チモシー(Phleum pratense L.)草地における集約放牧技術の開発 : 1. 短期輪換放牧したチモシー草地の家畜生産性  [in Japanese] Development of an Intensive Grazing System Utilizing Timothy (Phleum pratense L.) Pastures. : 1. Performance of beef steers and heifers under short rotational grazing combined with cutting use on timothy swards.  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 池田 哲也 IKEDA Tetsuya
    • 北海道農業試験場草地部:(現)北海道農業試験場総合研究部 Hokkaido National Agricultural Experiment Station:(Present address)Hokkaido National Aguricultural Experiment Station
    • 三田村 強 MITAMURA Tsuyoshi
    • 北海道農業試験場草地部:(現)農業環境技術研究所 Hokkaido National Agricultural Experiment Station:(Present address)National Institute of Agro-Environmental Sciences

Abstract

チモシー(Phleum pratense L., TY)の晩生品種ホクシュウを用いて, 草地の一部を春期に刈取った後, 放牧利用する兼用利用と短期輪換放牧を組み合わせた集約的利用法による家畜生産性について検討した。アバディーン・アンガス種去勢牛の放牧期間中の日増体量は0.73kg/dayで, 単位面積当たり増体量は668kg/haであった。これらの増体成績は, いずれも既往の報告より高く, TY草地を集約的に用いることにより, 高い家畜生産が得られることが明らかとなった。しかし, 夏期間の放牧牛の増体速度は春期, 秋期に比べ低下する傾向があり, この原因としてTYの栄養価の低下が考えられた。

Performance of steers and heifers (Aberdeen Angus) was investigated under the intensive grazing system on timothy (Hokushu, TY) swards (2.4ha×2 replications) in 1988 and 1989. Each experiment sward was divided into 35 paddocks, and grazed rotationally during 168 days from May to October in both years. During May- mid June, 14 or 15 paddocks were used for grazing and the other paddocks were harvested for ensiling at the early June. During late June-October, all paddocks were used for grazing. Grazing animals were divided into three herds, herd of steers that grazed through the grazing season and herd of steers and herd of heifers, those grazed temporally in both years. Results obtained were as follows (1) The averages of sward height were maintained about 30 cm high throughout the grazing seasons. On the other hand, herbage allowances were kept the sufficient level of over 3 kg DM/100 kg BW throughout the grazing seasons, by adjusting grazing area to demand of animals. (2) Dry matter digestibilities (DMD) of TY were also kept relatively high (73-81%) through the grazing seasons except in summer. The lowest DMD was 65% in summer of 1988, due to the lack of precipitation. (3) The average daily gains of steers that grazed through the grazing season were high (0.70-0.75 kg/day). Cumulative body weight gains per unit land area over grazing season were high in both of two years (614-721 kg/ha).

Journal

  • Japanese Journal of Grassland Science

    Japanese Journal of Grassland Science 44(4), 342-346, 1999

    Japanese Society of Grassland Science

References:  13

Cited by:  6

Codes

  • NII Article ID (NAID)
    110003849741
  • NII NACSIS-CAT ID (NCID)
    AN00194108
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0447-5933
  • NDL Article ID
    4680412
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産) // ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-344
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IR  J-STAGE 
Page Top