Fish protein fertilizer capable of promoting growth of plants and preparation method of fish protein fertilizer

Abstract

The invention discloses a fish protein fertilizer capable of promoting the growth of plants and a preparation method of the fish protein fertilizer. The fish protein fertilizer comprises the followingcomponents in parts by weight: 65-85 parts of fish proteins, 4-6 parts of methionine, 3-5 parts of tryptophan and 15-20 parts of modified chitosan. The preparation method of the fish protein fertilizer comprises the steps: firstly, adding methionine and tryptophan into the fish proteins so as to be premixed, and carrying out grinding and sieving to obtain protein powder with uniform particle size; secondly, adding the protein powder into a ball mill, adding water serving as a medium water and modified chitosan, and adsorbing the protein powder into the modified chitosan by mechanical mixing to obtain a wet product of the fish protein fertilizer; and thirdly, placing the wet product of the fish protein fertilizer into a vacuum drying oven, and carrying out drying to obtain a finished product of the fish protein fertilizer. The prepared fish protein fertilizer is free of salts and heavy metal residues, high in nitrogen content, good in water solubility and long in shelf life, can be widely applied to operation of fertilizer application to leaves and root systems of plants and plays a role in actively promoting the growth of crops.

Description

technical field [0001] The invention belongs to the technical field of organic fertilizer production, and in particular relates to a fish protein fertilizer capable of promoting plant growth and a preparation method thereof. Background technique [0002] The addition of traditional chemical fertilizers directly improves the availability and content of plant nutrients in the soil, which is conducive to the rapid growth of crops and enables them to have a strong root system, thereby increasing the number and activity of microorganisms in the rhizosphere. However, while the long-term use of chemical fertilizers increases crop yields, it also poses a severe test to the soil environment, threatening the sustainability of my country's agricultural development, especially in the case of single nitrogen fertilizer and unbalanced fertilization, which can promote soil nitrogen oxide emissions , nitrate runoff, and more seriously, it can also reduce the activity of soil microorganisms a...

AI Technical Summary

Problems solved by technology

However, the fish waste has high salt content, and heavy metals and drug residues are difficult to control. Although fish protein fertilizers are sold on the market, the processes used in these products are basically simple cooking, enzymatic hydrolysis, and separation. The content of oil and heavy metals is high, and it has a strong fishy smell. The nitrogen content of the product is low, especially the quality of the product is difficult to preserve. It is necessary to add acidic substances to adjust its pH value to about 4.0 in order to preserve the quality.

In this way, the product has been out of the category of organic fertilizer, and its use in the development of green and organic agriculture is limited