三峡库区澎溪河消落带落干期土壤硝化强度及影响因素

发布时间：2018-04-16 08:27

本文选题：三峡库区 + 消落带　；参考：《重庆大学学报》2017年03期

【摘要】：研究了三峡库区澎溪河落干期消落带不同地点、不同高程段、不同土地利用方式下土壤硝化强度及影响因素。结果表明,研究区域消落带硝化强度范围为0.76~9.76 mg/kg·d,平均值为3.76±0.76mg/kg·d,明显低于国内其他研究区域土壤硝化强度。澎溪河消落带从上游汉丰湖到下游黄石,土壤硝化强度呈现递减的趋势。随着高程的增加,消落带土壤硝化强度逐渐降低,但没有显著差异(P0.05)。消落带不同土地利用方式中,河滩地土壤硝化强度显著高于耕地土壤硝化强度(P0.05),是耕地土壤硝化强度的1.82倍。消落带土壤硝化强度与土壤pH值呈显著正相关(P0.05),与有机质含量及亚硝化菌数量呈极显著正相关(P0.01),周期性的淹水影响了消落带土壤pH值和有机质含量,从而影响了消落带土壤硝化强度。
[Abstract]:The soil nitrification intensity and its influencing factors in different places, different elevation sections and different land use patterns in the falling zone of Penghuxi River in the three Gorges Reservoir area were studied in this paper.The results showed that the range of nitrification intensity was 0.76 ~ 9.76 mg/kg / d and the average value was 3.76 卤0.76mg/kg _ d, which was significantly lower than that of other study areas in China.From the upper reaches of Hanfeng Lake to the lower reaches of Yellowstone, the soil nitrification intensity is decreasing.With the elevation increasing, the soil nitrification intensity decreased gradually, but there was no significant difference (P 0.05).In different land use patterns, the nitrification intensity of river beach soil was significantly higher than that of cultivated land (P 0.05N) and 1.82 times of cultivated land nitrification intensity.There was a significant positive correlation between soil nitrification intensity and soil pH value, and a significant positive correlation between nitrification intensity and organic matter content and nitrifying bacteria quantity. Periodic flooding affected soil pH value and organic matter content.Thus, the nitrification intensity of the soil in the falling zone was affected.
【作者单位】：重庆大学城市建设与环境工程学院;中国科学院重庆绿色智能技术研究院;
【基金】：国家自然科学基金重点项目(41430750);国家自然科学基金资助项目(51179215)~~
【分类号】：S153

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