The advantages of Ultrasonic Cleaning Machine are:the ultrasonic cleaning effect is good and the operation is simple.The sound that people hear is an acoustic signal with a frequency of 20-20000 Hz.Sound waves with a frequency of more than 20000 Hz are called ultrasonic waves.The propagation of sound waves propagates longitudinally according to a sinusoidal curve,generating a large number of small bubbles.Ultrasonic cleaning machine one reason is that localized tensile stress occurs in the liquid and forms a negative pressure.The reduction in pressure supersaturates the gas originally dissolved in the liquid and escapes from the liquid and becomes a small bubble.Ultrasonic cleaning machine the other reason is that the strong tensile stress tears the liquid."A hollow,known as cavitation. Ultrasonic Cleaning Machine Ultrasonic Cleaning Machine,Benchtop Ultrasonic Cleaning Machine,Standard Cleaning Machine,Lightweight Cleaning Machine Henan Sanqiang Medical Equipment Liability Co.,Ltd , http://www.sterilizers-china.com
After the calf was weaned, the yak calf was mainly bred extensively. When the weight reached 300 kg, the yak was used for fattening, and the fattening method for the market weight was achieved in the short term. This method of fattening has the advantages of low cost, low consumption of feed, and high economic efficiency. It is a fattening method for beef cattle that is popular among the general public. The fattening of the shelf cattle includes distillers' grain fattening, silage fattening, ammoniated straw fattening and high-energy diet fattening. 1 Distiller's grains fattening method: distiller's grains, bean curd residue and beet residue are all good feeds for fattening cattle. Dregs fattening is a traditional method of fattening beef cattle in China. Distillers grains are a by-product of the wine industry. Distillers grains are rich in yeast, glycerol, alanine, cellulose, ash, and B vitamins. Distillers grains are therefore a good feed for beef cattle. At the beginning, because the cow does not like to eat vinasse, it only gives a little, mainly hay and coarse material. After half a month, gradually increase the distiller's grains and reduce the amount of hay fed. By the middle of finishing, the amount of distiller's grains can reach 20-30 kg/day, together with a small amount of fine feed and good palatability feed to ensure good appetite. When feeding distiller's grains, we must first feed hay and silage straws, and finally feed concentrates. Drink water one hour after feeding. Fattening cattle require 5-6 kg of concentrate, plus 0.002%-0.003% of monensin. And 0.5% sodium bicarbonate, while supplemented with vitamin A and salt better. 2 Storage Feeding Method: Silage corn and fresh grass are one of the best methods for fattening beef cattle. The digestibility of high-quality silage fresh grass is high, and the dry matter digestibility can reach 70%. Dairy farms in Hebei Province were fed diets dominated by silage weeds to achieve higher daily gains (0.67 kg), 250 kg fattening cattle, 15 kg of silage weeds, 3 kg of hay per day, and mixed concentrates. The material is 2.5 kilograms, and the two-month slaughter reaches 300 kilograms. Even without silage alone feeding silage grass, 200 kg of finishing cattle can achieve higher daily gains. When using silage corn to feed beef cattle, better daily gains can also be achieved. With the increase of the amount of concentrates per day, the feed intake of silage corn decreased. Although the daily gain increased, the daily consumption of concentrate also increased significantly. For beef cattle that only eat silage corn, appropriate addition of a small amount of urea to the diet is beneficial for weight gain. When silage corn is fed, the requirement is to increase the amount of feed, and the calf's habit is followed by increasing the amount of feed. Simultaneously, 10 to 15 g of sodium bisulfate is added to reduce the hazard of organic acids. 3 ammoniated straw fattening method: The ammoniation of crop straw can increase the nutritional value of straw and improve feed palatability and digestibility. Allowing cattle to eat freely, supplemented with the right amount of concentrate can achieve the purpose of increasing the weight of beef cattle. However, because it is a feeding mode with low concentrate and high raw material, it takes a long time for fattening, so it is not suitable for fast and early turnover. Slaughter scale feeding mode. For the heavy frame cattle, if the ammoniated straw is selected as the basic coarse material, appropriate amount of green coarse material and high quality hay can be used, and the proportion of concentrate material can be appropriately increased to achieve the goal of rapid fattening in a short period of time. The proportion of concentrates was: 65.9% corn, 9.3% bean cake, 1% bone meal, 2.5% shell powder, 0.5% mineral and vitamin additives, and 0.8% salt. Jiaxiang County, Shandong Province, used this concentrated feed to obtain an excellent effect of increasing the daily weight gain by 1 kg on the basis of free intake of ammoniated straw. During the entire 80 days of the fattening period, a consumption of 2.99 kg was required for each 1 kg of weight gain. 4 High-energy dietary fattening: This is a high-concentrate, low-coarse fattening method. For shelf cows weighing 200-300 kg and ages of 1.5-3 years, the proportion of concentrate in the diet should be no less than 70%. , 15 to 20 days or a transition period after 1 month to adapt the cow.