1、Performance of phosphogypsum and calcium magnesium phosphate fertilizer
These two additives could also improve the compost maturity and quality. This study investigated the performance of phosphogypsum and calcium magnesium phosphate fertilizer for nitrogen conservation during pig manure composting with cornstalk as the bulking agent.
2、RAR 34
Our objective has been to determine the effect of farmyard manure as well as composted municipal waste and sewage sludge on the content of Mg and Ca in crops and on the removal of these elements from the soil by the harvested biomass.
3、Compost and Farmyard Manure
The qualities of composts, however, differ considerably from product to product, because different kinds of raw materials are used besides animal feces and various methods of compost preparation are adopted.
4、Phosphate, magnesium containing additives and biochar regulate compost
Composting technology represents a significant approach for managing livestock and poultry manure, involving a complex biological process wherein biodegradable organic waste is transformed into stable, humus-rich products through microbial activity (Lei et al., 2021).
5、Transformation characteristics of organic matter and phosphorus in
Composting is an effective way to treat agricultural waste and further produce organic fertilizer, achieving waste minimization and stabilization.
A comprehensive review on agricultural waste utilization through
The combined composting of straw with cattle manure and farmyard manure significantly increases the NaHCO 3 extractable P content by 32.3 and 23.5 %, respectively (Gaind, 2014).
(PDF) Enrichment of Organic Manures and Their
Traditionally farmyard manure, animal wastes, compost, vermicompost are used as source of organic fertilizers for improving soil fertility and crop productivity.
Manure Management and Composting
Organic farmers rarely apply raw manure to their fields; they use composted manure. The composting process imitates the decomposition of organic matter on the surface layer of the soil to turn raw manure into humus.
Sustainable Manure and Compost Application: Garden and Micro Farm
However, knowing how much and when to apply manure is critical for long-term soil heath. This fact sheet provides general information on manure and compost characteristics and a step-by-step example for calculating application rates that are appropriate for gardens and micro farms (<5 acres).
IMPROVING PHOSPHORUS AVAILABILITY, NUTRIENT UPTAKE AND DRY MATTER
Besides increasing the availability of nitrogen, potassium, calcium and magnesium in soil, organic amendments improved nutrients uptake and dry matter production of Zea mays L. Biochar and compost can be used to improve the productivity of Zea mays L. on acid soils by reducing phosphorus fixation.
Farmyard manure is a traditional organic fertilizer primarily composed of animal and plant residues, feces, and other organic matter undergoing microbial decomposition and stabilization. Calcium, magnesium, and phosphorus are common nutrients in farmyard manure, playing critical roles in plant growth and soil nutrient supply. To enhance the content and utilization efficiency of these minerals, composting treatments are essential. Below are several methods for composting farmyard manure with added calcium, magnesium, and phosphorus:
1. Composting Method
Composting is a conventional approach, involving mixing farmyard manure with organic materials like straw or leaves and piling them for fermentation. During this process, microorganisms break down organic matter into humus and beneficial substances while releasing minerals such as calcium, magnesium, and phosphorus. This method is simple and cost-effective but requires longer composting time and is susceptible to environmental factors.
2. High-Temperature Composting Method
This method introduces thermophilic microbial agents to accelerate fermentation at elevated temperatures. The high temperature boosts microbial activity, speeding up organic matter decomposition and mineral release. While it improves compost quality and speed, it involves higher complexity and costs.
3. Anaerobic Fermentation Method
Under oxygen-free conditions, anaerobic microorganisms decompose organic matter. This approach enhances the breakdown of recalcitrant compounds and mineral release. Although it improves mineral absorption, strict operational conditions and specialized equipment are required.
4. Bio-Agent Addition Method
Specific microbial agents are added to expedite organic matter decomposition and mineral release. These agents secrete enzymes to accelerate breakdown and promote mineral dissolution. Simple and affordable, its effectiveness depends on the type and concentration of microbial agents used.
5. Lime Conditioning Method
Adding lime (calcium hydroxide) adjusts acidity, creating optimal conditions for microbial activity. Lime neutralizes acidic substances, stabilizes pH, and reacts with organic matter to form humus. Cost-effective and easy to apply, excessive lime may lead to soil acidification if not dosed properly.
6. Phosphate Addition Method
Incorporating phosphates (e.g., potassium dihydrogen phosphate, ammonium hydrogen phosphate) provides a phosphorus source to stimulate microbial activity and organic matter decomposition. Phosphates react with organic matter to form soluble compounds, enhancing mineral absorption. While simple and inexpensive, overuse may cause soil acidification.
Various methods exist for composting farmyard manure with added calcium, magnesium, and phosphorus. The choice depends on specific needs, considering factors like temperature, humidity, and pH control. Careful use of chemicals or bio-agents is critical to avoid environmental or crop damage. Prioritizing proper techniques ensures high-quality compost and sustainable agricultural practices.
