Chicken manure: uses, benefits, and recommendations for fertilizing with chicken manure

Chicken manure is one of the most valued organic fertilizers for its powerful contribution of nutrients and its ability to improve soil structure and fertility.. Coming from the poultry industry and small domestic farms, its efficient and safe use promotes more sustainable and environmentally friendly agriculture.

What is chicken manure and how is it different from chicken droppings?

Chicken manure It is composed mainly of the excrement of laying hens, mixed with feather remains, food waste and, occasionally, bedding materials. On the other hand, chickadee It comes from birds intended for fattening, also accompanied by feathers, waste and the bedding used in breeding.

• Chicken manure: Accumulated excrement from laying hens, along with feathers and food remains.
• Chicken manure: Poultry manure mixed with feathers, waste and bedding materials.

This distinction is key, since the composition and use They vary depending on the origin of the manure, influencing its agricultural application and the management required for its use.

Composition and nutrients of chicken manure

Chicken manure is a fertilizer of high agronomic value due to its balanced composition of macronutrients and micronutrients, as well as its contribution of organic matter.

• Nitrogen (N): Between 1,5% and 3,5%, essential for vigorous vegetative growth.
• Phosphorus (P): 1% to 3%, key in root development and flowering.
• Potassium (K): 0,8% to 2%, improves pest resistance and water regulation.
• Ca, Mg, S, Fe: Calcium, magnesium, sulfur and iron, important for essential biochemical processes.
• Organic material: Between 20% and 80%, increasing the water retention capacity and soil aeration.

Its pH typically ranges between 6,5 and 8, making it suitable for most agricultural soils. This composition can vary depending on the age of the birds, their diet, the management system, and storage conditions.

Factors influencing the quality and quantity of chicken manure

The nutritional quality and volume of chicken manure depend on a number of interrelated factors:

• age of the bird: Larger birds produce more droppings and a higher concentration of nutrients.
• Diet and production lineA nutrient-balanced diet is directly reflected in the quality of the resulting fertilizer.
• Food consumption and waste: The amount of feed consumed and the waste that ends up in the litter increase the nutrient content (especially nitrogen) in the chicken manure.
• Presence of feathersFeathers are rich in keratin, a protein that adds nitrogen to compost.
• Environmental conditions: High temperature and humidity contribute to increased ammonia production and decreased nutrient retention.
• Ventilation: Good airflow reduces nitrogen loss through volatilization.

Therefore, it is advisable to carry out a Laboratory analysis Before applying chicken manure, to know its exact composition and define the appropriate application dose, avoiding risks of toxicity due to the accumulation of salts or heavy metals.

Benefits of chicken manure in agricultural fertilization

• Contribution of NPK nutrients and micronutrients: Allows healthy development of plants with strong roots, vigorous stems and greater production of fruits and flowers.
• It improves soil structure: Increases porosity, water retention and reduces erosion.
• Stimulation of microbial life: Promotes the decomposition of organic matter, improving the bioavailability of nutrients for plants and soil health.
• Sustainability: It allows reducing the use of synthetic fertilizers, promoting more ecological agriculture.
• Balances pH in acidic soils: Its neutral or slightly alkaline pH helps neutralize overly acidic soils, improving nutrient absorption.
• Inoculation of beneficial microorganisms: Coming from the digestive system of birds, they accelerate composting processes and improve soil health.
• Increases carbon and organic matter content: Improves water retention capacity and long-term fertility.

Precautions and disadvantages in the use of chicken manure

• Risk of excess nutrients: Its high nitrogen concentration can cause burns on roots and leaves, or excessive leaf development to the detriment of fruit. It is essential to adjust the dose and compost beforehand chicken manure to stabilize nutrients.
• Ammonia and toxicityFresh manure contains ammonia, which can be phytotoxic if applied directly. Composting reduces volatilization and associated risks.
• Presence of waste and contaminants: Chicken manure from factory farms may contain antibiotics and additives. If you purchase it, it is best to look for certified and ecological compost.
• Pathogens and weed seedsThey are present in fresh manure; proper composting eliminates most of them.

Signs of excess chicken manure on the ground:

• Excessive leaf growth with short lifespan.
• Yellow or brown coloration of the foliage.
• Formation of superficial crusts, bad odor, or presence of mold.
• Weak plants and uneven growth.

How to properly compost chicken manure

Composting is the essential process for converting chicken manure into a safe and efficient fertilizer.. It prevents phytotoxicity and plant health problems, and also reduces unpleasant odors.

1. Collect manure mixed with straw, leaves, or sawdust to balance moisture and carbon content.
2. Form a pile of about 1 m³ to ensure sufficient internal temperature.
3. Turn the pile every 1-2 weeks to oxygenate it and prevent the formation of harmful gases.
4. The process can take between 2 and 3 months, depending on temperature and humidity.
5. The compost is ready when it acquires a dark brown color, a smooth texture, and a fresh earthy smell. It can be left to cure for an additional two weeks before applying to the field.

Related article:

Properties of chicken manure: benefits, composition, and effective use in orchards and gardens

Application recommendations according to the type of crop

• Adult fruit trees: 2 to 5 kg of composted chicken manure per tree, in two annual applications. For young trees, the dose is reduced to a maximum of 1 kg.
• Vegetables: 0,5 to 1 kg per square meter of crop, applied two or three weeks before sowing to prepare the soil.

Comparison: chicken manure versus other manures

Chicken manure is superior to other manures due to its high concentration of nutrients and organic matter., although it should be used with more caution:

• Cow dung: Lower nutritional intake, useful for improving structure and water retention.
• Horse manure: Promotes aeration in compact soils, but often contains weed seeds.
• Sheep and rabbit manure: More concentrated, ideal for dry soils and direct applications, respectively.

Special features and sustainable management

Chicken manure contains up to 39% total organic carbon, high levels of calcium (4,75%) and magnesium (0,55%), and a C/N ratio of 12,3. These values position it as a fast-release fertilizer with long-lasting positive effects on the soil. To avoid nitrogen loss, it is recommended to dry chicken manure in the shade.

To achieve responsible use, it is recommended to integrate chicken manure into circular economy systems, recirculating nutrients between poultry and agricultural production and reducing dependence on synthetic fertilizers.

Opt for the chicken manure as organic fertilizer It is one of the most sustainable and effective options for improving soil fertility and health, increasing crop yields, and conserving soil biodiversity. Thanks to its high nutrient content and its role in soil structure, chicken manure is an essential resource in organic and conventional agriculture. By applying good management and composting practices, it becomes an effective tool for agricultural regeneration and healthy food production.