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No.36 (1989/12) >

 
Title :ネピアグラス (Pennisetum purpureum Schumach) の生産性および飼料価値に関する研究 : 5. 刈取り高さが栄養価におよぼす影響(畜産学科)
Title alternative :Studies on Productivity and Feeding Value of Napiergrass (Pennisetum purpureum Schumach) : 5. The effect of cutting height on the nutritive value of napiergrass (Department of Animal Science)
Authors :宮城, 悦生
Authors alternative :Miyagi, Etsuo
Issue Date :5-Dec-1989
Abstract :刈取り高さがネピアグラスの栄養価におよぼす影響を検討するため,1983年に刈取り高さ10cm区,25cm区および40cm区の3試験区を設定し,各試験区,刈取り毎に試料を採取し,一般成分とNDFおよびNDF構成成分の定量ならびにin vitro乾物消化率を消定した。さらに,乾物収量にin vitro乾物消化率を乘じて可消化乾物収量を算出し,次の結果を得た。1.一般成分のうち粗蛋白質,粗脂肪および粗灰分含量は高刈取り区がやや高い値を示し,粗繊維含量は逆に低刈取り区がやや高い値を示したが,各成分含量はともに試験区間に有意差は認められなかった。2.NDF,ADF,セルロースおよびリグニン含量は低刈取り区がやや高い値を示し,シリカ含量は逆に高刈り区がやや高い値を示したが,各成分含量はともに試験区間に有意差は認められなかった。3.IVDMDの年間平均値は10区58,675%,25区58.89%,40区59.975%で試験区間に特定の傾向は認められなかった。4. DDM収量は年間10a当り10区2.40トン,25区2.41トン,40区2.41トンで試験区間に特定の傾向は認められなかった。以上の結果から刈取り高さがネピアグラスの栄養価におよぼす影響はほとんどないものと推察される。
The field experiment was conducted to investigate the relationships between the cutting height of Pennisetum purpureum Schumach (napier grass) and change of the nutritive value and digestible dry matter yield (DDMY) in Okinawa 1983. The nutritive value was measured by the chemical composition, neutral detergent fiber (NDF), constituents of NDF and in vitro dry matter disappearance (IVDMD). The cutting heights were 10,25 and 40cm from the ground. The results obtained were summarized as follows : 1. The contents of crude protein, crude fat, nitrogen free extract, crude fiber and crude ash were not significantly affected by the cutting height. 2. The contents of NDF and constituents of NDF were not also significantly affected by the cutting height. 3. At the cutting height of 10,25 and 40cm, the average values of IVDMD were 59.0,60.0 and 60.0%, respectively. 4. At the cutting height of 10,25 and 40cm, the amount of DDMY was 2.40,2.41 and 2.41 tons/10a/year, respectively. From the results, it seemed that the nutritive value of napier grass was not significantly affected by the cutting height.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3881
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.36 p.107 -113
Appears in Collections:No.36 (1989/12)

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