Cellulose Starch Polymer Carrier for Controlled Nutrient Release
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Solution Overview
Problem
Conventional fertilizers lead to nutrient leaching, trace metal depletion, and toxicity issues in soils, limiting crop yields and causing environmental harm due to water solubility and improper bioavailability of micronutrients.
Innovation Solution
A composition comprising a polymeric carrier of cellulose and/or starch, insoluble in water, combined with micronutrients like Fe, Mn, Zn, and Cu, which are partially soluble, allowing for controlled release based on biological demand, minimizing leaching and toxicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If water-soluble nutrients are applied to soils, then plant growth is promoted, but nutrient leaching increases and environmental harm occurs
Solution Approach 1:
An insoluble polymeric carrier acts as an intermediary between water-soluble nutrients and the soil environment. The carrier binds nutrients through adsorption or complexation, enabling controlled release while preventing leaching. This mediator allows nutrients to be transported and delivered to plants without being washed away by irrigation or rain.
Solution Approach 2:
The solubility parameter of nutrients is changed by binding them to an insoluble polymeric carrier. Instead of applying highly water-soluble nutrients that leach easily, the invention uses nutrients with controlled solubility through polymer binding, releasing them gradually in response to biological demand or environmental conditions while maintaining low leaching potential.
2Reliability
If trace metals are applied to soils, then trace metal deficiency is mitigated, but toxicity occurs in high local concentrations
Solution Approach 1:
The polymeric carrier creates localized zones of controlled trace metal concentration at the carrier surface or within the polymer matrix. This ensures that high concentrations of trace metals are contained within the insoluble carrier structure rather than being dispersed in soil solution, preventing toxic effects on plants while maintaining bioavailability through controlled release.
Solution Approach 2:
The insoluble polymeric carrier serves as a mediator that buffers trace metal concentrations. It binds trace metals in a controlled manner, releasing them gradually to plants through biological demand or environmental triggers, thereby preventing both deficiency and toxicity conditions.
3Adaptability or versatility
If free trace metals are present in cationic form, then they are available for interaction, but they bind tightly to soil organic chelates and become unavailable to plants and microbiome
Solution Approach 1:
The polymeric carrier acts as an intermediary that presents trace metals in a form that is both interactive and bioavailable. The carrier material itself (such as cellulose or starch-based polymers) provides functional groups that can interact with trace metals while simultaneously making them accessible to plants and soil microbiome through controlled release mechanisms.
Solution Approach 2:
The invention creates a composite material system combining the polymeric carrier with trace metals. This composite structure provides both the interaction capability of the polymer functional groups and the bioavailability needed for plant and microbiome uptake, overcoming the limitation of free cationic metals that bind too tightly to soil organic matter.
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 composition effectively retains nutrients, enhances bioavailability, and reduces environmental impact by maintaining nutrient levels in soils, promoting healthier crop growth and minimizing environmental harm.
Implementation Method 1
a composition comprising a polymeric carrier comprising cellulose and/or starch, wherein the carrier is insoluble in water; and an element
Implementation Method 2
an element, wherein a salt of the element is soluble or partially soluble in water, wherein the composition comprises at least about 5% (wt/wt) of the element
Data Source
AI summary
The invention provides compositions comprising a polymeric carrier of cellulose and/or starch, and an element. The carrier is insoluble in water and a salt of the element is soluble or partially soluble in water. The compositions include at least about 5% (wt/wt) of the element, based on a total weight of the composition, and have particle sizes between about 0.05 mm and about 1.5 mm. Also provided are methods of making such compositions and methods for using the compositions to deliver the element to a plant.