The combination of organic fertilizer and chemical fertilizer can get twice the result with half the effort, so some commercial organic fertilizers are added with some nitrogen fertilizers, such as urea, ammonium sulfate or ammonium chloride, and the total nitrogen content is 6%~ 10%, or even higher, but some enterprises have not clearly marked it in the packaging bags. If these commercial organic fertilizers are still applied according to the general application amount of farmyard manure with nitrogen content 1%, it will inevitably cause crops to burn roots and seedlings. Therefore, some experts suggest that the application of commercial organic fertilizer must know the nitrogen content, and the fertilizer with higher nitrogen content should be applied in the principle of small amount and multiple fertilization.
What is a food with high nitrogen content? Protein is a complex nitrogen-containing organic compound with a large molecular weight, most of which is as high as tens of thousands to millions. The long axis of the molecule is 1 ~ 100 um. They are composed of 20 amino acids through amide bonds ... Generally, the nitrogen content in protein is 16%, that is, 1 nitrogen is equivalent to 6.25 parts of protein. ...
Among animal proteins, protein of milk and eggs is the best among all foods in protein, because it is the easiest to digest and has complete amino acids, so it is not easy to cause gout attacks.
The protein content of egg yolk is slightly higher than that of protein, but an egg yolk can contain as much as 300 mg of cholesterol. Even people without heart disease should not eat more egg yolk. protein's cholesterol content is 0; Egg yolk contains a lot of oil. Usually, we don't see oil in the egg yolk, but when you bake the egg yolk in the microwave oven, you will find that a lot of oil can flow out. You can also see the oil in the salted egg yolk. The calorie of egg yolk is six times that of protein, so egg yolk is also a high-calorie food, and it is a food that people who need to lose weight need to go on a diet.
Milk not only supplements protein, but also provides abundant calcium, which can prevent calcium deficiency. Skim milk powder has the highest calcium content and almost no fat, so milk made from skim milk powder is the best protein and calcium source for adults to keep slim.
The best vegetable protein is soybean protein, which contains 35% protein and is easy to absorb. Therefore, soy protein has always been the main source of protein for vegetarians. Bean products can lower cholesterol and fight cancer. Soybean protein is rich in isoflavones, which are hormone-like compounds that can inhibit the growth of tumor cells caused by hormone imbalance. Besides, edible fungi are the main source of protein for slimming people.
There is 20g protein per100g sesame sauce, which is higher than protein in lean pork, eggs, small yellow croaker and pomfret.
nitrogen equilibrium
Protein is decomposed into amino acids and small peptides in the digestive tract and absorbed. Most of them are used to synthesize tissue proteins, repair and grow damaged muscle tissues after exercise, and some of them are also used to synthesize various functional proteins and nitrogen-containing compounds other than protein, such as purine and creatine. After some amino acids are absorbed, they are decomposed in the body for energy supply.
Under the condition that the body does not ingest protein at all, protein in the body is still being decomposed and synthesized. An adult man weighing 60 kilograms still excretes 3.2 grams of nitrogen from urine, feces, skin and secretions every day, which is equivalent to 20 grams of protein. This inevitable consumption of nitrogen without intake of protein is called "necessary nitrogen loss". In other words, an adult male weighing 60kg should consume at least 20g of high-quality protein every day. Maintain normal protein metabolism in the body.
In a certain period of time, the relationship between nitrogen intake and nitrogen excretion is called "nitrogen balance", which is used to measure the protein requirement of human body and evaluate the protein status of human muscles.
There are three situations of nitrogen balance:
1, nitrogen balance: in a certain period of time, the amount of nitrogen taken in is equal to the amount of nitrogen discharged. It means that the synthesis and decomposition of protein in human body are in a balanced state, and the muscle circumference of human body is in the original circumference and level.
2. Positive nitrogen balance: the intake of nitrogen is greater than the discharge of nitrogen, and the synthesis of protein is greater than the decomposition, so the damaged muscle fibers will be quickly repaired and increased after exercise. Muscles are in a state of decline.
3. Negative nitrogen balance: nitrogen intake is less than nitrogen elimination, and protein synthesis is less than decomposition. At this time, the muscle protein of human body provides energy for the decomposition of physical activities.
