The quality of feeding and management of cows during pregnancy determines the health of cows and yaks, the level of milk produced by cows and the speed at which calves develop. During pregnancy, the heart and blood vessels of the cow have certain hypertrophy, the pulse speeds up, and the function of the pituitary gland, adrenal glands, and thyroid glands are strengthened, which increases the content of components in the blood. The metabolic characteristics of pregnant cows are that the process of assimilation exceeds the dissimilation process, and a certain amount of organic substances and inorganic substances are deposited in animals. However, in the first half of pregnancy, the metabolic energy of the body did not increase; during the first quarter of pregnancy, the metabolic intensity increased by 20 to 40%. With the increase of the total metabolic rate, the metabolism of protein and minerals is stronger.
During pregnancy and late in pregnancy, the weight of the cow increases because of the growth of the fetus, the enlarged uterus, and the deposition of nutrients in the cow. If there is a lack of minerals in the diet, the animal will stop the deposition of minerals, which will not only adversely affect the development of the fetus during pregnancy, but will also affect the growth and development of the postpartum calf.
Pregnancy should increase the supply of crude protein. Because 70% of the fetal dry matter is composed of crude protein. The supply of sufficient vitamin A and vitamin D in the cow diet has a great influence on the development and metabolism of the fetus. The lack of carotene can cause miscarriage, poor retention of placenta, and weak calves. If the cow is pregnant in winter, the amount of carotene is not less than 70-80 mg/100 kg body weight, and vitamin D 0.2-0.25 million IU/100 kg body weight.
The total feeding level of pregnant cows depends on their health status and expected production levels. For pre-natal bred cows and dry cows should have a good body condition. During the dry period, the body of the cow increases by an important 10-12% and the daily gain is 800-900g. The good feeding of pregnant cows has a great influence on the composition of postpartum colostrum, and it also indirectly affects the incidence of gastrointestinal diseases in newborn calves.
Legume hay and high quality silage are the main roughage for pregnant dry cows. You can also feed a small amount of good quality hay. The daily amount is 8 - 10 kg of high quality hay, 10 - 15 kg of juicy feed (of which high-quality silage accounts for about 1/2), mixed fine material 3-4 kg. Prenatal 2 - 3 days to increase wheat bran and other "light diarrhea" feed.
Careful management of the cows before and after childbirth. Pre-production cows should have good sensation in order to meet postpartum energy and protein needs. In the later stages of pregnancy, it is forbidden to feed on rotten spoilage and frozen feeds, and not to drink water and ice to prevent crushing and slipping. The cattle shop should not be oversized. Care must be taken during the first few days of childbirth and on duty to prepare for midwifery and confinement. After calving, the cow should be fed warm bran water and a small amount of salt is added to supplement the water and increase the abdominal pressure. Within 1 week postpartum, the cow's reproductive and digestive function were not restored, and the amount of concentrate should not be too much, and 5-7 days can be fed according to normal needs.
The performance of the Baby Monitor Security Camera
The performance of the baby monitor is reflected by its built-in parameters and function combination. The following shows some properties that a high-quality and applicable baby monitor should have. The requirements for baby monitors in this part apply to all audio/video, digital/analog home baby monitors and wireless baby monitors, and are not changed due to the combination mode of the monitoring end and the control end.
The size shall be as small as possible: the small baby monitor (monitoring end and control end) is more convenient to install and carry in the family.Low power display: the baby monitor, especially the monitoring terminal, must work continuously for a long time. Once the product is low in power, it cannot remind parents to charge it in time. When the power continues to be consumed until it is exhausted, the control terminal will be unable to continue to receive any signal.
Voice trigger prompt: Voice trigger means that once the monitoring terminal detects the noise caused by the abnormal behavior of infants or children, it will be displayed at the control terminal through the noise prompt lamp.
The transmission signal frequency can be adjusted: the monitoring end of the baby monitor provides audio and video digital signals to the control end by transmitting wireless signals. If the transmission frequency of the monitoring end is not selected properly, it will produce electromagnetic interference with other household appliances, digital equipment, etc., which will affect the normal use of the product. Therefore, it is necessary to select a baby monitor that allows users to adjust the frequency of the transmitted signal at the monitoring end.
Adjustable volume: a friendly baby monitor will provide a volume selection knob or button at the control end. When parents are in an environment with loud background sound, they can hear the activity sound of babies and children by turning up the volume; When it is late at night or in a quiet environment, the low volume will not affect the normal rest of the people around you when you are answering normally.
VOX function: VOX is the abbreviation of sound activation start. The monitor with VOX function is in standby mode under normal conditions, and the screen and horn stop working, thus reducing the energy consumption of the product; Once it is detected that the monitored object has an abnormal sound exceeding the set standard, it will immediately flash its alarm lamp at the control terminal or directly light up the screen, and simultaneously play the audio and video information sent by the monitoring terminal.
Digital signals and analog signals: baby monitors using digital signals, such as Baohushen baby monitors, will have better transmission efficiency and provide users with clearer sound and picture quality; Moreover, digital signals can be encrypted to prevent being intercepted and interpreted by other receivers, effectively protecting users' family privacy; The electromagnetic signal interference of digital signal will be lower than that of analog signal, so as not to affect the normal work of other household appliances and equipment.
Monitoring end extension: The baby monitor with a friendly user experience should allow users to use one control end to manage the activities of several monitoring ends at the same time, especially in some families with multiple children. This good scalability not only reduces the trouble of carrying multiple control ends at the same time, but also reduces the objective additional expenses for these families.
Temperature display: some products will have the function of realizing the current indoor temperature, and even can set a critical value. Once the room temperature exceeds or falls below the critical value, an alarm signal will be sent. This is a very considerate function for temperature sensitive newborn children or sick children.
Intercom function: The high-end baby monitor allows parents to have a direct conversation with the baby (child) at one end of the monitoring end through the control end, so that children who are alone can provide psychological comfort. If children have any temporary needs or words, they can be known without bothering the guardian to run to the child.
Signal range: theoretically, the signal sent by the monitoring terminal can be received by the remote control terminal, which is more convenient for users to use the baby monitor flexibly. Now more and more families live in large family rooms, even multi-storey villas, and the baby monitor with strong signal receiving ability provides these families with a more convenient way of use. Parents no longer need to set the room beside the children in order to see and hear their children's every move. They can even take the control terminal to go out for a short walk!
Power supply mode: The baby monitor with built-in battery can automatically switch to the battery power supply mode when the external AC power supply is suddenly stopped, so that the user will not be affected to continue to monitor the child in the power failure environment.
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