Department of Analytical Chemistry, Connecticut Agricultural Experiment Station, New Haven, Connecticut 06511, United States.
Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States.
J Agric Food Chem. 2024 Aug 7;72(31):17295-17305. doi: 10.1021/acs.jafc.4c03997. Epub 2024 Jul 29.
Most nitrogen (N) applied to plants as fertilizer is lost through leaching. Here, nanocellulose was used in mitigating N leaching loss. Lettuce-cropped soil was treated with unmodified or Zn-modified nanocellulose (1-2% by wt) in combination with NPK, compared with urea and NPK-only treatments. Consecutive leaching, plant growth, plant N uptake, and soil nitrogen retention were assessed. Nanocellulose + NPK significantly ( ≤ 0.05) reduced N leaching, compared with urea and NPK-only. 1-and-2 wt % nanocellulose, as well as Zn-modified 1-and-2 wt % nanocellulose, reduced N leaching by 45, 38, 39, and 49% compared with urea and by 43, 36, 37, and 47% compared with NPK-only, respectively. Nitrogen leached mainly as NO (98.4%). Compared with urea and NPK, lettuce shoot mass was significantly ( ≤ 0.05) increased by 30-42% and by 44-57%, respectively, by all nanocellulose treatments, except for the Zn-modified 1 wt % nanocellulose. Leached N negatively correlated to biomass yield. Soil N retention was enhanced by the pristine and Zn-modified nanocelluloses between 27 and 94%. Demonstrably, nanocellulose can be utilized for mitigating N loss in soil and supporting crop production, resource management, and environmental sustainability.
大多数作为肥料施用于植物的氮（N）通过淋溶而损失。在这里，使用纳米纤维素来减轻氮淋溶损失。与尿素和仅 NPK 处理相比，用未改性或 Zn 改性纳米纤维素（按重量计 1-2％）处理生菜种植的土壤，与 NPK 一起处理，与尿素和仅 NPK 处理相比，纳米纤维素+NPK 显著（≤0.05）减少了氮淋溶。1％和 2％wt 的纳米纤维素以及 Zn 改性的 1％和 2％wt 的纳米纤维素分别比尿素减少了 45、38、39 和 49％的氮淋溶，比仅 NPK 减少了 43、36、37 和 47％的氮淋溶。淋出的氮主要为 NO（98.4％）。与尿素和 NPK 相比，所有纳米纤维素处理均使生菜地上部生物量分别显著（≤0.05）增加了 30-42％和 44-57％，除了 Zn 改性的 1wt％纳米纤维素之外。淋出的 N 与生物量产量呈负相关。原始和 Zn 改性的纳米纤维素将土壤 N 保留率提高了 27-94％。显然，纳米纤维素可用于减少土壤中的氮损失并支持作物生产，资源管理和环境可持续性。
