The longitudinal ventilation technology of livestock and poultry houses was first widely used in the breeding of eggs and broilers, and the application in cowsheds and pig houses has gradually increased. Compared with the traditional transverse ventilation technology, the vertical ventilation technology has the advantages of uniform distribution of gas, high air velocity, fresh air, elimination of dead angle of ammonia gas, reduction of blow and suction, etc., which can effectively improve summer livestock and poultry houses. Internal environment. First, the type of longitudinal ventilation Vertical ventilation can be divided into positive pressure ventilation and negative pressure ventilation. The use of this technology first requires a reasonable selection of equipment. According to animal husbandry species, housing structure and area and breeding scale for scientific calculations, a reasonable choice of fan models, livestock housing longitudinal ventilation system resistance is generally 15 to 30 Pa, should be similar to the pressure head of the air volume fan, get High operating efficiency. Second, equipment installation and management The scientific position of the equipment installation location and the standardization of equipment operation and maintenance play a key role in the play of the superiority of the process. This technology is generally applicable to the disinfection of the environment in farmhouses and on farms of all sizes. Its technical essentials: 1. Installation Longitudinal ventilation technology installs the fan on the wall of the livestock house for vertical ventilation. The high-temperature air in the house is exhausted by a fan, and the cool fresh air outside the house is introduced into the room. The installation of the exhaust fan is determined according to the span and longitudinal depth of the livestock house, for example, a chicken house of 80 to 10 meters, the exhaust fan length is 1.25 to 1.4 meters, and the fan surface of the exhaust fan should be at an angle of 10 degrees with the wall, which can increase the ventilation efficiency by 10%. The air flow rate is 2~2.2 meters/second, and the distance between each fan is 2.5~3 meters. Determine the number of open fans based on the temperature, ventilation, and performance of livestock and poultry. 2. Management (1) In hot weather, keep the air inlet completely open and close the air inlet. This will not only increase the air circulation speed, but also weaken the air flow and affect the ventilation effect. (2) Clean the fan blades and shutter blades frequently and adjust the elasticity of the fan belt to ensure the exhaust effect. Close all doors and windows and possible leaks to ensure vertical ventilation. (3) When the indoor temperature is too high, it can be used in conjunction with water curtains, spray cooling and other equipment, while excluding too much water vapor, so that the relative humidity of the air in the house is maintained in an appropriate state. (4) Maintain moderate indoor temperature, maintain stable and uniform air flow, avoid dead angles of air flow, and prevent water vapor from condensing on walls and ceilings.
Anthocyanidins is a kind of water-soluble natural pigments widely existing in plants in nature. They are colored aglycone obtained from the hydrolysis of anthocyanins. Most of the main colorants in fruits, vegetables and flowers are related to them. Under the condition of different PH value of plant cell vacuoles, anthocyanidins make the petals colorful. The main functions about anthocyanidins are antioxidant and free radical scavenging function, nutritional fortifier in food and natural pigment.
Black Berry Extract,Mulberry Fruit Extract,Cranberry Extract Powder,Blackberry Flavoring Extract Xi'an Longze Biotechnology Co., Ltd. , https://www.bestbilberry.com