Observing method: Applicable to powder pesticides, first look at the appearance of the drug, if it is already damply agglomerated, the smell is not strong or there are other odors, and can be hand rubbed into groups, indicating that the basic failure; for emulsion pesticides, the first bottle of static Set, if the liquid is turbid or delaminated (ie oil-water separation), precipitates are formed or the floc is suspended, indicating that the chemical may have failed.
Heating method: It can also be used for the identification of powder pesticides. Take 5 to 10 grams of pesticide and put it on a piece of metal to heat it. If there is a lot of white smoke and there is a strong pungent odor, it means that the medicine is good. Otherwise, it means that it has failed.
Floatation and Suspension: To identify wettable powder pesticides, use floatation and suspension methods. Take a 200 g glass of fresh water, and weigh 1 g of pesticide. Gently and evenly sprinkle on the surface of the water. Observe carefully: Within 1 minute. Wet and soluble in water, indicating that it is not dead pesticides, otherwise it is a failure of pesticides. It is also desirable to take 30-50 grams of pesticide in a glass container, add a small amount of water to make a paste, then add 150-200 grams of fresh water to mix well, and let stand for 10 minutes to observe. The undissolved pesticide has good solubility. The suspended particles are fine, the settling velocity is slow and the amount of sedimentation is small, and the failure pesticide is the opposite.
Dilution method: Dilution method can also be used to identify emulsion pesticides. Take 50 grams of pesticide, place it in a glass bottle, add 150 grams of water, and shake it for 30 minutes. If the liquid is homogeneously milky white, and there is no oil on the float, there will be no precipitate. This indicates that the medicine is good, otherwise it is a failure pesticide. , And the more oil on the top, the worse the medicine.
Amino acid additives are used in feed to balance or supplement a particular production purpose of the required nutrients. The main amino acids added in the feed are: lysine, tryptophan, methionine, threonine these limiting amino acids. Amino acids are the basic building blocks of proteins. The essence of protein nutrition is amino acid nutrition. The core of amino acid nutrition is the balance between amino acids.
The balance of amino acids in natural feed is very poor. Almost all of them are not balanced. The animal body in the limited feed can not synthesize themselves.
They can only rely on eating intake of amino acids. The amino acid content of natural feed is very different, each is not the same, because of different kinds, different ratio of natural feed composed of full price compound feed, although try to mix according to the principle of amino acid balance, but their various amino acid content and the proportion between amino acid is still variable, various. Therefore, amino acid additives are needed to balance or supplement the requirements for a particular production purpose.
feed amino acides Lysine,feed amino acides Tryptophan,high quality Threonine
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