Beyer M, Jentsch W, Hoffmann L, Schiemann R, Klein M
Forschungsinstitut für die Biologie landwirtschaftlicher Nutztiere Dummerstorf-Rostock Germany.
Arch Tierernahr. 1994;46(1):7-36. doi: 10.1080/17450399409381755.
The chemical composition and the energy content of the conception products, the reproductive organs and the live weight gains or losses of pregnant and lactating sows were determined in dependence on the litter number (1, 2 and 4) and the energy supply (120, 100 and 80% of requirement recommendation) of sows as well as on the course of gestation and lactation. The results will be used as a basis for factorial derivation of requirement recommendation. The deposition of protein and energy in the conception products in dependence on the time is characterized by an exponential function. The deposition of nutrients and energy in the conception products is increased with rising litter size. The deposition of nutrients and energy per fetus is lower in the litter number 1 than in the litter number 2 and 4. The energy supply in the selected limits has no significant influence on the litter size as well as on the intrauterine deposition of nutrients and energy. The litter number, the energy supply as well as the course of gestation and lactation influence considerably the weight, the chemical composition and the energy content in the mammary gland. The chemical composition and the energy content of the live weight gains or losses of pregnant and lactating sows are strong affected by the energy supply. The increased energy supply of the pregnant sows is connected with increased live weight gains and with increased contents of dry matter, fat and energy however decreased contents of protein in the live weight gains. The live weight losses of the lactating sows are connected with mobilisation of body fat and body protein. The proportion of body fat to body protein degradation is increased with increased losses of body weight. Regression equations are calculated for the relationships between course of gestation and lactation respectively and deposition of protein and energy in the conception products, reproductive organs and maternal live weight gains or losses of sows.
根据窝产仔数（1、2和4）、母猪的能量供应（分别为需求推荐量的120%、100%和80%）以及妊娠和泌乳过程，测定了妊娠和泌乳母猪的妊娠产物、生殖器官的化学成分和能量含量以及体重增加或减少情况。这些结果将作为需求推荐量因子推导的基础。妊娠产物中蛋白质和能量的沉积随时间呈指数函数变化。随着窝产仔数增加，妊娠产物中营养物质和能量的沉积增加。第1窝仔猪每头胎儿的营养物质和能量沉积低于第2窝和第4窝。在选定的能量供应范围内，能量供应对窝产仔数以及营养物质和能量的子宫内沉积没有显著影响。窝产仔数、能量供应以及妊娠和泌乳过程对乳腺的重量、化学成分和能量含量有相当大的影响。妊娠和泌乳母猪体重增加或减少的化学成分和能量含量受能量供应的强烈影响。妊娠母猪能量供应增加与体重增加、干物质、脂肪和能量含量增加相关，但体重增加中蛋白质含量降低。泌乳母猪体重减轻与体脂肪和体蛋白的动员有关。随着体重损失增加，体脂肪与体蛋白降解的比例增加。分别计算了妊娠和泌乳过程与母猪妊娠产物、生殖器官和母体体重增加或减少中蛋白质和能量沉积之间关系的回归方程。
