纳米粒子和合物能否在冬季小麦的根球中补充土壤?
Yunsheng Jia1, Erwin Klumpp2, Roland Bol2
1Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; Institute of Bio- and Geosciences, Agrosphere (IBG-3), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
The Science of the total environment
|August 26, 2024
概括
植物 (P) 的吸收改变了土壤的P分布. 树叶球土壤显示在小纳米颗粒 (<20 nm) 中耗尽的P,在较大的合物 (>100 nm) 中丰富的P.
科学领域:
- 土壤科学 土壤科学
- 生物地质化学生物地质化学
- 植物营养 植物营养
背景情况:
- 根系球是强烈微生物活动的区域,对于植物获取营养物质,特别是 (P) 来说至关重要.
- 了解根球中不同土壤颗粒大小分数内的P动态是改善作物P吸收和土壤肥沃性的关键.
研究的目的:
- 为了研究水可提取 (P) 含量在纳米颗粒 (<0.1微米) 和小合物 (<0.45微米) 分数在树叶球和非树叶球土壤之间的差异.
- 为了测试P分布因植物在树叶圈内吸收而改变的假设.
主要方法:
- 球和非球土壤 (Luvisol和Cambisol) 从冬季小麦田中收集.
- 用湿和离心法分离了土壤部分 (53-250微米,20-53微米,0.45-20微米,<0.45微米).
- 结合体分数 (<0.45μm) 进一步分析使用非对称流场流量分化 (AF4) 与ICP-MS和OCD相结合,用于元素组成,重点关注0.66-20nm,20-100nm和100-450nm大小范围内的P含量.
主要成果:
- 在根球土壤和非根球土壤之间的微聚合物分量中,没有发现P含量的显著差异.
- 树球土壤在最小的纳米粒子分数 (0.66-20 nm) 中显示了~26%的P耗尽.
- 相反,较大的合物分量 (100-450 nm) 显示根球土壤中的P含量与非根球土壤相比增加了两倍.
结论:
- 植物吸收P会导致P在树根圈内重新分配.
- 较小的纳米粒子 (<20 nm) 似乎是植物可用的P的来源.
- 过剩的P被隔离在根球中以更大的细合物分量 (100-450nm) 进行隔离.
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