Montmorillonite-reinforced alginate/polyacrylamide semi-IPN hydrogel fertilizers engineered with betaine for enhanced crop resilience under cold and drought stress.
Xu R, Tian Y, Zhu B, Qu G, Zheng X
Soil Health
Gardeners in cold, dry climates who lose plants to late frosts or summer dry spells could one day apply a single soil amendment that holds water like a sponge, releases fertilizer only when plants need it, and helps roots weather the cold — all at once.
Researchers created a gel material you mix into soil that acts like a slow-release fertilizer and a tiny water reservoir at the same time. It's smart enough to release more nutrients when the soil is warm and hold back when it's cold, and it even contains a natural compound that helps plants cope with stress. In tests on forage grasses under drought and near-freezing conditions, plants treated with this gel nearly doubled their fresh weight compared to untreated plants.
Key Findings
Available phosphorus in treated soil increased by over 271% and ammonium nitrogen by nearly 9-fold compared to controls.
Plants grown with the hydrogel showed a 98.89% increase in fresh weight under combined drought and cold stress.
The material maintains structural flexibility and function at temperatures as low as -25°C, enabling year-round soil moisture retention.
chevron_right Technical Summary
Scientists engineered a smart hydrogel fertilizer containing clay, a plant-protective compound (betaine), and biodegradable polymers that releases nutrients in response to soil temperature and pH — dramatically improving crop survival under drought and freezing conditions.
Abstract Preview
Global agricultural productivity is increasingly threatened by the compounding effects of water scarcity, low-temperature extremes, and inefficient fertilizer utilization. To overcome these challen...
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