Intercropping Fertilizer Blend for Soil Organic Carbon Balance
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Solution Overview
Problem
Maintaining soil organic carbon (SOC) balance is crucial for soil fertility and crop growth, but existing methods often fail to effectively promote SOC balance, leading to issues like soil caking, phytotoxicity, and reduced crop yields in intercropping systems like maize and peanuts.
Innovation Solution
A special fertilizer blend comprising coated urea, double superphosphate, ammonium sulfate, fermented soybean meal, bentonite, sodium molybdate, borax, humic acid, ammonium dihydrogen phosphate, and zinc sulfate heptahydrate, combined with a cultivation method involving plot selection, fertilizing, sowing, field management, and rotation, to optimize nutrient availability and soil structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional fertilizers are used in intercropping systems, then crop growth is supported, but soil organic carbon balance deteriorates leading to soil caking and phytotoxicity
Solution Approach 1:
The patent uses composite fertilizer materials including coated urea (combining nitrogen fertilizer with coating agents), fermented soybean meal (organic matter), bentonite (clay mineral for soil structure), and humic acid (organic compound for soil improvement). This composite approach provides comprehensive nutrition while simultaneously addressing soil structure issues and preventing soil caking and phytotoxicity.
Solution Approach 2:
The patent introduces coated urea where the coating acts as an intermediary between the nitrogen fertilizer and soil. The coating controls nitrogen release rate, preventing rapid nitrogen transformation that causes soil acidification and phytotoxicity, while gradually supplying nitrogen to support crop growth.
2Productivity
If nitrogen fertilizer is applied to support early peanut development, then crop growth is improved, but nutrient loss increases in later stages
Solution Approach 1:
The coated urea provides periodic nitrogen release through its coating structure. The coating gradually degrades or allows controlled diffusion, releasing nitrogen in periodic pulses that match crop growth stages. This ensures nitrogen availability during early peanut development while preventing excessive nitrogen loss in later stages when crop demand decreases.
Solution Approach 2:
The coating on urea is prepared in advance to control the release characteristics. This preliminary action of coating modifies the nitrogen fertilizer properties before application, ensuring that nitrogen is released at the appropriate rate and timing to match crop needs throughout the growth cycle, preventing both deficiency and excess.
3Productivity
If multiple fertilizers are combined to provide comprehensive nutrition, then crop yield increases, but fertilizer formulation complexity increases
Solution Approach 1:
The patent merges multiple fertilizer functions into a single composite formulation. Coated urea combines nitrogen supply with controlled release; fermented soybean meal adds organic matter and slow-release nitrogen; bentonite provides soil structure improvement; humic acid enhances nutrient availability. This merging provides comprehensive nutrition for high yield while simplifying application compared to multiple separate fertilizer applications.
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 fertilizer blend and cultivation method enhance crop growth and development, improve soil organic matter content, and maintain SOC balance, resulting in increased crop yields and improved soil structure, while ensuring stable nutrient levels and efficient resource utilization.
Implementation Method 1
the urea is released and converted with better control under the addition of dicyandiamide
Implementation Method 2
fermented soybean meal
Implementation Method 3
After the dead tissues and wastes are decomposed by microorganisms and the nutrients in them are released
Implementation Method 4
5-10 parts of humic acid
Data Source
AI summary
Disclosed are a special fertilizer for intercropping maize and peanuts and a cultivation method for maintaining soil organic carbon (SOC) balance, belonging to the technical field of SOC balance. The special fertilizer for intercropping maize and peanuts includes the following raw materials: coated urea, heavy superphosphate, ammonium sulfate, fermented soybean meal, bentonite, sodium molybdate, borax, humic acid, ammonium dihydrogen phosphate, plant ash and zinc sulfate heptahydrate. The cultivation method includes the steps of land selection, land preparation, fertilizing, sowing, field management, and rotation.