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| Registros recuperados: 134 | |
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| 河原, 孝吉; 後藤, 裕作; 萩谷, 功一; 鈴木, 三義; 曽我部, 道彦. |
| 本分析では, 一般的な方法 (RA) とVanRadenが提案した方法 (VRA) から算出した近交係数を比較検討し, 北海道のホルスタイン集団における近親交配の状況と産乳能力の近交退化および育種価への影響を調査した. 近交係数は, 4,630,163頭の血縁情報を使用し, 再帰的アルゴリズムを用いて算出した. 分析では, 第1に, RAと利用可能なすべての血縁を使用した場合 (RA0), 第2に, RAを使用し, 基礎世代を1950年以前にした場合 (RA50), 第3として, VRAを使用し, 基礎世代を1950年以前にした場合 (VRA50) の3種類の近交係数を算出した. 産乳量の近交退化と育種価は, 1976から2000年8月までに乳期を終了した検定記録から推定した. アニマルモデルには, 近交退化を説明するための偏回帰を含めた. また, 両親の近交係数を使用し, メンデリアンサンプリング分散を補正した. VRA50は, RA50と比較し, 平均近交係数のレベルを高く推定した. RA50とVRA50は, 計算時間の短縮に効果があった. 1960, 1970, 1980, 1990および2000年生まれの雌牛の平均近交係数は, VRA50で各々0.26, 0.56, 1.23, 1.89および4.18%, 種雄牛は各々0.31, 0.43, 0.77, 1.97, および5.14%であった. 1971-1980, 1981-1990および1991-2000年の各期間に生まれた雌牛の年あたり近交係数平均上昇量は, 各々0.07, 0.06および0.22%/年, 種雄牛は各々0.03, 0.12および0.45%/年であった. RA0はVRA50と比較し, 近交退化量を若干低く推定した. 乳量, 乳脂量,... |
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Palavras-chave: Inbreeding coefficient; Inbreeding depression; Breeding Value; Milk production; Holsteins. |
| Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2616 |
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| Laha, R; Das, M; Goswami, A; Singh, P. |
| High rise of temperature (41.3℃), hemoglobinurea, anorexia, decrease milk production, anemia and diarrhea were observed in a cross-bred cow of aged 4 years, maintained in the dairy farm of ICAR research complex for North Eastern Hill Region, Umiam, Meghalaya, India, in its 3 months of lactation. After examination of Giemsa stained blood smears and molecular diagnosis using polymerase chain reaction, the disease was diagnosed as babesiosis caused by Babesia bigemina. The animal was treated successfully with a single injection of 4,4' diamidine diazoamine benzene diaceturate in recommended dose. No parasite was detected by examination of Giemsa stained blood smears after a period of 48 hours post treatment onwards. A total loss of 51.6 liter milk production... |
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Palavras-chave: Babesia bigemina; Cow; Loss; Milk production. |
| Ano: 2012 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3539 |
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| 河合, 正人; 市川, 雅賢; 大谷, 昌之; 池滝, 孝; 松岡, 栄; KAWAI, Masahito; ICHIKAWA, Masayoshi; OTANI, Masayuki; IKETAKI, Takashi; MATSUOKA, Sakae. |
| The objective was to evaluate the effect of different proportion of alfalfa silage and corn silage on the nitrogen utilization and milk production of dairy cows. Eighteen lactating Holstein cows were divided into three treatment groups. The cows in the three treatment groups were fed mixture of alfalfa silage and corn silage，which were formulated (dry matter basis) at 1) 80:20 (AS80)，2) 60:40 (AS60) and 3) 40:60 (AS40) ratios，respectively. Grass hay and concentrate were fed also to adjust silage ratio (65% of total DM)，roughage ratio (70% of total DM) and CP contents (15%DM) of the diets among AS80，AS60 and AS40. The ratio of degradable intake protein (DIP) to non-fibrous carbohydrate (NFC) in AS80，AS60 and AS40 were 0.27，0.27 and 0.28，respectively. Milk... |
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Palavras-chave: アルファルファサイレージ; コーンサイレージ; 分解性タンパク質; 窒素利用性; 乳生産; Alfalfa silage; Corn silage; Degradable intake protein; Nitrogen utilization; Milk production. |
| Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3012 |
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| Flaten, Ola; Lien, Gudbrand D.. |
| The EU regulation governing organic production will require 100% organic feed in organic dairy systems from August 2005 compared with 85% currently in Norway. This study aimed to assess adjustments in resource use and financial impacts on organic dairy herds using a discrete stochastic programming model. Farm management effects of the regulatory change varied between farm types. For the two organic dairy systems examined, both having a milk quota of 100 000 litres but with varying farmland availability, the introduction of the 100% organic feed regulation resulted in an economic loss of approximately 6-8% of the net income compared to the current regime. The economic loss was mainly due to the considerable higher price of organic compared to conventional... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Feed regulation; Organic farming; Milk production; Stochastic programming; Livestock Production/Industries. |
| Ano: 2005 |
URL: http://purl.umn.edu/24245 |
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| Hovhannisyan, Vardges; Vasa, Laszlo. |
| Armenian milk marketing cooperatives provide several benefits, of which the increased opportunity for milk marketing is valued most by member farmers. During the cooperative action milk production has also increased due to seminars on cattle feeding, artificial insemination, sanitation programs, and support by cooperatives in feed procurement. Another benefit is that through pooling products of specified grade or quality, marketing cooperatives are better able to market milk to large-scale buyers than individual owners. Putting their efforts together cooperatives can move to distant markets and thus expand their sales opportunities. This is of paramount importance for those cooperatives that have a sole buyer. In addition to milk marketing, almost all of... |
