Multi-Strain Microbial Agent for Legume Root Nodule Induction
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Solution Overview
Problem
Current microbial fertilizers are ineffective in promoting a significant increase in root nodule number and nitrogenase activity in leguminous crops, leading to low biological nitrogen fixation efficiency and soil fertility issues, despite their potential for sustainable agriculture.
Innovation Solution
A microbial agent composed of four strains - Bacillus amyloliquefaciens, Brevibacillus laterosporu, Bacillus mucilaginosus, and Enterobacter ludwigii - isolated from peanut pods and rhizospheres, formulated into a live bacterial granule or powder, is applied to enhance root nodule formation and nitrogenase activity, using a carrier with humic acid, tapioca flour, and bentonite binder, and applied at the sowing stage to induce supernodulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional microbial fertilizers are applied, then soil fertility improvement is intended, but root nodule number and nitrogenase activity increase is insufficient
Solution Approach 1:
The patent combines four different bacterial strains (Bacillus amyloliquefaciens, Brevibacillus laterosporus, Bacillus mucilaginosus, and Enterobacter ludwigii) into a single microbial agent formulation. This multi-strain combination synergistically enhances both root nodule formation and nitrogenase activity, resolving the contradiction between reliable nitrogen fixation and high productivity in nodulation.
Solution Approach 2:
The microbial agent uses a composite carrier system containing humic acid, tapioca flour, and bentonite binder. This composite material structure provides optimal conditions for bacterial survival and activity, enabling significant increases in both root nodule number and nitrogen fixation efficiency simultaneously.
2Productivity
If chemical fertilizers are used excessively, then crop growth is promoted, but soil hardening and nutrient imbalance occur
Solution Approach 1:
The patent shifts the nutrient supply paradigm from chemical fertilizers to biological nitrogen fixation. By enhancing root nodule number and nitrogenase activity through the microbial agent, the system changes the source and mechanism of nitrogen supply, promoting crop growth while avoiding soil hardening and nutrient imbalance associated with excessive chemical fertilizer use.
Solution Approach 2:
The microbial agent enables crops to fix atmospheric nitrogen independently through enhanced symbiotic nitrogen fixation. This self-service mechanism reduces dependency on external chemical inputs, allowing sustained crop growth without the harmful effects of chemical fertilizer accumulation in soil.
3Object-affected harmful factors
If microbial fertilizers are applied, then environmental pollution reduction is intended, but nodulation effect is not significant
Solution Approach 1:
The specialized composite carrier (humic acid, tapioca flour, bentonite) provides optimal protection and activation conditions for the bacterial strains, ensuring high nodulation effectiveness. This composite structure resolves the contradiction by maintaining bacterial viability and activity without requiring chemical fertilizers, thus reducing pollution while achieving significant nodulation effects.
Solution Approach 2:
The synergistic combination of four bacterial strains creates a robust microbial agent that reliably induces nodulation while maintaining environmental sustainability. This multi-strain approach ensures consistent and significant nodulation effects without the environmental harm associated with chemical alternatives.
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 microbial agent significantly increases root nodule number and nitrogenase activity, improving nitrogen fixation, crop growth, chlorophyll content, and biomass, while reducing chemical fertilizer use and environmental pollution, offering economic and ecological benefits.
Implementation Method 1
The rhizobia colonize and reproduce in large quantities in the root nodules, forms many spherical bacteroids at a certain period, and performs biological nitrogen fixation by the action of nitrogenase, converting nitrogen in the air into a nitrogen fertilizer
Implementation Method 2
using a carrier with humic acid, tapioca flour, and bentonite binder
Data Source
AI summary
The present disclosure belongs to the field of microbial technology, and in particular relates to a microbial agent for promoting root nodule number increase and root nodule nitrogenase activity increase in leguminous crops and use thereof. The microbial agent is compounded from 4 microbes including Bacillus amyloliquefaciens, Brevibacillus laterosporu, Bacillus mucilaginosus Krassilnikov, and Enterobacter ludwigii by separate fermentative cultivation, concentration and mixing. The microbial agent can effectively promote root nodule number increase and root nodule nitrogenase activity increase, promote crop growth, and improve crop yield and product quality.