Spring is coming. Do you manage your ventilation properly?Zhengzhou Far Zhuo farming and animal husbandry
Zhengzhou zhuo farming spring outside the temperature changes, easy to cause the chicken group of cold and heat stress, egg fluctuations and disease occurs, which requires the farming friends doing spring ventilation management regulation, to the chicken group provides a suitable, uniform and stable environment, to ensure the health of chickens, production of stable performance and maximize profits.How to do a good job in spring ventilation management, Zhengzhou Yuanzhuo agriculture and animal husbandry suggestions to do the following work:One, choose the best ventilation mode – transverse ventilation pattern 1, principle through transverse fan out harmful gases and humidity, using outside air ventilation little window to let in under the action of negative pressure, in accordance with the prescribed route into the hen house above middle, after fully mixing temperature diffusion to any position henhouse, to eliminate harmful gas and moisture, the purpose of adding fresh air.1. Ensure good airtightness of chicken coop airtightness evaluation standard: close all doors and Windows, start a 122cm (48 inches) extraction fan or two 91.5cm (36 inches) extraction fan, the negative pressure in the chicken coop with good airtightness can reach or exceed 406 Pa — 508Pa.Chicken coop airtight poor measures to take: timely blocking of manure outlet, roof closure, wall cracks, doors and Windows, water curtain and other air leakage places, to ensure that there is no thief wind.(2) The Angle of the backward flow plate according to the width of the chicken house, the installation position of the small window, reasonable adjustment of the Angle of the guide plate, to ensure that the air outside the house according to the required path into the chicken house, the general situation is 12-16 meters wide chicken house, the Angle of the guide plate is controlled at 15-30°, adjust the Angle of the guide plate.2, pay attention to two key points — minimum ventilation, appropriate body temperature 1, pay attention to the minimum ventilation at the lowest temperature at night minimum ventilation is to maintain the minimum air exchange capacity in the chicken house environment, provide oxygen for the growth of chickens, control the relative humidity in the chicken house.Minimum ventilation in house for chickens over 19 weeks old under different outside temperature conditions.2. Pay attention to the suitable stability of the sensible temperature of the chickens. The suitable stability of the sensible temperature of the chickens can provide a suitable and stable warm and hot environment for the chickens, and reduce the cold and hot stress caused by the sudden change of temperature to the chickens.It is affected by the age of chickens, external temperature, relative humidity and wind speed.Example: When the temperature in the house is 26℃, the humidity in the house is 50%, and the longitudinal wind speed is 0.75 m/s (the wind speed can be measured by anemometer, or the formula can be used:Wind speed = actual ventilation/chicken coop cross-sectional area), through the intersection of temperature and wind speed, the sensible temperature is 22.9℃.Take a chicken house in North China with a stock of 16,000 chickens, 300 days old, external temperature -5℃ to 14℃, humidity 50% as an example, the operation process of field ventilation management is as follows: 1. Understand the structure of the chicken house, the length of the chicken house: 91 meters;Width: 12 m;House height: 3.75 meters (ridge height), chicken coop cross-sectional area of 40.5m2;Facilities and equipment: small window width × height: 0.65×0.22m2;Unit: 52;Environmental control equipment: AC2000 environment controller;Number of fans: 8;Fan displacement: 36000 m³/h;Fan exhaust area: 1.24m2.① When the lowest temperature outside the house is -5℃, the actual temperature inside the house is about 15℃;The minimum ventilation required by 16000 chickens was 0.7m³/h· chickens ×16000=11200m³/h;② When the temperature outside the house is 5℃, the actual temperature inside the house can reach about 17℃;The median line of minimum ventilation required by 16000 chickens is 2.4 m³/h· individual ×16000=38400 m³/h;③ When the temperature outside the house is 14℃, the actual temperature inside the house can reach about 20℃;The median line of minimum ventilation required by 16000 chickens is 4.5m³/h· individual ×16000=72000m³/h, at which time the wind speed is 0.5 m/s;① When the lowest temperature outside the house is -5℃, the minimum ventilation volume required is 11200m³/h, the number of fans required is 0.3, and the fan needs to run for 1 minute: stop for 2 minutes; when the target temperature inside the house is 15℃, run for 1 minute and stop for 2 minutes;(2) When the lowest temperature outside the house is 5℃, the median line of the minimum ventilation volume required is 38400 m³/h, and the number of fans required is 1 long rotation;When the indoor temperature is set to 17℃, the captain of typhoon 1 turns;③ When the lowest temperature outside the house is 14℃, the median line of the minimum ventilation volume required is 72000m³/h, and the number of fans is required to be 2 long turns. When the temperature inside the house is set to 20℃, the wind speed of 2 typhoon is long turns, and the wind speed is not more than 0.5 m/s. There is no need to consider the problem of body temperature change caused by the wind speed.(1) When transverse ventilation is used, the area of the air inlet is equal to the area of the air outlet of the fan, and the area of the air outlet of the fan is 1.24m2, that is, the area of the air inlet can meet the requirements when the area of the air inlet reaches 1.24m2;② Calculate the small window opening = 1.24m2 ÷52 ÷ 0.65m = 3.7cm, that is, the small window opening is controlled at 3.5-4cm when the typhoon is 1;2. The small window opening should be controlled at 7-8 cm during typhoon;3. The small window opening should be controlled at 10-12cm during typhoon;③ Negative pressure range: 0.06-0.12 inch mercury hg;(4) Air inlet wind speed: 4.2-5.5 m/s, matching with the negative pressure value to determine the best wind speed.1. Smoke experiment to verify the quality of ventilation effect. Smoke experiment can intuitively observe whether the cold air running path can blow to the chicken, the effect is shown in the figure.2. Whether the temperature difference in the house is reasonable is evaluated from the temperature at each point of the chicken house, and the transverse temperature difference in the chicken house is not more than 2℃;The longitudinal temperature difference of the chicken coop shall not exceed 3℃;The vertical temperature difference of chicken house does not exceed 1.5℃.Zhengzhou far zhuo 3, the production index is stable from rate, mortality rate, infection chicken, respiratory assessment, ventilation adjustment is appropriate: week rate fluctuation within 1%, the rate down smoothly, four days later have no obvious fluctuation of egg production, the proportion of large group of respiratory symptoms appear less than 0.5%.Spring ventilation management is based on the determination of the ventilation volume needed by the chickens, and the three principles of ventilation management are mastered to ensure that the temperature of the chicken house is appropriate, uniform and stable.Through three matching field operation procedures, the ventilation effect was evaluated comprehensively according to the status of the chickens and various indicators, so as to ensure the healthy and stable chickens through the changeable temperature and disease prone spring.Zhengzhou Yuanzhuo Agriculture and Animal Husbandry Zhengzhou Yuanzhuo Agriculture and Animal husbandry Equipment Co., LTD. (13071051500), is specialized in research and development, production, sales, installation, after-sales service integration of agriculture and animal husbandry equipment enterprises.Can be tailored according to the actual production needs of the farm, to provide more intimate service for each customer.Company production of cascading (brood, laying hens, chicken, pathogenies, every) automation farming equipment, stepwise (brood, laying hens, chicken, pathogenies, every) automation equipment of breeding and stock collection automation is the breeding equipment, automatic egg collection equipment, belt type nightsoil machine, automatic feeding machine series of aquaculture equipment with reasonable structure, stable performance, durable and so on.The equipment adopts galvanized aluminum magnesium plate, service life of more than 15 years.