关键词: 山东细犬, 能量需要, 能量平衡

Abstract: Energy is a very important index of the nutriology. The imbalance between the adsorption and consumption will exert influence on the animal's health and the maintenance of its characteristics as an experimental animal. The research on the energy needs of the canines is often a research of the basic metabolizing rate. Lately there are a lot of research methods, such as the heat-measuring method or the weight-maintaining method. The latter refers to a method in which we can get the energy need by using the energy need to retain the stability of the weight in a given period of time (more than 5 weeks). In this case the energy got by eating is the need of energy. By selecting 12 healthy Shandong canines of one year or so and dividing them randomly into 3 groups, with 4 in each group and then feeding each group with food of different energy level regularly at 9 in the mornings and allow them to drink as they like. Then feed them regularly in the morning with fixed amount and free drinking. Measure weighs every week in empty stomach. Collect the excrements for 4 continual days from the 15th day on, and mix them evenly, then take the samples to measure the humidity and the nitrogen contained in the samples. Make the rest into air-dry specimen to measure the energy level. The main results are summarized as follows: After 6 weeks' feeding with different energy levels, the 3 groups of animal change their weights respectively from 19 56±1 32kg to 19 28±0 89kg,20 10±0 78 kg to 20 35±1 12 kg and 19 78±1 21kg to 19 90±1 23kg,with no significant increase( P >0 05);the turd energy (1322 20±71 30, 1318 45±82 56, 1321 64±74 78 kJ/d)and urine energy(248 50±8 60, 247 68±9 10, 253 19±8 68 kJ/d)experiences no significant change, but digestion energy(3568 60±71 30, 3828 31±82 56, 4274 25±76 54 kJ/d)and metabolizing energy(3120 10±62 54, 3580 63±79 63, 4021 06±75 23 kJ/d.)witnesses great changes( P <0 05), which indicates that we need not specially control the energy level of the food to maintain the stability of the weight, because its weight can be adjusted by different metabolizing levels.

Key words: Shandong canine, Energy demand, Energy equilibrium