Slow-release compound fertilizer for mechanical transplanting of rice seedlings

Abstract

The invention belongs to the technical field of the production of fertilizers, and discloses a slow-release compound fertilizer for mechanical transplanting of rice seedlings. An envelop slow-release component of the slow-release compound fertilizer comprises the following components in parts by mass: 45-55 parts of resin coated compound fertilizer, 4-10 parts of resin coated diamine, 12-20 parts of resin coated potassium chloride, 10-16 parts of 2-month resin coated urea and 10-16 parts of 3-month resin coated urea. The slow-release compound fertilizer only needs to be applied for one time, the fertilizer supply time is prolonged, and the synchronism of nutrient release and crop nutrient absorption can be realized, so that the release of the fertilizer nutrients can be basically matched with the later-stage nutritional demand of the rice growth. By adopting the slow-release compound fertilizer, the mechanical operation is facilitated, and the labor can be greatly reduced. Compared with a conventional way for applying the fertilizer in multiple times, the compound fertilizer has the advantages that the yield can be increased by about 7.36 percent, and the utilization rate of the nitrogen fertilizer is increased by 33.6 percent.

Description

technical field [0001] The invention belongs to the technical field of fertilizer production, and in particular relates to a slow-release compound fertilizer for machine-transplanting rice. Background technique [0002] my country is a large rice producing country. Based on national food security requirements and high grain yield goals, the amount of chemical fertilizers used in rice production continues to increase. At present, the fertilizers used for rice production in my country are still based on elemental fertilizers such as urea, ammonium bicarbonate, superphosphate or calcium magnesium phosphate fertilizer, and potassium chloride. This kind of fertilizer, especially nitrogen fertilizer, has a fast dissolution rate, short fertilizer effect, and serious fertilizer loss, resulting in low fertilizer utilization rate and serious environmental pollution. Moreover, this type of fertilizer requires multiple fertilization to meet the needs of the target crop throughout the g...

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Problems solved by technology

[0005] The purpose of the present invention is to address the existing slow / controlled release fertilizers in the prior art in that the quantity and speed of fertilizer supply are not synchronized with the needs of crops, which cannot meet the needs of fertilizers in different stages of crop growth and development, and are inconvenient for rice mechanized fertilization operations etc., according to the demand for fertilizers in different stages of rice growth and development, a compound fertilizer prepared by compounding resin-coated compound fertilizer, resin-coated diamine, resin-coated potassium chloride and resin-coated urea with different release rates is provided. Slow-release compound fertilizer suitable for rice machine transplanting. The nutrient release of the fertilizer is synchronized with the nutrient absorption in the later stage of rice growth. Fertilization and transplanting are carried out simultaneously. Tiller fertilizer is applied once, no topdressing is required in the later stage, high nitrogen utilization rate, labor and labor saving

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