In the production of water, many people mistakenly believe that manure, especially pig manure, can be directly applied to the water, and can be used as a bait by omnivorous fish such as squid. In practice, this practice was carried out in the past. The age of low fish is still acceptable, but for the current high level of intensive farming and the serious spread of fish disease, the disadvantages are far greater than the benefits.
Therefore, for fish ponds with relatively high density of culture, in order to ensure healthy aquaculture, we advocate the anaerobic fermentation of manure for the use of manure fertilizer 99 or the aerobic composting fermentation of composting fast decomposing agent to make it fully decomposed. It is then applied according to the water color of the pond. This is because:
1. The role and purpose of fermentation and maturity
1.1 Manure is a complex organic matter with a high biological oxygen demand BOD, which is directly applied to the water body, which is carried out during the mineralization and decomposition process, and the oxygen consumption is too large. Root research, the full mineralization of 1 ton of manure into inorganic salts consumes 3.5 tons of oxygen, and 1 mu of water surface 2 meters of water deep dissolved oxygen sufficient total dissolved oxygen does not exceed 7 kg, which shows that the decomposition process of manure decomposition of ponds The extent of the serious impact. Unless your water surface is large enough to use the self-purifying ability of the water to consume them, do not choose the method of direct application of manure;
Direct application to the water body will consume a large amount of oxygen in the local water body in a large amount and in a short time, resulting in lack of oxygen, causing nitrite increase and denitrification loss. Therefore, animal manure is preferably pre-fertilized on the shore. After treatment, the complex organic matter becomes a simple organic substance. Although it needs to continue to decompose oxygen consumption in the water body, the main oxygen consumption process is completed in the pre-fermentation process, and the impact on water quality is much less. It is.
1.2 Manure often contains a variety of pathogenic bacteria, such as herbivore cattle, sheep, rabbit feces contain a large number of sticky bacteria. By fermentation, the pathogens therein can be effectively killed.
2. Method of fermentation
Introduce the following two fermentation methods:
1 anaerobic fermentation in the septic tank for more than 25 days using vigor 99 raw yeast (1 pack of vigor 99 yeast fermented 1 cubic meter);
2 or using composting rapid decomposing agent for fermentation and fermentation, using a layer of straw material + a layer of faecal material + a mixture of fermentation agents for fermentation, the ratio of faecal material to straw material is about 1 to 0.4, a package of composting fast decomposing agent Fermenting 1 ton of such organic materials, composting fast decomposing agent is premixed with 5 kg of rice bran or wheat bran or corn flour to prepare a mixture of starter, and sprinkle it into each layer according to the above method, each auxiliary layer, Need to add enough water, the material is in a semi-solid state, and then use the mud to seal the fermentation or simply cover the plastic film; the fermentation container can be used in the pond, soil pit (lined with plastic film to prevent water loss); fermentation can be matured in about 10 days When used, after being soaked in water, the fertilizer is applied to the fish pond. The remaining slag can be used as a crop plant fertilizer.
Therefore, when using compost fast decomposing agent, it is recommended to build the Dianchi soil pit on the bank upstream of the reservoir to facilitate the washing of fertilizer water into the reservoir, or to build it on the slope in a stepped manner, or to flood into a pool with rising water. In the water.
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