Road noise pollution is serious, and farms are close to roads, which is not conducive to the normal growth of livestock. Due to the heavy traffic in expressway, the noise of horns and brakes affects the normal rest of livestock, causing bad emotions such as fright, intimidation, irritability, etc., and will also lead to loss of appetite, affecting the normal rest and growth of livestock, which is very unfavorable to the normal growth of livestock. Roadside dust pollution, traffic on the road, dusty on the road, the road is like a dust pollution area, and the construction of farms near the road is bound to be polluted.
There are many cars coming and going in expressway, and every car is a source of pollution. Automobile exhaust contains many harmful components, such as carbon monoxide, sulfur dioxide, smoke particles and odor (formaldehyde). ), very toxic. Livestock often breathe these tail gases, causing slight irritation to the respiratory tract, nose and eyes of livestock, leading to the decline of oxygen-carrying capacity of livestock blood, and even suffocation in severe cases, which seriously affects the normal growth of livestock.
Therefore, the farm must be far away from the highway and keep a reasonable distance from the highway to provide good and comfortable environmental conditions for the normal growth of livestock. In the selection of duck breeds, fattening ducks should have the characteristics of meekness, quietness, rough feeding resistance, good fattening performance and fast growth. There are mainly Beijing Duck, Gaoyou Duck, Jianchang Duck, Hai 'an Duck, Linwu Duck, Gushi Duck, Zhongshan Duck, Cherry Valley Duck and Shanghai White Duck.