Formula and production process of floating urea slow-release extruded feed for cattle and sheep

Abstract

The invention discloses a formula of a floating urea sustained release expanded feed for cattle and sheep. The feed comprises urea, an energy feed, a protein feed, mineral salt, an adsorbent, an antioxidant and a mildewproof agent. The floating urea sustained release expanded feed for cattle and sheep is prepared by the steps of: crushing the raw materials, metering according to a certain proportion, mixing, hardening and tempering, performing extrusion puffing and granulating, and drying. The feed has the advantages that: the feed suspends in water and does not sink, the basic shape is kept in a longer time, and the detention time in rumens is relatively longer, so the feed cannot enter rear digestive tracts of the rumens due to the external flow of rumen fluid; the utilization efficiency of urea nitrogen is improved and the ammonia poisoning caused by the rapid decomposition of urea is avoided; meanwhile, protein feed sources are saved, and the raising cost is reduced.

Description

Technical field: [0001] The invention relates to the technical field of protein feed for cattle and sheep, in particular to a formulation of buoyant urea slow-release puffed feed for cattle and sheep and a production process thereof. Background technique: [0002] For ruminants such as cattle and sheep, protein feed can be divided into two categories: one is the polymer of amino acids, that is, protein, such as soybean meal, fish meal, cotton meal, etc. The main component of the feed is protein, and this type of protein is also It is called true protein nitrogen; the other is non-protein nitrogenous compounds (NPN), such as free amino acids, amides, nitrogenous glycosides and fats, alkaloids, ammonium salts, nitrates, betaine, choline, pyrimidine and purine, etc. . [0003] Urea in NPN has a long history as a dietary nitrogen source for ruminants due to its low cost and good effect, and is still widely used today. Research on urea utilization is an important part of rumina...

AI Technical Summary

Problems solved by technology

Urea coating technology mainly uses polymer materials or oils as film-forming materials. The results of in vitro or rumen nylon bag release tests show that the effect of controlling the release rate of urea is better, but the product price is higher. In addition, urea coating products are generally granular. Minor, there may be the following problems: when the coated urea is not fully released in the rumen, it will enter the digestive tract after the rumen with the outflow of rumen fluid, especially in the case of high coarse material, which will deviate the use purpose of the product

Different processing techniques affect the gelatinization of starch and obtain products with different slow-release effects, such as extruded products. Due to the low degree of starch gelatinization, the product has extremely poor formability in water and the slow-release effect is not obvious; semi-extruded puffed products The product improves the degree of gelatinization of starch, but it is not sufficient, and has a certain slow-release effect; the degree of starch gelatinization of puffed products can reach more than 90%, achieving the effect that gelatinized starch is fully coated with urea, which is currently better Gelatinized starch urea processing products, but such products are very easy to absorb water, swell, and then collapse, even when exposed to room temperature, they can quickly absorb water and form a paste. Therefore, after entering the rumen, these products collapse into extremely fine particles due to rapid water absorption , form a huge surface area, accelerate the exposure and decomposition of urea, thus affecting the sustained release effect