美國/中國關于豬麩皮消化率的研究

畜牧人小李

　　US/Chinese study wheat bran digestibility in pigs

　　美國/中國關于豬麩皮消化率的研究

　　Research conducted by US and Chinese researchers is helping to determine the nutritional value of wheat bran in diets fed to pigs. More inclusion of wheat bran meant less energy available for pigs.

　　美國和中國的研究人員對豬麩皮消化率的研究，有助于確定日糧中麩皮的營養價值。日糧中的麩皮含量越高，意味著豬只可攝取的能量越少。

　　A news update by the University of Illinois explained about the research, written by scientists from theUniversity of Illinois, USA and the China Agricultural University in Beijing, China. It was recently published in the Journal of Animal Science.

　　關于該項研究的內容分析，由美國伊利諾伊大學和中國農業大學共同發表在《動物科學雜志》上。

　　Wheat bran, like many other co-products from the human food industries, contains more fibre than corn and soybean meal, which adversely affects energy digestibility.

　　麩皮，就像許多其它人類食品副產品一樣，比玉米和豆粕含有更多的纖維，對能量的消化率帶來不利的影響。

　　Co-products for pigs喂豬的副產品

　　“To save on feed costs, more producers are turning to co-products,” explained Dr Hans H. Stein, professor of animal sciences at the University of Illinois. “Therefore, there is a need to determine the energycontribution from fibre-rich ingredients. But the effect of dietary fibre on heat production and net energy of diets is unclear.”

　　“為了節省飼料成本,更多的生產商轉向副產品,”漢斯·h·斯坦博士（伊利諾伊大學動物科學學院教授）解釋說，“因此,有必要確認富含纖維成分原料的能量貢獻率。但關于膳食纖維在產能方面和對日糧中能量消化利用率的影響還不清楚。”

　　The research was conducted in the calorimetry unit at China Agricultural University. Growing barrows were fed diets containing 0, 15, or 30% wheat bran. The pigs were housed in metabolism crates inside calorimetry chambers built to measure gas exchange and heat production.

　　該項研究在中國農業大學的量熱法單元內進行，生長育肥閹豬分別飼喂含有0%，15%和30%麩皮的日糧，飼養在新陳代謝量熱法單元內，并測量其氣體交換和產能情況。

　　Photo: Koos Groenewold

　　More wheat bran, less energy麩皮越多，能量越少

　　The digestible energy (DE), metabolisable energy (ME), and net energy (NE) in the diets declined as more wheat bran was included. The DE content of diets containing no wheat bran was 3,454 kcal/kg, compared with 3,161 kcal/kg in diets containing 30% wheat bran. The ME content of the diets decreased from 3,400 to 3,091 kcal/kg, and NE content decreased from 1,808 to 1,458 kcal/kg.

　　日糧中含有麩皮，其消化能DE，代謝能ME，和凈能NE的利用是會打折扣的。當日糧中不含麩皮時，消化能DE是3,454kcal/kg。相比之下，當日糧中添加30%的麩皮時，消化能DE下降到3,161kcal/kg ；代謝能ME從3,400下降到3,091kcal/kg；凈能NE從1,808下降到1,458kcal/kg。

　　The research also validated a procedure commonly used to determine NE. Using the difference procedure, Stein’s team determined the DE, ME, and NE of wheat bran to be 2,168, 2,117, and 896 kcal/kg, respectively. These values were similar to those derived using a regression procedure.

　　這項研究還用于確定凈能NE的一般驗證過程。通過不同的步驟，Stein’s 的團隊確認了麩皮中消化能DE，代謝能ME，和凈能NE分別為2,168, 2,117 和896kcal/kg。這些值與通過線性回歸方程得出的結果相類似。

　　Accurate digestibility values.準確的消化率值

　　Stein says that DE and ME are usually determined using the difference procedure, but NE is usually determined using regression equations. As far as he knows, nobody has compared values derived from the difference procedure with values derived via regression.

　　Stein 說，消化能DE和代謝能ME一般需要通過不同的過程來確定，而凈能NE可通過回歸方程來確定。就他所知，沒有人對通過不同程序得出的線性回歸結果價值進行過比較。

　　“Since experiments to determine NE via the difference procedure are more difficult to conduct than determining DE and ME, it’s helpful to know that using regression to determine NE will yield an accurate value,” Stein concluded.

　　“既然通過不同的試驗程序來確定凈能NE比確定消化能DE和代謝能ME要困難，那么通過使用回歸方程來準確的確定凈能NE值是非常有幫助的。”Stein得出結論。

　　The paper, ‘Wheat bran reduces concentrations of digestible, metabolizable, and net energy in diets fed to pigs, but energy values in wheat bran determined by the difference procedure are not different from values estimated from a linear regression procedure’, was published in the July 2016 issue of the Journal of Animal Science. It was co-authored by Neil Jaworski of the University of Illinois, and Dewen Liu and Defa Li of China Agricultural University in Beijing.

　　本論文關于“在豬的日糧中，麩皮會降低能量的消化率、代謝濃度，而且麩皮中能量的含量及價值通過不用程序測定的結果與通過線性回歸方程得出的結果沒有差異”發表在2016年七月刊的《動物科學雜志》上，由伊利諾伊大學的Neil Jaworski，以及北京中國農業大學的劉德文和李德發教授合著。

　　來源：shipro
　　作者：黃智姿譯

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