九州において越冬可能な暖地型牧草10草種のし好性を主とした放牧利用適性  [in Japanese] Palatability and Adaptability of 10 Tropical Grasses Used as Grazing Pasture in Kyushu  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 名田 陽一 NADA Yoichi
    • 九州農試:(現)北海道農試) Kyushu National Agricultural Experiment Station:(Present address)Hokkaido National Agricultural Experiment Station

Abstract

熊本県西合志町において越冬可能な暖地型牧草10草種に放牧し,そのし好性,採食量,草地密度を調査した。さらに別の圃場で同じ草種について刈取試験を行ない季節生産性を調査した。入牧時の牧草量にたいする採食量の割合(採食率)および評点法によるし好性はソルガム「シルク」,カーペットグラスが極めて高く,セントオーガスチングラス,ベイジイグラス,スイッチグラス,リトルブルーステム,キシュウスズメノヒエと続き,バーミューダグラス「コモン」,同「ティフトン44」,ウイーピングラブグラスは極めて低かった。比較のために同一放牧草地内のダリスグラスとバヒアグラスを評点で測定した結果,ダリスグラスのし好性は極めて高く,バヒアグラスは中間よりやや低かった。また牧草乾物率とし好性との間に負の相関があり,出穂茎および生長を停止した牧草の乾物率が高く,これらのし好性が低かったと推測した。放牧条件下における草地の密度はウイーピングラブグラスがやや株数の減少をきたした以外はほふく型,たち型牧草ともに良好であった。刈取試験による季節生産性は,季節を通して平準な草種(バーミューダグラス「コモン」,同「ティフトン44」),季節の進むにつれて増加する草種(キシュウスズメノヒエ,カーペットグラス,ベイジイグラス),季節の進むにつれて減少する草種(セントオーガスチングラス,ウイーピングラブグラス,スイッチグラス,リトルブルーステム)等多様であった。一方採食量の季節変動はし好性の要因が加わるために刈取収量よりみた季節変動とは異なった。上記の要因を総合して,カーペットグラス,ソルガム「シルク」,ベイジイグラスが九州での放牧利用に有望であると考えられた。

Ten tropical grasses which survived under winter condition in Nishigoshi, Kumamoto were grazed and palatability, volume of intake and density of pastures were investigated. Another experiment for estimation of seasonal productivity was also conducted cutting the same ten grasses at another experimental field. Intake ratio was calculated with the grass weight at the start and at the finish of grazing. In terms of intake ratio and scoring for palatability, sorghum cv "Silk" and carpetgrass showed highest palatability followed by St. Augustinegrass, vaseygrass, switchgrass, little bluestem and knotgrass, while bermudagrass cv "Common", bermudagrass cv "Tifton 44" and weeping lovegrass showed poorest palatability. As the important grasses for grazing in Kyushu, dallisgrass and bahiagrass were scored for palatability in the same grazing field, where dallisgrass showed highest palatability while bahiagrass showed poor palatability. Lower palatability was correlated to higher dry matter percentage of grasses, suggesting lower palatability of heading shoot and poorly growing leaves which have higher dry matter percentage. Plant densities were kept in good condition in both creeping type and erect type grasses under grazing condition except weeping lovegrass which decreased stubble numbers. From the cutting experiment, bermudagrass cv "Common" and bermudagrass cv "Tifton 44" showed even seasonal productivity, and knotgrass, carpetgrass and vaseygrass showed increasing productivity with the advance of season, while St. Augustinegrass, weeping love-grass, switchgrass and little bluestem showed decreasing productivity with the advance of season. On the other hand, seasonal fluctuation of intakes/ha were not same as seasonal cutting yields because of different palatability of each grasses. As a result of total investigation, carpetgrass, sorghum cv "Silk" and vaseygrass were considered to be promising grasses for grazing in Kyushu.

Journal

  • Japanese Journal of Grassland Science

    Japanese Journal of Grassland Science 30(4), 434-440, 1985

    Japanese Society of Grassland Science

Cited by:  1

Codes

  • NII Article ID (NAID)
    110006466594
  • NII NACSIS-CAT ID (NCID)
    AN00194108
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0447-5933
  • NDL Article ID
    3023507
  • NDL Source Classification
    RB74(畜産--飼料・草地)
  • 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
    CJPref  NDL  NII-ELS  J-STAGE 
Page Top