Beyer M, Jentsch W, Hoffmann L, Schiemann R
Forschungsinstitut für die Biologie landwirtschaftlicher Nutztiere, Dummerstorf-Rostock Germany.
Arch Tierernahr. 1994;46(2):173-205. doi: 10.1080/17450399409381769.
The energy and nitrogen metabolism of pregnant sows was measured with the method of indirect calorimetry in dependence on the number of gestation (1,2 and 4), on the energy supply (120, 100 and 80% of the requirement recommendation) and on the gestation stage. Values of maintenance requirement and of energy and nitrogen utilization for body deposition were calculated on the basis of results of energy and nitrogen metabolism. The energy maintenance requirement increased from 389 to 435 and 473 kJ metabolizable energy per kg LW0.75.d with rising number of gestation. The heat production increased from 85th to 115th day of gestation by 6%. The efficiency of the partial energy utilization for the energy deposition amounted to 66% on the average. The efficiency of the partial utilization of digestible nitrogen for the nitrogen deposition was calculated to 75%. The nitrogen maintenance requirement values amounted to 0.5 and 0.4 g digestible nitrogen per kg LW0.75.d in the 1st and 2nd half of gestation.
采用间接测热法，依据妊娠次数（1次、2次和4次）、能量供应（分别为需求推荐量的120%、100%和80%）以及妊娠阶段，测定了妊娠母猪的能量和氮代谢。根据能量和氮代谢结果，计算了维持需要量以及用于体沉积的能量和氮利用率。随着妊娠次数增加，每千克体重0.75次方·天的能量维持需要量从389千焦代谢能增至435千焦和473千焦。妊娠第85天至第115天，产热增加了6%。能量沉积的部分能量利用率平均为66%。可消化氮用于氮沉积的部分利用率经计算为75%。妊娠前半期和后半期，每千克体重0.75次方·天的氮维持需要量分别为0.5克和0.4克可消化氮。
