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Magnetic kirigami-based wearable plant sap flow sensor for fragile grass-like plants
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DOI：10.1038/s41528-026-00630-9.png)
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Abstract
En 中文
Plant-wearable sensors that enable real-time, non-invasive monitoring of physiological information have the potential to transform precision agriculture. However, designing these sensors for fragile grass-like plants presents challenges. In this study, we introduce the first wearable sap flow sensor specifically engineered for rice, a vital crop for human survival. This innovative sensor continuously monitors the plant’s sap flow, enabling real-time assessment of its water status in actual agricultural environments. The sensor integrates sensing components into a thin, stretchable magnetic kirigami substrate, resulting in a highly compact design (3 × 1.6 cm) and a lightweight (0.44 g). Unlike conventional polymer-based wearable sensors (such as PDMS), our kirigami-based sensor offers greater breathability to maintain plant health during long-term operation. Its magnetic feature also facilitates rapid self-attachment to plants, simplifying field deployment. Based on these designs, we successfully achieved long-term sap flow monitoring for 8 weeks under real farming conditions. Additionally, we developed a high-precision drought stress prediction method based on sap flow, achieving an accuracy of 93.22%, significantly outperforming traditional soil moisture-based approaches (57.69%). We believe our sensor represents a promising advancement in precision agriculture by enabling timely detection of plant drought stress, thereby improving water-use efficiency and enhancing agricultural productivity.
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