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在不同的水资源管理下,纳米颗粒在土壤-大米系统中的转化和积累

Haotian Gong¹, Yujian Wang², Lei Pan²

¹Institute of Soil and Fertilizer, Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830092, China; College of Ecology and Environment, Xinjiang University, Urumqi 830046, China; Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi 830046, China.

Ecotoxicology and environmental safety

|February 16, 2025

概括

纳米颗粒 (SeNPs) 的土壤应用促进了大米的生长和的吸收. 潮湿和干燥的条件交替增强Se积累,但减少叶子光合作用,同时影响土壤Se转化和细菌群落.

科学领域:

农业科学农业科学
环境科学环境科学
纳米技术纳米技术

背景情况:

纳米颗粒 (SeNPs) 在大米上的叶子应用正在研究中,但土壤应用对Se吸收和土壤转化的影响是有限的.
水资源管理在米种植中至关重要,影响营养动态和植物生理学.
了解不同水位的土壤中的SeNP行为对于有效的生物强化至关重要.

研究的目的:

调查土壤应用SeNP在连续洪水 (CF) 和交替湿干 (AWD) 水管理下对大米的影响.
分析米中的Se积累,土壤中的Se转化和树根球细菌群落.
为优化种植大米的Se生物强化战略提供见解.

主要方法:

在实验中,使用不同水管理 (CF和AWD) 和SeNP度 (0.0.5,2 mg·kg-1) 的米.
评估大米生长参数,植物组织中的Se积累和土壤Se分数.
使用分子技术分析树枝球细菌社区结构.

主要成果:

应用在土壤中的SeNP增强了大米的生长和Se的积累.
与CF相比,AWD促进了Se积累,但降低了叶子的光合作用活动和有机体Se含量.
土壤Se分量主要由有机结合的Se (OM-Se) 和残留的Se (RES-Se) 占据主导地位,在低度和AWD时具有更高的SeNP转化率.
SeNPs和水资源管理改变了树根球细菌群落; 2 mg·kg-1 SeNPs增加了Chloroflexi丰度,促进了稳定到活性Se分量的转化.

结论:

对SeNPs的土壤应用是有效的,可以增强米中的Se生物强化.
AWD水资源管理影响Se的吸收和转化,影响植物生理和土壤微生物群落.
该研究为在种植中使用SeNP提供了基础,特别是在Se缺乏地区,通过优化水资源管理和SeNP应用.

关键词:

细菌社区的细菌社区大米大米大米大米大米纳米粒子是一种纳米粒子.在土壤中应用.水资源管理水资源管理

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