Pellet feed is one of the most important types of forage formed feed products. In addition to standard nutrient testing, the quality of fodder pellets is generally determined according to the measurement items of grain pellets, including particle surface conditions, chalking rates, hardness, moisture content, and bulk density.
Whether the surface of the particle surface is smooth or rough with cracks, whether the color is uniform or not, whether there is mold deterioration and odor. Powdering rate Pulverization rate or durability (durability = 100%-powdering rate) is an important indicator for evaluating pellet feed quality.
Hardness hardness not only affects the chalking rate, but also relates to the palatability of livestock and poultry. There are many types of spiral (tablet) hardness testers and hydraulic hardness testers used at home and abroad. Tablet hardness tester method: Take 30 to 100 pellets of pellets after cooling and drying, pick up 20 particles with good surface quality, 1.5 to 2.0 times of their diameter, and measure the crushing force in the diameter direction. , and then take the average and standard deviation.
Moisture content Take three representative particle samples (weight 100-200 g), put them in a dry vessel, dry at a constant temperature of 1052°C until the weight is constant, weigh after cooling, and calculate the water content.
Bulk Density The bulk density can be used to directly measure the bulk density of the pellet feed, or to measure the volume of the sample first, and then measure the weight of the sample.
Density Take 3 representative particles and smooth both ends. Measure the weight, length and diameter of each particle.
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