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Adhesive Nanocomposite for Prolonging Foliar Retention and Synergistic Weeding and Nourishing
Author(s) -
Ji Yanzheng,
Huang Mengjie,
Yan Jia,
Qi Taomei,
Li Tao,
Liu Yanhui,
Lü Shaoyu,
Liu Mingzhu
Publication year - 2020
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.202000010
Subject(s) - pesticide , fertilizer , nanocomposite , leaching (pedology) , chemistry , nutrient , agronomy , environmental science , materials science , composite material , biology , organic chemistry , soil water , soil science
The volatilization and leaching for most fertilizers and pesticides raise questions about the sustainability of ecosystems. To enhance the utilization of fertilizers and pesticides, pesticide–fertilizer combined nanocomposites are developed to prolong foliar retention and play a synergistic effect of weeding and nourishing for plant growth. The pesticide–fertilizer combined nanocomposites are prepared based on positive‐charge functionalized mesoporous silica and polydopamine, by chelating micronutrients (Zn 2+ ) and loading pesticide 2,4‐D. A high loading capacity of Zn 2+ (233.4 mg g −1 ) and 2,4‐D (17.8%) is achieved. Zn 2+ and the pesticide show excellent pH‐responsive release behavior. At pH 7.0, the cumulative release is 45.35% for the pesticide after 144 h and 17% for Zn 2+ after 30 days. These results reveal that the pesticide–fertilizer combined nanocomposites can remove weeds quickly and provide nutrients for crop growth in the long term. The germination rate of purslane dramatically decreases when treating with the nanocomposites, while that of corn seeds is not influenced. Excellent adhesion performance of the nanocomposites is observed on a hydrophobic surface, which can effectively reduce the risk of being washed away by rain. All the results indicate that the pesticide–fertilizer combined nanocomposites with a good synergistic effect is environmentally friendly for large‐scale application in sustainable modern agriculture.