How to fertilize vegetables with urea

Urea, also known as carbamide, is an organic compound composed of carbon, nitrogen, oxygen and hydrogen. It is a kind of white crystal. So how does urea fertilize the vegetables?

How to fertilize vegetables with urea

Urea can be used as base fertilizer, topdressing and extra-root topdressing. When urea is used as base fertilizer, organic fertilizer, phosphate fertilizer, potash fertilizer and about 30% nitrogen fertilizer should be applied at one time in combination with soil preparation. Urea is most suitable for foliar spraying of nitrogen fertilizer, can be combined with pest control to add 0.5% of 1% urea solution, sooner or later sprayed, the effect is good.

II. Storage methods of urea

1. Ensure that the urea bag is intact before use, handle it gently during transportation, rain-proof, and store it in a dry, well-ventilated place with a temperature below 20 degrees.

two。 If it is stored in large quantities, the bottom of the urea should be covered with wood at a height of about 20 centimeters, and there should be a gap of more than 50 centimeters between the upper part and the roof to facilitate ventilation and dampness, and an aisle should be left between the stack and the stack. To facilitate inspection and ventilation. If the urea that has been opened is not used up, the mouth of the bag must be sealed in time for use next year.

3. Avoid urea contact with skin and eyes.

Matters needing attention in the use of urea

1. The nature of urea aqueous solution is unstable, and the injection must be dissolved in 10% glucose solution before use, and must be used up within 24 hours to prevent decomposition and release of ammonia, resulting in toxicity. It can not be used for more than 24 hours.

two。 Urea alone has hemolytic effect, it must be diluted with 5% or 10% glucose injection or 10% converted sugar solution, and shall not be diluted with sterilized injection water.

3. Do not spill to the subcutaneous tissue when dripping urea. Spillover should be locally sealed with 0.25% procaine injection and treated with hot compress or 50% magnesium sulfate wet compress.

4. Urea has many shortcomings and is seldom used in clinic.

One of the simplest organic compounds is the main nitrogenous end product of protein metabolism in mammals and some fish. It is also the nitrogen fertilizer with the highest nitrogen content at present.