What are the organic compounds with high nitrogen content 1? Melamine (chemical formula: C3H6N6), white monoclinic crystal, almost tasteless, slightly soluble in water (3. 1g/L at room temperature), soluble in methanol, formaldehyde, acetic acid, hot ethylene glycol, glycerol, pyridine, etc. , but insoluble in acetone and ether? Non-flammable and stable at room temperature. The product will decompose at high temperature to produce highly toxic cyanide gas.
2. Biurea (molecular formula: C2H5N3O2), white crystalline powder. The melting point is 190℃ (decomposition) and the relative density is 1.467(-5/4℃). Crystals in water contain 4 molecules of crystal water, which loses water at about 1 10℃. Soluble in hot water and hot alcohol, slightly soluble in ether. Pharmaceutical intermediates, used to make sleeping pills and sedatives, also have the effects of slow diuresis and lowering blood pressure; In chemical industry, it can be used as fiber bleaching agent, paper flame retardant, coating for leather and textiles, foaming agent for foamed plastics and sponge products, and additive for resin, plastics, paint, adhesive, dye and lubricating oil. In agriculture, it is used as long-acting nitrogen fertilizer and herbicide; In animal husbandry, it is an excellent non-protein nitrogen feed additive for ruminants. As a feed additive, it is the same as urea, but safer than urea.
3. Urea is also called carbonyl diamine, carboxamide and urea. It is an organic compound composed of carbon, nitrogen, oxygen and hydrogen, also known as urea (the homonym of urine). The nitrogen content is about 46.67%. The density is1.335g/cm3. The melting point is 132.7℃. Soluble in water and alcohol, insoluble in ether and chloroform. It is weakly alkaline.
When making the nitrogen content of organic fertilizer, it is necessary to air dry the sample. How to air dry The so-called air drying is to air dry naturally in a ventilated environment without direct sunlight.
What is the highest nitrogen fertilizer and the highest ammonium nitrogen fertilizer? Urea has the highest nitrogen content and does not contain ammonium ions.
Ammonium nitrate is the highest ammonium nitrogen fertilizer.
Which foods are high in nitrogen? Foods with high nitrogen content in food:
The yolk, milk and soybean sesame sauce in some eggs contain 20g of protein, which is higher than the protein in lean pork, eggs, small yellow croaker and pomfret.
The protein content of egg yolk is slightly higher than that of protein, but an egg yolk can contain as much as 300 mg of cholesterol. Even people without heart disease should not eat more egg yolk. protein's cholesterol content is 0; Egg yolk contains a lot of oil. Usually, we don't see oil in the egg yolk, but when you bake the egg yolk in the microwave oven, you will find that a lot of oil can flow out. You can also see the oil in the salted egg yolk. The calorie of egg yolk is six times that of protein, so egg yolk is also a high-calorie food, and it is a food that people who need to lose weight need to go on a diet.
Milk not only supplements protein, but also provides abundant calcium, which can prevent calcium deficiency. Skim milk powder has the highest calcium content and almost no fat, so milk made from skim milk powder is the best protein and calcium source for adults to keep slim.
The best vegetable protein is soybean protein, which contains 35% protein and is easy to absorb. Therefore, soy protein has always been the main source of protein for vegetarians. Bean products can lower cholesterol and fight cancer. Soybean protein is rich in isoflavones, which are hormone-like compounds that can inhibit the growth of tumor cells caused by hormone imbalance.
How to calculate the nitrogen content of nitrogen fertilizer? Divide the atomic weight of n by all atomic weights.
Which of the following nitrogen fertilizers has the highest nitrogen content? Ammonium nitrate has the highest nitrogen content. As a multiple-choice question, you can compare four options. The molecular formulas of A and B both contain two nitrogen atoms, so CD is higher. The molecular weight of sulfur and oxygen in A must be greater than that of hydrogen and oxygen, so the answer can be worked out quickly without calculation. B has the highest nitrogen content.
The order of nitrogen content from high to low is: a, d, c and b.
The calculation method of nitrogen content is: relative atomic weight of nitrogen element ÷ relative molecular weight × 100%.
What is the fertilizer with the lowest nitrogen content? What is its nitrogen content? Ammonium bicarbonate, containing nitrogen 17%.