level of 150kg N/ha of composted cattle manure in the first cutting, and 0.44 and 3.70 ton/ha at the level of 150kg N/ha of organic raw cattle manure in the second cutting, respectively. The values of $K_{CP}+K_{TDN}/2$ and $K_{ME}$ of sorghum ${\times}$ sudangrass hybrids obtained was 7.76 and 4.46 head/ha at the level of 150kg N/ha of composted cattle manure. The dry matter yield, crude protein and TDN yields of rice straw were 4.95, 0.16 and 2.75 ton/ha at the level of 100kg N/ha of organic raw cattle manure, and the values of $K_{CP}+K_{TDN}/2$ and $K_{ME}$ of rice straw were 1.89 and 3.43 head/ha. The dry matter yield of winter crops, rye+red clover was 4.36 ton/ha in upland field, and rye+hairy vetch was 4.19 ton/ha in paddy field at the level of 100kg N/ha of composted cattle manure. Crude protein and TDN yields of rye+red clover was 0.29 and 2.38 ton/ha at the level of 100kg N/ha of composted cattle manure in upland field, and rye+hairy vetch was 0.30 and 2.48 ton/ha at the level of 80kg N/ha of composted cattle manure in paddy field. The values of $K_{CP}+K_{TDN}/2$ and $K_{ME}$ of rye+red clover was 2.34 and 2.15 head/ha in upland field, and rye+hairy vetch were 2.27 and 2.11 head/ha in paddy field, respectively. As the result, the productivity, feed value, and stock carrying capacity of sorghum ${\times}$ sudangrass hybrids showed higher values with composted cattle manure than organic raw cattle manure. rye+red clover in upland field and rye+hairy vetch in paddy field were most adaptable mixed combinations for roughage production at Gang-wondo area, it may due to their highly productivity, feed value, and stock carrying capacity.

흑조위축병 이병률이 사일리지용 옥수수의 TDN 수량에 미치는 영향

  • 김동암;김종덕;이종경
    • Proceedings of the Korean Society of Grassland Science Conference
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    • pp.78-79
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    • 1999
  • 미국으로부터 도입된 18종의 옥수수 품종과 국내품종 1종을 가지고 1997년에 경기 수원, 경북 경산 및 충남 천안에서 사일리지 생산성 비교 시험을 수행하였고, 특히 흑조위축병(RBSDV) 이병률이 옥수수의 가소화 영양소 총량(TDN)에 어느 정도 영향을 미치는가를 알아보기 위하여 일련의 조사를 수행하였다.(중략)

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Effect of Seeding Date on Forage Yield and Chemical Composition of Kenaf in Jeju (제주지역에서 파종기에 따른 양마의 사료수량 및 조성분 변화)

  • 조남기;송창길;조영일;고지병
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.46 no.6
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    • pp.439-442
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    • 2001
  • This study has been conducted from April 25, 1999 to June 25, 1999 in Jeju Province in order to determine the influence of seeding date on growth, yield and chemical composition of Kenaf (Hibiscus cannabinus L.) Delaying the seeding date from April 25 to June 25 decreased the plant height of Kenaf from 278.5 cm to 205.7 cm. As for the number of leaves, number of withering leaves, number of branches, and stem diameter decreased as the seeding date was delayed. As the seeding date was delayed, fresh forage yield decreased from 98.5MT/㏊ to 45.9MT/㏊, dry matter yield from 20.7MT/㏊ to 8.2MT/㏊, crude protein (CP) yield from 2.9MT/ha to 1.3MT/ha and total digestible nutrients (TDN) yield form 1l.6MT/㏊ to 5MT/㏊. However, both leaf yield and stem yield were nearly the same tendency. Delaying the seeding date from April 25 to June 25 increased crude protein contents of leaves from 21.5% to 24.4%, crude fat contents from 5.2% to 6.1%, nitrogen free extract (NFE) contents form 39.9% to 41.2% and TDN contents from 64.3% to 69.7%. However, delaying seeding date decreased crude fiber contents from 20.8% to 17.5%, and crude ash contents from 7.9% to 7.0%. Based on the these findings, optimum seeding date for forage production of Kenaf seems to be about 25 April in atmospheric phenomena and volcanic ash soils of Jeju island.

