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作 者 ：陈欣1;史奕1;鲁彩艳1;王国宏2

期 刊 ：植物营养与肥料学报 2003年 9卷 3期 页码：284-287

关键词：有机物料；无机氮；耕地黑土；团聚体水稳性；

Keywords:organic material, inorganic N, cultivated black soil, water stability aggregates,

摘 要 ：用室内模拟试验研究了有机C、无机N添加对耕地黑土不同粒级团聚体水稳性的影响。结果表明 ,在不添加任何物料的湿培养条件下 ,随团聚体粒径增大抵抗浸水分散能力减弱 ;添加葡萄糖和玉米根干粉对 >1mm水稳团聚体有良好保护作用 ,但不能保护小粒径的团聚体。单纯添加无机N会引起耕地黑土团聚体水稳性下降。

Abstract:By the experiment of laboratory simulation, effect of organic C and inorganic N addition on water stability of aggregates with different particle fraction from cultivated black soil were studied. The results showed that the ability of aggregates resisting shaking dispersion in water reduced with particle size increasing. The addition of maize root powder and glucose played an important role in protecting the water stability of aggregates which the particle size was bigger than 1mm, but couldn‘t protect the water stability of aggregates which the particle size was smaller than 1mm. Applied inorganic N only resulted in the decline of water stability of aggregates in cultivated black soil.

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