Application of Seaweed Extracts in Agriculture Production and Their Impact on Crop Stress Resistance

doi:10.11924/j.issn.1000-6850.casb2025-0717

Abstract

Abstract:

To summarize the application of seaweed extracts in agricultural production and their mechanisms in enhancing crop stress resistance (such as drought and salt tolerance, disease resistance, etc.), providing theoretical references for green agriculture, this paper employs literature research and systematic review methods to comprehensively analyze the bioactive components, application methods, and effects of seaweed extracts on crop physiology, biochemistry, and soil environment. Seaweed extracts are rich in active substances including plant hormones, polysaccharides, betaines, and minerals. Through foliar spraying or soil irrigation, they can effectively promote seed germination, root development, and nutrient absorption. Under stress conditions, seaweed extracts activate the antioxidant enzyme system in plants, alleviating oxidative damage caused by drought and salt stress; induce the expression of disease-resistant proteins and related genes, enhancing resistance to fungal diseases and insect pests; and can act as biosorbents to remediate soil contaminated with heavy metals and organic pollutants, improving soil micro-ecology. Their application significantly increases crop yield and quality. Seaweed extract is an efficient biostimulant with significant potential in enhancing crop stress resistance and soil remediation, making it an important resource for developing sustainable green agriculture.

Key words: seaweed extract, biostimulants, crop stress resistance, soil improvement, plant protection

CLC Number:

S-3农业科学研究、试验

QU Yuankai, PAN Dongyun, CHEN Hongjiang, SUN Hongzhu, LI Mingtan, XIE Jiali, SUN Liwei, CUI Xiutao. Application of Seaweed Extracts in Agriculture Production and Their Impact on Crop Stress Resistance[J]. Chinese Agricultural Science Bulletin, 2026, 42(14): 203-209.

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