Method for producing protein feed through mixed strain solid-state fermentation of ginkgo leaf residue

Abstract

The invention relates to a method for producing a protein feed by using gingko leaf residue as a raw material for mixed strain solid-state fermentation. Activation and multiplication culture are respectively performed on candida tropicalis, aspergillus oryzae, bacillus subtilis and lactobacillus plantarum, so as to obtain four liquid strains; after the gingko leaf residue is dried and smashed, a certain amount of water and a nitrogen source are added, and after mixing and sterilizing, the gingko leaf residue is taken as a solid-state fermentation culture medium; the four liquid strains are inoculated to the solid-state fermentation culture medium according to certain proportions, after sufficient mixing, fermentation for 72 to 120 hours can be performed at a nature pH value under the temperature of 28 to 30 DEG C, and after drying, a gingko leaf residue protein feed can be obtained. In the protein feed, the coarse protein content of the protein feed is high and can reach 46 percent, the nutritional ingredients are complete, the palatability is excellent, the production performance and the feed conversion rate of livestock and poultry can be effectively improved, the preparation method is simple in process, the cost is low, and the mass production can be achieved. The invention further provides a way for using the gingko leaf residue which is a waste material in forestry processing.

Description

technical field [0001] The invention belongs to the technical field of agricultural and forestry waste processing and utilization, and in particular relates to a method for producing protein feed by solid-state fermentation of mixed bacteria by using ginkgo biloba residue as raw material. Background technique [0002] With the rapid development of my country's animal husbandry and feed industry, my country's demand for feed raw materials has increased sharply, making my country's feed resources, especially protein resources, more scarce. According to statistics, by 2012, the national supply of protein feed was 22 million tons , the demand is 66 million tons, which shows that the supply of protein feed in my country has been seriously insufficient. On the one hand, there is a lack of protein feed resources in my country. On the other hand, due to the long-term use of antibiotics for feeding, most of the existing feeds have low nutritional value and are not easily digested and ...

AI Technical Summary

Problems solved by technology

These patents all use a single strain of bacteria for fermentation, and the prepared biological feed has problems such as low protein content, single nutrient composition, poor digestion and absorption, and poor palatability.

In the preparation of biological feed from ginkgo leaf residue, only patent 201010295193.x reports that the ginkgo drug residue and straw are sealed with water and then fermented directly. This method does not add any strains for direct fermentation, and the prepared fermented feed has low protein content and low nutritional value. , and this method uses liquid fermentation, which produces a large amount of waste water, which is difficult to handle, high in energy consumption, and pollutes the environment

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