How to ferment rapeseed cake
1, mixed probiotics
If you want to ferment the rapeseed cake into fertilizer, you should first crush it with a wooden stick or a machine, then add probiotics and clean water to make the rapeseed cake in a loose state, then pile the mixed rapeseed cake in an open space, cover it with a film, and open it for one day after one week.
2, sealed fermentation
Fermented rapeseed cake can be sealed. Mix the crushed rapeseed cake with clean water at the ratio of 2: 1, then add yeast powder, stir it into paste, pile it up in the open air, and then wrap it with mud and seal it. After six months, the fermentation can be completed.
3. Pit fermentation
In the process of fermenting rapeseed cake, rapeseed cake can be crushed, mixed with pastoral soil rich in organic matter at the ratio of 1:3, then mixed with water, stirred into paste, then poured into a soil pit and covered with a cover or film. After four months, the color of rapeseed cake darkened and smelled bad, indicating that the fermentation was successful.
Matters needing attention in the fermentation of rapeseed cake;
1, material moisture control
When using Gymboree fertilizer starter, the first problem is to control the moisture of the material. When saving water, the oil content of rapeseed cake should be adjusted evenly and the water content of rapeseed cake should be adjusted to 60-65%. The identification method is to grasp your fingers and see that water does not drip, and always pay attention to the moisture of the material after starting fermentation.
2, the initial pile insulation method
Due to the low temperature in some areas in winter, the normal activity and reproduction temperature of microorganisms should be above 5 degrees Celsius. For example, the temperature in Northeast China and Inner Mongolia is generally below zero. When the rapeseed cake is fermented, a fermentation pile can be built indoors or in a greenhouse if conditions permit, and a temporary heat preservation shed can be built if conditions permit, and a wind-proof heat preservation shed can be built around the plastic sheet.
3. Heat preservation method in the middle period of fermentation
After the pile is built, it needs to be covered with straw curtains, straw and field soil. Increase the insulation of the pile around the fermentation pile. Do not cover the fermentation pile with plastic sheets. Because the rapeseed cake fermented by Gymboree fertilizer starter is aerobic fermentation, oxygen is needed in the fermentation process, so it is best to cover the insulation material with materials with good permeability such as straw, straw curtain and field soil.