How to use chicken droppings in river crab ponds

Chicken manure is a kind of organic fertilizer with comprehensive nutrition and high protein content. It is also rich in trace elements such as nitrogen, phosphorus, potassium, copper, iron, zinc and manganese. Chicken manure is used as fertilizer, fertilizer, and water for fish culture. It was once to reduce production costs. One of the effective ways. Chicken manure was not widely used in crab culture before. However, due to the low price of crabs in 2011, many of the crab farmers started to use large quantities of chicken manure instead of bio-fertilizer to make water this year because of lower production costs. The disadvantages of manure fish have already begun to show up in river crabs. For example, the use of chicken manure in crab ponds will make the ammonia in the pool water excessively high, and the serious water color will turn black; it will easily lead to the lack of oxygen in the bottom of the pool water, and the nitrite will be high; regular use of crab pond organic matter will occur. Increased risk of crabs becoming ill; imbalances in nutrients and unstable water quality are likely to occur. Based on the above drawbacks, when using chicken manure, the following measures can be taken to solve:

1. Chicken manure must be fully fermented before application. After sufficient decomposing, parasites and their eggs in chicken manure and some infectious bacteria are inactivated by decomposing (tanning).

2. When using chicken manure in river crab ponds, it is best to use it as a base fertilizer when it is used at low temperature. When high temperature is used, the amount must be small, otherwise it is easy to spoil the water quality.

3. Chicken feces can be used with beneficial bacteria, beneficial bacteria can absorb ammonia nitrogen, transform nitrite, change the algae phase, decompose organic matter and release nutrients, etc.; can also be used with inorganic fertilizers, make full use of various nutrients, make various Nutrition can maintain a balance, promote the healthy growth of plankton, and at the same time, it can make the algae phase very good, and the water can be “fat, live, tender and cool” for a long time.

4. Long-term use of chicken manure, the pool water is easy to be acidic, you must use quicklime to regulate the water quality, or add lime during the chicken manure fermentation process, this will not only play a role in preventing disease, but also regulate the purification of water quality, promote healthy growth of crabs .

5. It is forbidden to use the crab when it is onset, because a large amount of organic matter can cause the bacteria to adhere and reproduce rapidly, so that the pathogenic bacteria can be rapidly spread, thus making the disease worse.

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