Selenium-containing slow-release fertilizer for tomatoes

Abstract

The present invention discloses selenium-containing slow-release fertilizer for tomatoes. A biodegradable polyester film layer is the inner layer of a coating film, and the biodegradable polyester film layer comprises the following raw material components in parts by weight: 15-20 parts of weathered coal powder, 0.6-0.8 part of ammonium bicarbonate and 23-26 parts of urea. The mass fraction of selenium chloride in a polymer selenium-containing mixture film layer is in gradient distribution; a closed surface, of which the mass fraction of selenium chloride is 90-99.9%, surrounding fertilizer granules exists; and the polymer selenium-containing mixture film layer comprises the following raw material components in parts by weight: 5-8 parts of zinc ethylene diaminetetraacetic acid, 5-7 parts of potassium citrate and 20-30 parts of biochemical fulvic acid. The mass fraction of sulfur in the polymer selenium-containing mixture film layer is in gradient distribution. The impact resistance of the coating film is good. Organic-inorganic compound fertilizer with high contents of active components, quick and balanced fertilizer effects, durable efficacy and wide effects is prepared; and the fertilizer is good in environment-friendliness.

Description

technical field [0001] The invention belongs to the field of chemical fertilizer industry, and in particular relates to a tomato selenium-containing slow-release chemical fertilizer. Background technique [0002] Tomato (Tomato) is also known as tomato and foreign persimmon. In Peru and Mexico, it was originally called "wolf peach". The fruit is rich in nutrition and has a special flavor. It has the effects of losing weight, eliminating fatigue, increasing appetite, improving protein digestion, and reducing bloating and food accumulation. When eating tomato diet to lose weight, tomato (tomato) is a herb with ripe juicy berries as its product. Every 100 grams of fresh fruit contains about 94 grams of water, 2.5-3.8 grams of carbohydrates, 0.6-1.2 grams of protein, 20-30 mg of vitamin C, and carotene, mineral salts, organic acids, etc. Usually there are broadcast, row and on-demand. Immediately after sowing, the soil should be covered with sieved fine soil. The thickness...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the coatings of slow-release chemical fertilizer products cannot be degraded or cannot be completely degraded. For example, coatings such as epoxy resin, polyurethane, polyethylene, polypropylene, and polyvinyl chloride will remain in the soil and pollute the environment. Release fertilizer is a problem to be solved in the field of coated slow release fertilizer

However, slow-release chemical fertilizers with fully degradable coatings cannot be practically applied to common agricultural crops due to their high cost or short release period. Therefore, slow-release chemical fertilizers with fully degradable coatings have not been well resolved. question