襄汾溃坝事件对下游土壤理化性质及作物生长的影响

[目的]为研究溃坝事件对下游土壤理化性质、作物生长的影响。[方法]以襄汾"9.8"溃坝下游土壤与农作物为研究对象,对溃坝物覆盖地区和未覆盖地区的土壤进行对比分析。[结果]溃坝物覆盖区土壤的物理性黏粒(0.01 mm)、田间持水量分别比未覆盖区土壤低15.2%、28.1%,达0.05显著差异水平,但紧实度未达显著差异;溃坝物覆盖区土壤的全氮、速效磷含量分别比未覆盖区土壤低31.8%、35.3%,其中全氮含量达0.05显著差异水平,速效磷含量达0.01显著差异水平,pH、有机质、速效钾含量均未达显著差异水平。[结论]P元素的缺失是溃坝物对覆盖地区土壤理化性质影响的主要表现。

Effects of Xiang Fen Downstream Incidents on Soil Physiochemical Properties of Lower Reaches and Crops Growth

[ Objective] Effects of downstream incidents on soil physiochemical properties and crops growth were studied. [ Method] The soils of the region covered with mud fluid and uncovered with mud fluid soil were analyzed, which is located on the lower reaches of the place of Xiang Fen ＂9.8＂ downstream incidents. [ Result] Compared with uncovered soil with mud fluid, the content of 〈 0.01mm diameter and field capacity of the region covered with mud fluid decreased by 15.2% and 28.1% respectively. There were significant differences in 〈 0.01 mm diameter and field capacity, however it wasn＇ t significantly different from soil compaction. The content of total N and available P of the region covered with mud fluid decreased by 31.8% and 35.3% respectively. There were significant difference in total N and available P, however it wasn＇t significant from pH, organic matters and available K. [ Conclusion] The deficiency of P is the main manifestation of dam-break physi- cal properties influence on the soil in the coverage area.