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Growth Characteristic and Productivity of Forage Corn Varieties Sown at the Last Ten Days of May in Central Region of Korea (중부지역에서 5월 하순 파종한 사료용 옥수수의 품종별 생육특성과 조사료 생산성)

  • Choi, Gi Jun;Jung, Jeong Sung;Choi, Ki Choon;Hwang, Tae Young;Kim, Ji Hye;Kim, Won Ho;Lee, Eun Ja;Sung, Kyung Il;Lee, Ki-Won
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.39 no.1
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    • pp.17-23
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    • 2019
  • This experiment was carried out to evaluate the characteristic and productivity of forage corn varieties sown at the last ten days of May at Cheonan of Korea on 2017 and 2018. Forage corn varieties sown on 24th May 2017 and $25^{th}$ May 2018 were emerged in 5th and 1st June, respectively. Silking date of forage corns was different among varieties(p<0.05). Stem length of forage corns was not different among the varieties, except Kwangpyeongok(KPA) and Nero IT. Stem diameter of forage corns was not different amaong the varieties. Outbreak rate of black streaked dwarf virus was lower than 3% in all varieties. Total digestible nutrient(TDN) yield was different among corn varieties(p<0.05), which was higher in P32P75, followed by P2088, P31N27, and KPA. The TDN yield of varieties had direct correlation with stem length, stem diameter and ear yield, respectively(p<0.01). Average of TDN in all varieties was 69.8%. These results suggested that forage corn variety with late-seeding adaptability is more important for increasing the productivity of forage corn If harvesting of winter forage crops have to be finished in the middle ten days of May in middle region of Korea.

Effect of Sowing Dates, Fertilizer Levels and Clipping Treatment on Forage Production and Quality of Barley(Hordeum vulgare L.) and Rye(Secale cereale L.) in Paddy field (답리작 대맥.호맥의 파종기.시비량 및 예취방법이 청예수량과 품질에 미치는 영향)

  • 최영원;이호진
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.30 no.3
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    • pp.340-346
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    • 1985
  • Field experiments were carried out to investigate the effects of sowing dates, ferrilizer levels and clipping treatment of forage production and quality of barley and rye in paddy field. The field emergence rates in barley varieties was decreased rapidly at sowing after November. But in rye varieties, it was not decreased even in sowing until Nov. 3. Winter survival of barley and rye varieties were not affected by fertilizer levels. And winter survival decreased with delay in sowing dates in barley varieties, but, it was not influenced by sowing dates in rye varieties. The production of forage dry matter at heading stage was increased with fertilizer levels, and was decreased with delay in sowing dates. Content of crude protein and crude fat of dry forage at heading stage were increased with fertilizer levels. But, content of crude ash, crude fiber and TDN were not influenced by fertilizer levels. As increased fertilizer levels, NFE Content was decreased and TDN yield was increased with fertilizer levels. In comparisons of TDN yield between barley and rye varieties, TDN yield of rye were superior to those of barley. Clipping twice produced more forage yield than clipping once in both crops. However, optimum clipping interval was about 40 days between first and second clipping in rye but not determined in barley. The l2cm clipping height was the highest production in average total yield.

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Response of Growth Characteristics and Yield of Silage Corns at Different Regions (재배지역별 사일리지용 옥수수 일반생육 및 수량 반응)

  • Son, Beom-Young;Kim, Jung-Tae;Lee, Jin-Seok;Baek, Seong-Bum;Kim, Wook-Han;Kim, Jong-Duk;Ko, Ki-Hwan
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.31 no.3
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    • pp.251-260
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    • 2011
  • This study was carried out to compare growth characteristics and yield of silage corn hybrids at four different regions (Hwaseong, Dangjin, Gochang and Pyeongchang). Two domestic corn hybrids, 'Kwangpyeongok' and 'Gangdaok', and two imported corn hybrids, 'P3394' and '32P75' were used in this study. Plant height and ear height ratio were not significantly different among corn hybrids. 'Kwangpyeongok' was the strongest of all corn hybrids for lodging. The others except 'Kwangpyeongok' were similar to lodging. All corn hybrids were excellent to stay-green. Incidence of southern corn leaf blight (Bipolaris maydis) was low at all corn hybrids. '32P75' was 10.1%, the most of all corn hybrids for incidence of BSDV (black streaked dwarf virus). 'Kwangpyeongok' and 'Gangdaok' were stronger than '32P75' for BSDV. Fresh yield of 'Kwangpyeongok' and 'Gangdaok' were the most of all corn hybrids as 74.85 and 76.68 ton/ha and 'P3394' was the least of all corn hybrids as 64.97 ton/ha. Dry matter yield as 18.83~21.92ton/ha and TDN yield as 12.73~14.52 ton/ha were not significantly different among corn hybrids.