在不同的环境温度下养的层型小的建模能量需求
Yihui Liu1, Hongchao Jiao1, Xiaojuan Wang1
1Department of Animal Science, Key Laboratory of Efficient Utilization of Non-grain Feed Resources (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong 271018, PR China.
Poultry science
|October 30, 2025
概括
这项研究发现,虽然更高的温度降低了年轻的京芬层型小的禁食热量产生和生长,但它们对体重增加的净能量需求 (NE) 仍然不受影响. 这项研究提供了一个计算基于温度和体重增加的NE需求的公式.
科学领域:
- 动物科学动物科学
- 禽类的营养 养
- 环境生理学环境生理学
背景情况:
- 准确养家禽需要准确的营养需求估计.
- 养殖温度显著影响家禽的生理阶段和能源需求.
研究的目的:
- 为了确定养殖温度对1至14天龄的京层型小的净能量 (NE) 需求的影响.
- 根据环境温度和体重增加,建立一个计算NE要求的公式.
主要方法:
- 试验1:使用间接热量计 (氧气消耗和二氧化碳产生) 在五种不同温度 (30-38°C) 中测量维护 (MEm) 的能量需求.
- 试验2:评估生长表现 (体重增加,料摄入量,料转化率) 和在不同温度条件下的身体组成.
- 使用Jingfen层类型的小,样本大小为MEm的160个,增长性能研究的480个.
主要成果:
- 禁食热量产生 (FHP) 随着温度的增加显著下降 (P < 0.001).
- 随着温度升高,体重增加和料摄入量下降 (P < 0.001),而料转化率仅在第一周受到影响 (P < 0.01).
- 相对器官重量 (心脏,肝脏,乳腺肌肉) 随着温度升高而下降;然而,身体体重增加的净能量需求并未因温度而显著改变 (P > 0.05).
结论:
- 养殖温度影响年幼的能量代谢和生长性能.
- 年龄在1-14天的Jingfen层型小的体重增加的净能量需求是独立于养殖温度的.
- 为了计算NE要求,我们得出了一个特殊的公式:NE (kJ/bird·day−1) = (505.93 - 162.78T - 38.87T2 + 194.41T3) ·kgW0·75 + 7.16·BW增益 (g/d).
相关概念视频
Energy Budgets
10.5K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
10.5K
Background and Environment Affect Phenotype
7.4K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
7.4K
Oxygen Requirements and Growth Patterns
1.2K
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
1.2K
Thermoregulation
2.2K
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
2.2K
Production Efficiency
18.1K
Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
18.1K


