针对高残留食物消耗量和低残留食物消耗量选育的白来航鸡之间的代谢差异。

Metabolic differences between White Leghorns selected for high and low residual food consumption.

Luiting P, Schrama J W, van der Hel W, Urff E M

Department of Animal Breeding, Wageningen Agricultural University, The Netherlands.

Br Poult Sci. 1991 Sep;32(4):763-82. doi: 10.1080/00071669108417402.

Abstract

From each of two populations of White Leghorn laying hens, 6 'efficient' and 6 'inefficient' hens were used in energy metabolism studies involving indirect calorimetry with activity measurement. 2. Hens classified as efficient or inefficient with respect to residual food consumption had comparable body weight and production. 3. Efficient and inefficient hens showed similar energy metabolisability, cloacal temperature, shank dimension and egg composition. 4. However, efficient hens produced less heat; activity-related heat production accounted for 29 to 54% of the difference in total heat production between efficient and inefficient hens. 5. Plumage quality also explained some of the difference in heat production, but to a lesser extent (14 to 19%). 6. Adjustment for heat increment of production changed the heat production difference slightly (-5 to 1%). 7. What was finally left unexplained (100 - 54 - 14 + 5 = 37% to 100 - 29 - 19 - 1 = 51%) was of the same magnitude as activity-related HP and is discussed in relation to basal metabolic rate.

摘要

从两个白来航母鸡群体中，各选取6只“高效”母鸡和6只“低效”母鸡用于能量代谢研究，该研究采用间接量热法并测量活动量。2. 就剩余食物消耗量而言，被归类为高效或低效的母鸡体重和产蛋量相当。3. 高效和低效母鸡的能量代谢率、泄殖腔温度、胫部尺寸和蛋的组成相似。4. 然而，高效母鸡产生的热量较少；与活动相关的产热占高效和低效母鸡总产热差异的29%至54%。5. 羽毛质量也解释了产热差异的一部分，但程度较小（14%至19%）。6. 对生产热增量进行调整后，产热差异略有变化（-5%至1%）。7. 最终无法解释的部分（100 - 54 - 14 + 5 = 37%至100 - 29 - 19 - 1 = 51%）与与活动相关的产热具有相同的量级，并将结合基础代谢率进行讨论。