What is the raw material of stone powder?
At present, the raw materials used in the production are calcite and limestone, usually calcite and limestone contain more than 33%, and the quality can reach 35% to 38%. Usually calcite is white or five colors, limestone is light gray or light yellow, so it is customary to call calcite powder, calcareous limestone powder, which is commonly used as calcium source fodder for egg chicken.
What are the consequences of using bad stone powder?
Give you an example, a small feed mills reflect the use of its layers of layers of material production, laying rate has fallen by a third, the detection of feed calcium content is less than a third standard, further found that using calcium stone powder content is only 22%, and is usually between 35% and 38% of stone powder calcium sent a third, through the powder detection, determine the dolomite powder.
The calcium content in dolomite is 22% - 24%, the magnesium content is too high, 10%, high magnesium can affect the absorption of calcium, iron and copper, so the dolomite is not suitable for the calcium source feed of laying hens. Dolomite is usually white, and calcite is usually white, which is often used as calcite in production, resulting in insufficient calcium content, resulting in decreased egg production rate.
Is the particle size coarse or fine?
Has a chicken farm to pay 220 laying hens eggshell quality has been bad, day age of eggshell color shallow, very brittle, sand, luster, soft shell, no broken egg rate on the high side, from time to time and egg chickens pecking phenomenon occurs, but the crowd were no exception of feed water, waste is normal, spirit is good, the rate also difference with other chickens. After removing the disease and other factors, it was found that all the stone powder used was fine stone powder, and then the fine stone powder was replaced with a thick and fine stone powder, and the problem was solved.
The stone powder of laying hens is not to be crushed, because the small amount of calcium in the stomach is short and the utilization rate is low, resulting in the quality of the eggshell decreased. The study showed that the stone powder was used in a mixture of size and size (i.e., 75%, 6-8 stone powder, 12). 5% 10-12 stone powder and 12. 5% minimum 50 mesh powder) broken egg rate, eggshell intensity is the largest, because the size of the particle size mixture can evenly for calcium, so as to guarantee the quality of shell, and larger particles in the muscular stomach with sand grinding effect, can promote the digestion of feed.
Zeolite powder can be used as stone powder?
Some chicken farm 260 laying hens day age rate fell sharply, soft shell eggs, egg shells, appetite, spirit is fair, stand a few difficulties, claw bending, calcium and phosphorus deficiency were initially determined, inspection found that the powder particle size small, color is pale bluish white, density is small, obviously tests only 2 calcium content. 4%, can be determined as zeolite powder. Change the zeolite powder to stone powder, and the chicken group is basically normal after 5 days.
Zeolite is a kind of aluminum silicate minerals, containing more than 20 elements, cavity, strong adsorption function, has antibacterial, reduce fecal odor, promote growth, can be used as an additive, but as a result of calcium content is only 2% or so, cannot be used as calcium source feed instead of stone powder, otherwise it will lead to a serious shortage of feed calcium. In addition, the rice stone; Sepiolite and zeolite are similar, should be different from the stone powder, farmers should improve the identification ability, avoid misuse.
How to grasp the dosage of stone powder?
Some chicken farm 160 days of age spirit of laying hens, well appetite, water quantity increase, part of the waste white water-like loose stool, there are a few dead chickens, autopsy observed in kidney is porphyritic flowers, filled with ureter with white lime, needle-like urate crystals found under microscope, a diagnosis of gout, check formula powder dosage 8 found. 5%, bone meal 2. 5 percent, calcium 3. 78 percent, and metabolism is only 10. 3 MB/kg, it can be determined that due to low daily grain metabolism, high calcium content, large amount of food intake in the early stage, resulting in excessive calcium intake, the deposition caused gout. After asking, because of the corn price increase, in order to reduce the cost, reduce the amount of corn, and replace with the stone powder and the bran, the calcium content in the diet is too high. Adjust the recipe and metabolize 11. 3 megajoules per kilogram, calcium 3. Thirty percent, two weeks later, the chickens are normal.
The egg chicken can feed, the daily grain can be high, the food intake is small; Low energy, large intake. In coordination with daily food, metabolism and other nutritional indicators should be kept basically constant, otherwise, it is easy to cause malnutrition or overdose, and the ratio of metabolic energy to calcium should be 3. 4-3. 5. When the metabolic energy is reduced or increased, the calcium will be reduced or increased, and the amount of stone powder will be changed accordingly.
Studies have shown that stone powder reacts with digestive acids secreted by the stomach and stomach, and the results increase the PH of these parts of the digestive system. In the stomach and stomach of the chicken, the retention time of the stone powder mainly depends on the size of the powder particles. We measured the amount of calcium ions released after the reaction of the two particles with the size of the particles.
It is found that large and small particles have different solubility due to different surface area. Small particles of powder surface area is big, with peptic acid catalytic area is too big, so faster than large particles dissolve powder, layer chicken feed powder contains six to eight purpose than eggshell intensity produced by powder containing 50 purpose is better, because of the large particles than the small particles of stone powder has higher biological utilization.
The large granule powder has a lower dissolution rate and is beneficial to improve the strength of eggshell. To improve the quality of the eggshell, it is necessary to increase the retention time of calcium in the digestive tract. The granules of the granules are gradually dissolved, so that the shells can absorb calcium continuously and steadily during the formation process.
The proportion of reasonable stone powder in the feed of laying hens is 75%, 6-8 stone powder, 12.5%10-12 stone powder and 12.5% stone powder, and the laying hens need more calcium.