At present, the lamb's lactation period is generally 3 to 4 months. Is it 3 months or 4 months? Mainly depends on the following three factors: 1. Lamb's constitution, especially the lamb's birth weight and pre-weaning constitution; 2. The quantity and quality of the roughage and concentrate feed; 3. The breeding farm breeding plan. By combining the above three factors, we can accurately determine the specific sheep farm or lamb's lactation period.
In order to minimize the losses caused by weaning stress, in addition to special management techniques for weaning lambs, we must link and transition from nutrition. So, how does the lamb feed after weaning?
1. timely feeding, to meet the nutritional needs of the lamb during lactation. Lamb stage is the period of the greatest growth and development of sheep. In order to avoid the nutritional stress of the lamb, it is necessary to supplement the lamb timely. The technical points are as follows: (1) The lamb is born for 7 to 15 days, and the lamb is allowed to follow the ewes to feed on roughage and concentrate, in order to show that the lamb imitates the feeding behavior of the ewes. During this period of the lamb, we can call it the "imitation period." (2) The lamb can be trained for 16 to 20 days, and the lamb can be trained to feed a small amount of high-quality hay and mixed concentrate. It is recommended that appropriate amounts be added to the concentrate. Specific compound micronutrients for carrots, bone meal, salt, and lambs, and special vitamins for lambs; (3) After 21 days of birth, lambs can allow lambs to freely eat high-quality roughage, and at the same time, quantitatively feed concentrates. Feeding standards for concentrate feed during this period are as follows:
21 to 30 days, 50 to 80 grams/day
31～60 days, 100～120g/day
61 to 90 days, 200 g/day
91-120 days, 250g/day
The general principle is that a lamb can take 10-15 kilograms of concentrate feed during a lactation period.
2. Strengthen the feeding and management of lambs so that weaned lambs can be weaned smoothly. For the sheep farms that produce lambs, we recommend the “one-time weaning method.†For sheep farms that are not concentrated in lambs or the lactating capacity of ewes is too strong, the “multi-day weaning method†is recommended. (1) For lambs that have been weaned, lambs can be put into the lambs for a period of time, which can significantly reduce the psychological stress of the lambs; (2) Scientific preparation of concentrate supplements for weaning lambs. Post-weaning supplements and lactating lamb concentrates require a feed transition period of 5 to 7 days.
We may have ever heard of the Bullet Fixed Focus Camera/ Fixed Focus Bullet Camera HD/ Bullet Fixed Focus Journal Camera/ Fixed Focus Bullet Camera IR/ Fixed Focus Bullet Surveillance Cameras/ Fixed Focus Analog Bullet Cameras, so what is the Bullet Fixed Focus Camera? We know that the Bullet refers to the camera shape, so what about the Fixed Focus? Actually, the Fixed Focus refers to a type of the camera lens. Today let me introduce the camera lens for you.
The camera lens is the key equipment of the video system. The lens' quality (index) directly affects the overall index of the camera. The lens is equivalent to the lens of the human eye. As you know, if there is no lens, the human eye cannot see anything. That is to say, if there is no lens, then the output image of the camera will just be white without any clear image output; which is consistent with the principle of our home cameras.
Actually, there are many classifications for the camera lens. Today please let me introduce one classification for you---the classification according to the structure.
1. The fixed focus lens with the fixed aperture
The lens has only one focus adjustment ring that can be manually adjusted. Rotating the ring left and right can make the image on the CCD target surface clearest. There is no aperture adjustment ring, so the aperture cannot be adjusted, and the luminous flux entering the lens cannot be changed by changing the lens factors, but can only be adjusted by changing the illuminance of the shooting site. The structure is simple and the price is cheap.
2. The fixed focus lens with the manual iris
Compared with fixed focus lens with the fixed aperture, the fixed focus lens with the manual iris has an extra aperture adjustment ring. The aperture range is generally from F1.2 or F1.4 to fully closed, which can easily adapt to the illuminance of the shooting site, and the aperture adjustment is done manually. The illuminance is uniform and the price is cheap.
3. The fixed focus lens with the automatic iris
Compared with the fixed focus lens with the manual iris, the fixed focus lens with the automatic iris has an extra gear-driven micro motor on the iris adjustment ring, and a 3 or 4-core shielded wire is drawn from the drive circuit, then connected to the camera's automatic iris interface seat. When the luminous flux entering the lens changes, the charge generated by the CCD target surface of the camera changes accordingly, thenthe video signal level changes, and a control signal will be generated and transmitted to the automatic iris lens, so that the motor in the lens can perform the corresponding rotation to complete the task of resizing.
4.The electric zoom lens with the automatic iris
Compared with the fixed focus lens with the automatic iris, the electric zoom lens with the automatic iris two extra micro motors. One motor is connected with the zoom ring of the lens, and can control the focal length of the lens when it rotates; the other motor is connected with the focus ring of the lens, and it can complete the focus of the lens When it rotates with control from the former motor. However, due to the addition of two motors and an increase in the number of lens groups, the size of the lens has also increased accordingly.
All in all, it would be helpful to know about the camera lens if you want to know more about the Bullet Fixed Focus Camera and the whole video monitoring field.
Bullet Fixed Focus Camera, Fixed Focus Bullet Camera HD, Bullet Fixed Focus Journal Camera, Fixed Focus Bullet Camera IR, Fixed Focus Bullet Surveillance Cameras, Fixed Focus Analog Bullet Cameras
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