应用体外法评定科威418的营养价值

科威４１８是作者通过特殊工艺研制而成的牛羊高蛋白复合添加剂，其中含有尿素、营养保护剂、酶及多种微量元素等。体外试验表明，以豆饼、尿素及科威４１８作为氮素饲料时，培养３ｈ的培养液中ＮＨ＿３Ｎ浓度依次为１４．５，２８．７及２２．３ｍｇ·（１００ｍＬ）￣（－１）（Ｐ＜０．０１）；培养１２ｈ的ＮＨ＿３Ｎ浓度依次为７．３，１１．４及１３．３ｍｇ·（１００ｍＬ）￣（－１）（Ｐ＜０．０５）；真蛋白氮浓度依次为３８．６，２９．８及３５．４ｍｇ·（１００ｍＬ）￣（－１）（Ｐ＜０．０５）；基质风干物消化率依次为５４．９７％，６１．４４％及６４．９１％（Ｐ＜０．０１）。

Evaluation of the Nutritive value of Kewei-418 with In Vitro Method

Kewei-418 was a compound feed additive with high protein contents developed by the authors with special technology for cattle/sheep/goats,which contains urea,nutritive preservative,enzymes,trace elements and carrier.When soybean meal, urea or Kewei-418 was sole protein feed in the iso-nitrogen culture media,the contents of ammonia nitrogen of formentation liquid in in vitro system were 14.5.28.7 and 22.3 mg·(100mL)^-1 at the 3rd hour (P<0.01),and 7.3:11.4 and 13.3mg·(100mL)^-1 at the 12 th hour (P<0.05),and the true protein nitrogen contents of fermentation liquid at the 12th hour were 38.6,29.8 and 35.4mg·(100mL)^-1media were 54.97,61.44 and 64.91% (P<0.01),respeetively.