Microbacterium Strain CNCM I-5373 for Nitrogen and Sulfur Mineralization
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Solution Overview
Problem
The intensive use of chemical nitrogen (N) fertilizers in agriculture leads to environmental issues such as water pollution, greenhouse gas emissions, and altered biological diversity, while sulfur (S) deficiencies in crops have emerged due to reduced industrial emissions and changes in fertilizer composition, necessitating improved nutrient availability and efficiency.
Innovation Solution
A biofertilizing bacterial strain, deposited under the Budapest Treaty as CNCM I-5373, affiliated with the genus Microbacterium, is used to enhance soil microbial activities, increase the availability of mineral nutrients like N and S, and promote plant growth by stimulating enzymatic activities and root development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical nitrogen fertilizers are intensively used to increase agricultural production, then crop yield is improved, but environmental pollution and loss of nutrients occur
Solution Approach 1:
The bacterial strain performs nitrogen mineralization and sulfur solubilization autonomously through its metabolic activities, converting organic nutrients into plant-available forms without requiring external chemical inputs. The bacteria utilize organic matter in the soil as substrate, performing the fertilizing function themselves rather than relying on applied chemical fertilizers that are prone to loss.
Solution Approach 2:
The invention changes the chemical form of nutrients from synthetic chemical fertilizers to microbially-produced mineral forms. The bacterial strain transforms organic nitrogen into ammonium and nitrate, and solubilizes organic sulfur into sulfate, providing nutrients in forms that are more readily absorbed by plants and less prone to environmental loss.
2Quantity of substance
If chemical fertilizers are used to improve nutrient availability, then plant growth is enhanced, but biological diversity and ecosystem functioning are altered
Solution Approach 1:
The invention replaces the mechanical/chemical approach of applying synthetic fertilizers with a biological approach using microorganism-mediated nutrient transformation. Instead of directly adding chemical nitrogen and sulfur compounds, the bacterial strain is used to biologically mineralize organic matter and release nutrients, substituting chemical fertilization with a biological process that integrates better with ecosystem functions.
Solution Approach 2:
The bacterial strain acts as an intermediary between organic matter and plant uptake. Rather than directly applying inorganic fertilizers that can cause ecological disruption, the bacteria serve as a mediating agent that converts organic nutrients into plant-available forms through enzymatic processes, thereby bridging the gap between soil organic matter and plant nutrition while maintaining ecosystem balance.
3Object-affected harmful factors
If industrial emissions are reduced to improve environmental quality, then atmospheric pollution decreases, but sulfur deficiencies in crops appear
Solution Approach 1:
The bacterial strain autonomously solubilizes organic sulfur compounds present in the soil, converting them into sulfate forms that are readily absorbed by plants. This self-service capability allows the bacteria to provide sulfur nutrition to crops without requiring external sulfur fertilizer applications or relying on atmospheric sulfur deposition that is being reduced for environmental reasons.
Solution Approach 2:
The invention changes the availability parameter of sulfur in the soil by using bacterial enzymes to solubilize organic sulfur compounds. The bacterial strain produces sulfatases and other enzymes that break down organic sulfur esters and release sulfate, thereby changing the chemical form and availability of sulfur from unavailable organic compounds to plant-absorbable sulfate, compensating for reduced atmospheric sulfur inputs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The bacterial strain significantly increases enzymatic activities related to N and S mineralization, enhances root biomass, and improves the capture of soil minerals by plants, thereby addressing the inefficiencies and environmental impacts associated with chemical fertilizers.
Implementation Method 1
more than 90% of N and S in soils are in organic forms that must be transformed by soil microorganisms (process of decomposition and mineralization of organic matter) to release mineral forms accessible to plants
Implementation Method 2
The inventors have demonstrated in particular that the inoculation of the bacterial strain according to the invention significantly increased the enzymatic activities of the soil involved in the decomposition and mineralization of N and S
Data Source
AI summary
The present invention relates to the field of crop fertilization, and particularly to a biofertilizing bacterial strain. In particular, the present invention relates to the bacterial strain deposited on Oct. 24, 2018, at the Collection Nationale de Culture de Microorganismes (CNCM), 28 rue du Dr. Roux, 75724 PARIS CEDEX 15, under the Budapest Treaty under number CNCM I-5373, and to the uses of this strain. The invention also relates to a composition comprising the above-mentioned bacterial strain and to a fertilization process comprising the application of this composition to a plant or to a soil.