| Tipo: Journal Article |
Palavras-chave: Agriculture; Cooperation; Cooperative; Milk production; Transition economy; Agribusiness; International Relations/Trade. |
| Ano: 2007 |
URL: http://purl.umn.edu/58902 |
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| Hunt, Diana; Shiki, Shigeo; Ribeiro, Rosana; Biasi, Danilo; Faria, Amarildo P.. |
| In the discussion of agrarian reform in Brazil, a central concern is the competitiveness of farms on land settlements. This comparative study between milk producers on land settlement schemes and outside aims to enhance understanding of the settlers’ technical and economical potential. The analysis is based on data collected from 39 milk producers from the Rio das Pedras settlement and 42 milk producers located in the bordering municipalities of Uberlândia and Monte Alegre, State of Minas Gerais. The field research took place on April and June but the farm data refer to production, costs, and income occurred in March 2006. We use various technical and economic measures to assess farm performance, though focused on the gross margin per liter and per... |
| Tipo: Journal Article |
Palavras-chave: Agrarian reform; Competitiveness; Efficiency; Milk production; Triângulo Mineiro.; Agribusiness; Q 15. |
| Ano: 2009 |
URL: http://purl.umn.edu/60820 |
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| Dominguez, Jose Carlos De Miguel; Vidal, Tomas Perez; Gonzalez, Xose Anton Rodriguez. |
| RESUMEN: El nivel de cuota láctea por explotación y la transferencia de cuota entre las distintas explotaciones juegan un papel principal en la reestructuración del sector productor de leche en España. En este trabajo se estiman el valor de una unidad de cuota, de su valor de capitalización en el horizonte del año 2006 y la concreción de algunos determinantes de dicho valor. El estudio se realiza utilizando los datos de 32 explotaciones de leche gallegas para el periodo 1990-1999, y como resultado del mismo se deducen conclusiones de interés en cuanto al funcionamiento del mercado de la cuota y a la política de gestión de las mismas. PALABRAS CLAVE: Producción de leche, función de costes, valor de la cuota SUMMARY: The level of milk quota for farm and the... |
| Tipo: Journal Article |
Palavras-chave: Milk production; Cost function; Quota value.; Demand and Price Analysis; Q12; Q18. |
| Ano: 2003 |
URL: http://purl.umn.edu/28750 |
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| Lopes, Marcos Aurelio; Carvalho, Francisval de Melo; Cardoso, Milton Ghedini; Dias, Alessandra Silva. |
| Estudou-se a rentabilidade da atividade leiteira na região de Lavras/MG, analisando a influência do nível tecnológico sobre o custo de produção do leite. Foram identificados os componentes com maior influência sobre os custos finais da atividade e calculado o ponto de equilíbrio. Os dados, provenientes de 17 sistemas de produção, representando os níveis tecnológicos baixo, médio e alto, foram coletados mensalmente, entre janeiro de 2004 e dezembro de 2005. Considerou-se a margem bruta, a margem líquida e o resultado (lucro ou prejuízo) como indicadores de eficiência econômica. O nível tecnológico influenciou os itens componentes do custo operacional efetivo da atividade leiteira, bem como o custo total de produção do leite - a lucratividade e... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Análise de rentabilidade; Bovinocultura de leite; Custo de produção; Nível tecnológico; Ponto de equilíbrio; Break-even; Cost production; Milk production; Profitability analysis; Technological level; Livestock Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/109709 |
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| Fuller, Frank H.; Beghin, John C.; Boland, Michael A.; Babcock, Bruce A.; Foster, William E.. |
| We assess the international competitiveness of the dairy industries in Argentina and Chile, combining recent market intelligence gathered from field visits with quantitative simulations of global policy reform scenarios. Both countries exhibit strong potential for export growth but face significant internal and external barriers to expanding their dairy industries. Global policy reforms would resolve some of the international obstacles to their expansion. Argentina has great potential, but it is handicapped by its current macroeconomic policies, trade policy distortions, and the uncertainty associated with policy implementation. Chile is more limited in terms of natural capacity for expansion, but it has a positive trade and investment environment. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Argentina; Agricultural trade policy; Chile; Comparative advantage; Competitiveness; Dairy processing; Exports; Milk production; Production Economics; International Relations/Trade. |
| Ano: 2006 |
URL: http://purl.umn.edu/18708 |
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| Registros recuperados: 134 | |
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