论文部分内容阅读
通过对多种环境因素影响下毛乌素沙地南缘补连塔矿采煤塌陷区的土壤含水量的研究,为塌陷风沙区植被建设提供理论依据。研究表明:土壤冻结与积雪覆盖可以显著抑制塌陷区土壤水分亏缺。双因素方差分析表明对照区与2个塌陷区土壤含水量差异在土层未冻结时显著(P=0.0002)而在土层冻结与冻结且有积雪覆盖时不显著(P分别为0.09与0.85)。土层解冻后对照区与塌陷区的土壤含水量开始产生显著差异。解冻后不利于冻结的坡位、坡向率先进入水分亏缺状态并表现更加严重。降雨对塌陷区土壤水分亏缺有短时缓解作用。积雪融化并未显著改善解冻后塌陷区土壤水分状况。解冻后塌陷区浅层与水分剧烈变化层的水分散失在塌陷后2~3年表现明显。
Through the study of the soil moisture content in the coal mining subsidence area of BuLianTa mine in the southern margin of the Mu Us desert under the influence of various environmental factors, it provides a theoretical basis for the vegetation construction in the sand-blown sand area. The results show that soil freezing and snow cover can significantly reduce soil water deficit in the subsidence area. Two-way ANOVA showed that the difference of soil water content between control area and two subsidence areas was significant (P = 0.0002), but not significant when soil layers were frozen and frozen with snow cover (P = 0.09 and 0.85 ). After soil thawing, the soil moisture content of control area and subsidence area began to have significant difference. After thawing is not conducive to the freezing of the slope position, the slope of the first into the water deficit state and performance even more serious. Rainfall can short-term alleviate soil moisture deficit in subsidence area. The melting of snow did not significantly improve soil moisture status after thawing in the subsidence area. After thawing, the water loss in the shallow layer of the subsidence area and the drastic change of moisture is obvious in 2 ~ 3 years after the collapse.