Urea currently has large particles and small particles on the market. In general, urea with a particle diameter of more than 2 mm is called large-particle urea. The difference in particle size stems from the granulation process and equipment used in production. The active ingredients are water-soluble fast-acting urea molecules, with a nitrogen content of 46%. Which of the largest and smaller urea fertilizers is better?
Large urea is relatively low content of small urea dust, high compressive strength, good fluidity, can be bulk transport, not easy to crush and agglomerate, suitable for mechanized fertilization. Large particles of urea dissolve slowly in the soil and can be immersed in deeper soil layers in paddy fields, especially in rice cultivation, to reduce volatilization losses, and at the same time, the large-particle urea biuret content is low, which is beneficial to crops. However, it should be noted that the application of large urea on rice may increase the risk of nitrate leaching.
The small urea has a large surface area and has a large contact surface with water and soil after application, and the dissolution and release rate is slightly faster. The dissolution and release of large particles of urea in the soil is slightly slower. This difference is reflected in the application method, that is, when topdressing, the fertilizer efficiency of small-particle urea is slightly faster than that of large-particle urea. From the perspective of loss, the loss of large urea is smaller than that of small urea. In general, the difference between the speed of the two fertilizers is very small. For the absorption and utilization of crops, urea is a molecular nitrogen, and they are not absorbed directly by crops, and they must be absorbed in large amounts in the soil after they are converted into ammonium nitrogen. Therefore, regardless of the particle size of urea, it is a few days earlier than ammonium bicarbonate for top dressing application. In addition, the particle size of large-particle urea is similar to that of diammonium phosphate, so large-particle urea can be blended with diammonium phosphate as base fertilizer, and it is better not to use large-particle urea as top-dressing.
Feed Additives are divided into microbial feed additives and Chinese herbal feed additives. Among them, microbial feed additive is a kind of microbial products that replace or balance one or more strains in animal ecosystem. In a narrow sense, it is a kind of microbial products that can stimulate the reproduction and growth of beneficial bacteria while resisting the growth of harmful bacteria. Microbial feed additives containing a large amount of beneficial bacteria (active lactobacillus, bifidobacterium, bacillus), compound enzyme, chelating peptide, mildew remover, etc., as the inside of livestock and poultry feed, can rapid reproduction, on the one hand, in bacterial metabolites and gut endotoxin inhibits the growth of other harmful flora, on the other hand, it formed the normal microbial flora in the host, Synthesize the main vitamins for the host, provide nutrition and prevent the invasion of pathogenic bacteria.
There are many different feed additives in category. There are vitamins, amino acides, antibiotics, Trace elements,Buffer feed, flavor agents, Hormonal additives, herbal additives etc.
Feed Grade Cinnamon Powder,Bacillus Licheniformis Powder,Brewers Yeast For Feed Additive,Agricultural Chitosan Oligosaccharide
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