Preparation process for Penicillium oxalicum fermentation broth and application thereof in agriculture

Abstract

The invention belongs to the technical field of micro-organisms and soil fertilizers. Straw return to fields is a universally concerned agronomic measure for increasing soil fertility and increasing yields and efficiency in the world, both to achieve pollution-free processing of straws, but also to increase the soil fertility. However, if the decomposition of straws in the soil lasts for a long time, large soil void will be caused, to result production problems such as dead seedlings, and freeze injury are prone to generate, and to enable long-term survival of pests in the soil, bringing potential harm to agricultural production. The present invention provides an optimized preparation process for a fermentation broth by using maize straws as a main raw material, and Penicillium oxalicum (Accession No. CGMCCNo.4842) as a seed bacterium; and at the same time provides application methods of the fermentation broth in agricultural production. The fermentation broth can be used to accelerate decomposition of maize straws, and is suitable for straw return to field areas to promote maize straws decomposition and increase the soil fertility.

Description

technical field [0001] The invention belongs to the technical field of microbes and soil fertilizers, and in particular relates to the acquisition of a strain of the genus Penicillium for accelerating the decomposition of corn stalks and the preparation process of its fermented liquid. The invention also relates to an application method of the fermented liquid in agricultural production. technical background [0002] Straw returning to the field is an agronomic measure that is widely concerned in the world today. It not only reduces the air pollution caused by straw burning, but also has the effect of increasing fertilizer and production. Lack of seedlings (stiff seedlings) and other adverse phenomena. At present, there are three main techniques for returning straw to the field: one is direct smashing and returning to the field, the other is returning the straw to the field after composting, and the third is returning the straw to the field after feeding the livestock. Dir...

AI Technical Summary

Problems solved by technology

Direct crushing is the easiest to popularize because it saves manpower and material resources. However, the current situation is that it takes a long time to decompose after straw crushing is directly returned to the field. The soil in the early stage of decomposition is too loose and there are too many large pores, which leads to runaway wind. The seeds cannot be in close contact, which will affect the germination and growth of the seeds, especially in the corn-wheat rotation area. After the corn stalks are crushed in the field and plowed, due to the long decomposition time and other reasons, it often causes the wheat to fail to germinate or hang the roots and die. In winter, it is easy to cause wheat freezing damage, which affects the high and stable yield of wheat; moreover, because the straw cannot decompose for a long time, some pests and pathogenic bacteria can survive in the soil for a long time, which brings potential harm to crop production.