文档介绍：
采煤塌陷地土壤氮磷季节性变化规律研究#
任加国, 武倩倩
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山东科技大学山东省沉积成矿作用与沉积矿产重点实验室,青岛 266590
摘要:以兖州煤矿塌陷地为研究对象,通过分层采集不同水文期的土壤样品,研究塌陷地积
水区和非积水区氮磷变化规律。结果表明,在季节性积水区一个水文年内,土壤中氮元素发
生流失现象,全氮流失率达 %,碱解氮流失率达 %;全磷、速效磷发生沉积聚集
现象,其中速效磷的积聚更明显。在非积水区,由于塌陷加剧土壤养分的表聚作用,促使全
氮和碱解氮的流失减少。而全磷发生流失,流失率为 %。在垂向上,丰水期各指标含
量减少的梯度>平水期的梯度>枯水期的梯度,在 0~40cm 深度,碱解氮流失率最高为 %,
速效磷流失率最高为 %,在 40~60cm 变化幅度较小,在 60cm 深度之下,各指标逐渐
成汇聚状态。判定 60cm 深度为土壤养分的塌陷影响深度。
关键词:采煤塌陷;土壤养分;季节性变化
中图分类号:S15
Seasonal Changes of Soil Nitrogen and Phosphorus in Coal
Mining Subsidence Area
REN Jiaguo, WU Qianqian
(Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals,
Shandong University of Science and Technology, Qingdao 266590)
Abstract: Taking coal mining subsidence area in Yanzhou city as an example, and collecting
different period soil samples, the soils of waterlogged and non-water area are tested to research the
changes of nitrogen and phosphorus. Results show that: in the seasonal waterlogged area, there is
big loss of soil nitrogen in a hydrological year, and the loss rate of total nitrogen is up to %,
available nitrogen is up to %. Moreover, total phosphorus and rapid available phosphorus
deposited, and the latter is more serious. In the non-water area, accumulation of nutrient
exacerbates for collapse in the soil surface, the loss r