Chemical fertilizer | the crime and punishment of chicken dung?

[introduction]

Once upon a time, chicken manure became the best choice for organic fertilizer because of its rich nutrients, but in recent years, it has been found that various problems caused by the application of chicken manure can not be ignored.

According to research, the content of organic matter in fresh chicken manure is about 25.5%. In addition, it also contains a large number of elements needed by crops.

It is determined that chicken manure contains 2.38% nitrogen, 2.65% phosphorus, 1.76% potassium and 0.46% magnesium oxide.

100 kilograms of chicken manure is equivalent to 3.5 kilograms of urea, 8.2 kilograms of calcium superphosphate and 3.4 kilograms of potassium sulfate. At the same time, fertilizer is more effective than ordinary organic fertilizer, which is deeply liked by the majority of growers.

In fact, the organic fertilizer based on chicken manure is also very common abroad, but the process of making it into organic fertilizer needs to go through about 6 times of fermentation. Most of the planting bases in China are basically simple fermentation.

The use of chicken manure must be mature.

In recent years, because the treatment is too simple, the application of chicken manure has also brought a lot of side effects.

Through the investigation, it is found that the continuous use directly applied to the fruit and vegetable base without full fermentation or ripening brings great harm to the large base:

First, burning roots, seedlings, smoked trees, dead plants

Serious piece or full shed death, delay farming hours, the loss of labor fees and seedling investment. Especially in winter and spring, the biggest hidden danger is the application of chicken manure in the greenhouse.

Second, salinized the soil in the shed, the fruit does not open.

Chicken manure is used in successive years, and there is a large amount of sodium chloride in the soil, with an average salt content of 30-40 kg per 6 square chicken manure.

However, the content of 10 kg salt per mu has seriously restricted soil permeability and activity, solidified phosphate fertilizer, potassium fertilizer, calcium, magnesium, zinc, iron, boron and manganese and other important elements, resulting in abnormal plant growth, sparse buds, no fruit and other reduced yield. it significantly restricted the improvement of crop yield and quality.

Soil salinization seriously restricts soil permeability and activity.

As a result, fertilizer use efficiency plummeted, year after year, increasing input costs by 50-100%.

(3) breeding a large number of root-knot nematodes

Chicken manure is the camp and hotbed of root-knot nematodes, and the number of eggs carried by root-knot nematodes is 1000 grams.

The nematode eggs in chicken manure were easy to hatch, which increased by tens of thousands overnight, and the incidence of nematodes in soil increased by more than 500 times in plots with chicken manure.

Uncooked chicken manure will also lead to a large number of root-knot nematodes.

Fourth, induce various rhizosphere diseases and virus diseases.

Chicken manure caused the imbalance of carbon-nitrogen ratio in the plant, aggravated the soil salinization, and caused chemical trauma and serious damage to the stem base and root tissue.

At the same time, it also provides an entrance and infection opportunity for a large number of viruses, soil-borne bacteria and viruses. Once the humidity and temperature reach the critical point, the disease will break out.

Cause plant wilting, yellow wilt, atrophy not long, no flower, no fruit, or even death; virus disease, blight, stem rot, root rot, bacterial wilt become the most obvious sequelae of the use of chicken manure

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