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題 名 | The Relationship between Climatic Factors and Acid-Detergent Fiber, Neutral-Detergent Fiber and Crude Protein Contents in Digitgrass=盤固草酸洗纖維、中洗纖維及粗蛋白與氣象因子的關係 |
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作 者 | 陳嘉昇; 黃耀興; 王紓愍; 成游貴; | 書刊名 | 畜產研究 |
卷 期 | 32:3 1999.09[民88.09] |
頁 次 | 頁255-265 |
分類號 | 437.113 |
關鍵詞 | 牧草品質; 環境; 積溫; Forage quality; Environment; Accumulated temperature; |
語 文 | 英文(English) |
中文摘要 | 本研究以Survenola( Digitaria X umifolia )為材料,於四種割期處理下連續 試驗一年,分析其酸洗纖維( ADF )、中洗纖維( NDF )及粗蛋白( CP )變化,以探討 牧草化學成份與氣象因子間的關係。試驗結果顯示,酸洗纖維、中洗纖維與粗蛋白含量的季 節間差異大於割期處理間差異,其含量變化與收穫前的平均氣溫及日長有顯著相關,但與累 積日照時數及降雨量無關;酸洗纖維、中洗纖維與粗蛋白含量在不同割期間有顯著差異,但 與割期長短之相關並不顯著。本研究並估算累積酸洗纖維、中洗纖維及粗蛋白含量之基礎溫 度。酸洗纖維、粗蛋白含量與累積溫度間之相關係數大於其與平均氣溫之間,但中洗纖維則 無此現象。酸洗纖維與粗蛋白的基礎溫度分別為 15.5 ℃及 15 ℃,其與積溫之相關係數分 別為 0.81 及 0.88。 除了個別因子的探討外,本研究以逐步迴歸選擇重要的影響因子,並 估算因子間的聯合效應。對酸洗纖維而言,聯合積溫及日長兩因子,其迴歸式之決定係數可 達 0.81。 中洗纖維迴歸式之決定係數較低,顯示除氣象因子外,尚有其他重要影響因子。 對粗蛋白而言, 積溫單一因子之決定係數即達 0.78,加上均溫及割期長短後僅微幅的提高 決定係數,而日長之影響力則更低。 |
英文摘要 | Samples of Survenola (Digitaria X umifolia), a variety of Digitgrass, were planted in the field and treated according to a set of programmed harvest cycles to study the impact of climatic factors on the quality of the grass for marketability. Such quality was to be assessed by the contents of acid-detergent fiber (ADF), neutral-detergent fiber (NDF) and crude protein (CP) contained in the grass sample. It was found that seasonal changes had greater effect on the quality of the grass than did the length of the harvest cycle. The ADF, NDF, and CP contents in Digitgrass, as shown in this study, were related to mean temperature and day length, but were not statistically related to accumulated sunlight duration, precipitation or the length of the harvest cycle. The base temperatures for the accumulation of ADF, NDF and CP in Digitgrass were also inferred in this study. The contents of ADF and CP had higher correlation with accumulated temperature ("Tacm") than mean temperature. The highest correlation coefficient (0.81) between the ADF content and Tacm was attained when the base temperature was set to 15.5 C, while the highest correlation coefficient (0.88) between CP and Tacm is attained at a base temperature of 15.0 C. In addition to measuring the effects of individual climatic factors on Digitgrass, stepwise regression was used to measure the combined effects of these factors to the protein and fiber contents in Digitgrass. Through the stepwise regression, we found that the determination coefficient of regression. |
本系統中英文摘要資訊取自各篇刊載內容。