Bergner H, Tegtmeier B
Arch Tierernahr. 1985 Aug;35(8):535-43. doi: 10.1080/17450398509425216.
9 pigs of a live weight at the beginning of the experiment of 33 kg received in 3 consecutive series of experiments (3 animals/group) a basic barley ration of 1.0-1.2 kg per animal and day. In groups 1 to 9 the following supplements were given: 1 = without N-supplement, 2 = 10.5 g urea, 3 = 79 g dried skim milk, 4 = 11 g urea, 5 = without N-supplement, 6 = 110 g horse bean coarse meal, 7 = without N-supplement, 8 = 95 g dried skim milk, 9 = 120 g horse bean coarse meal. In groups 1-6 the ration was supplemented with 150-165 g DM partly hydrolysed straw meal per animal and day. After 20 days the animals received a single dosis of 0.5 g/kg0.75 15N-urea (72.1 atom-% 15N-excess) with the morning meal of the first day of the experiment. During the four days of the experiment groups 1-6, due to the straw meal supplement, excreted significantly higher N-amounts than the corresponding groups 7-9. In comparison with the first day of the experiment (1 h after the morning meal) urea concentration in the blood decreased to the following percentage in the sequence 1-9: 64; 65; 77; 54; 64; 73; 82; 88; 84 on the second day of the experiment (1 h before the evening meal. Between the excretion of 15N-excess in faeces (y = mg) during the four days of the experiment and the concentration of urea in the blood (x = mmol/l) there was the following significant negative correlation: y = -40.1 X +340.(ABSTRACT TRUNCATED AT 250 WORDS)
9头猪在实验开始时体重为33千克，在连续3组实验中（每组3头动物），每头动物每天给予1.0 - 1.2千克基础大麦日粮。第1至9组给予以下补充剂：1组 = 无氮补充剂，2组 = 10.5克尿素，3组 = 79克脱脂奶粉，4组 = 11克尿素，5组 = 无氮补充剂，6组 = 110克蚕豆粗粉，7组 = 无氮补充剂，8组 = 95克脱脂奶粉，9组 = 120克蚕豆粗粉。第1至6组的日粮中每头动物每天补充150 - 165克部分水解的秸秆粉。20天后，动物在实验第一天的早餐时接受0.5克/千克0.75的15N - 尿素单剂量（15N过量72.1原子%）。在实验的四天里，由于补充了秸秆粉，第1至6组排出的氮量显著高于相应的第7至9组。与实验第一天（早餐后1小时）相比，实验第二天（晚餐前1小时）血液中尿素浓度按1至9组的顺序下降到以下百分比：64；65；77；54；64；73；82；88；84。在实验的四天里，粪便中15N过量的排泄量（y = 毫克）与血液中尿素浓度（x = 毫摩尔/升）之间存在以下显著负相关：y = -40.1X + 340。（摘要截断于250字）
