纳米-亚微米级复合材料对褐潮土有机无机复合体含量及各粒级复合体中C、N、P含量与分布的影响

通过盆栽试验研究了纳米-亚微米级复合材料对褐潮土各粒级复合体组成及其中C、N、P含量与分配的影响。结果表明,1)施入纳米-亚微米级复合材料后,褐潮土各粒级复合体的含量较对照发生了改变,F1(2m)和F3(10～50m)粒级含量降低,F2(2～10m)和F4(50～100m)粒级含量增加。2)纳米-亚微米级复合材料可提高土壤及各粒级中C、N、P的含量,而增加幅度因材料而异;蒙脱土纳米-亚微米级复合物高岭土纳米-亚微米级复合物塑料纳米-亚微米级复合物。3)F3(10～50m)粒级中有机碳、全氮、全磷含量较低,但该粒级复合体含量占土壤固相的比重最大,因此该粒径中C、N、P对土壤肥力的贡献较大。4)纳米-亚微米级复合材料使土壤的有机碳、氮、磷在各粒级复合体中分配系数的增加以F2(2～10m)粒级最高,说明各养分进入F2粒级最多,表明该粒级对土壤养分的转化和平衡起着重要的调节作用。

Effect of Nano-subnanocomposites on contents and distribution of organic C,total N and P in soil organic-mineral granules in drab fiuvo-aquic soil

The effect of Nano-subnanocomposites on contents and distribution of organic C,total N and P in soil organic-mineral granules in drab fluvo-aquic soil were studied through potted planting in greenhouse.The major results are as follows: 1) Nano-subnanocomposites application changed the contents of soil organic-mineral granules compared to control with equivalent contents of nitrogen,phosphorus,potash.The contents of F₁(<2 μm) and F₃(10—50 μm) decreased,while the contents of F₂(2—10 μm) and F₄(50—100 μm) increased.2) The contents of organic C,total N and P in different sized granules and total soil were enhanced due to Nano-subnanocomposites application,and the magnitude of enhancement depended on different Nanocomposites materials with the following order: Nanomontmorillonite>Nano-kaoline>Nano-polystyrene.3) Although the contents of organic C,total N and P in F₃(10—50μm) was lower comparer to others,it was still important in terms of soil fertility since it account for the highest distribution proportion of granules in drab tidal soil,so F₃(10—50 μm) was still important in terms of soil fertility.4) The increased distributive proportion of organic C,total N and P in F₂(2—10 μm) granules was highest due to Nano-subnanocomposites application,which showed that most nutrients had entered the F₂(2—10 μm) granules,and F₂(2—10 μm) played an essential role in the cycling,transforming and holding capacity of soil nutrients.