科学与财富
科學與財富
과학여재부
SCIENCES & WEALTH
2013年
6期
233
,共1页
粗蛋白质%凯氏定氮法%蒸馏时间
粗蛋白質%凱氏定氮法%蒸餾時間
조단백질%개씨정담법%증류시간
crude protein%kjeldahl nitrogen determination%distillation time
本实验以凯氏定氮法的原理,采用KDY-9830凯氏定氮仪,分别选用三种蛋白质饲料、能量饲料、粗饲料和青贮饲料,经过2h消化,在4min、5min和6min蒸馏时间内测定其蛋白质含量,目的选择最佳蒸馏时间.结果以上四种饲料从4min增加到5min时,粗蛋白增加值分别为0.42%、0.50%、0.45%、0.45%,从4min增加到6min时,增加值分别为0.18%、0.23%、0.19%、0.25%.表明,测定饲料粗蛋白含量的最佳蒸馏时间应为5min为宜.
本實驗以凱氏定氮法的原理,採用KDY-9830凱氏定氮儀,分彆選用三種蛋白質飼料、能量飼料、粗飼料和青貯飼料,經過2h消化,在4min、5min和6min蒸餾時間內測定其蛋白質含量,目的選擇最佳蒸餾時間.結果以上四種飼料從4min增加到5min時,粗蛋白增加值分彆為0.42%、0.50%、0.45%、0.45%,從4min增加到6min時,增加值分彆為0.18%、0.23%、0.19%、0.25%.錶明,測定飼料粗蛋白含量的最佳蒸餾時間應為5min為宜.
본실험이개씨정담법적원리,채용KDY-9830개씨정담의,분별선용삼충단백질사료、능량사료、조사료화청저사료,경과2h소화,재4min、5min화6min증류시간내측정기단백질함량,목적선택최가증류시간.결과이상사충사료종4min증가도5min시,조단백증가치분별위0.42%、0.50%、0.45%、0.45%,종4min증가도6min시,증가치분별위0.18%、0.23%、0.19%、0.25%.표명,측정사료조단백함량적최가증류시간응위5min위의.
@@@@Three kinds of protein feeds, energy feeds, roughages and silages were respectively selected in this experiment. Each of these feeds was first digested for 2 hours and then digested for 4, 5 and 6 minutes separately. At the end the crude protein within each treatment was determined with the KDY-9830 Kjeldahl instrument according to the principle of the Kjeldahl method to select the optimal distillation time. Results showed that the crude protein was determined 0.42%, 0. 50%, 0.45%and 0.45%higher respectively in the four feeds with the distillation time of 4 minutes than 5 minutes, whilst the crude protein was determined 0.18%, 0.23%, 0.19%and 0.25%higher respectively in the four feeds with the distillation time of 4 minutes than 6 minutes. The results indicated that the optimal distillation time for the determination of crude protein in the feed should be 5 minutes.
