煤矿复垦区沙棘人工林土壤水分时空分布特征研究

【目的】探明煤矿复垦区沙棘人工林土壤水分时空分布特征,促进人工林培育过程中的水分管理。【方法】以鄂尔多斯市煤矿复垦区沙棘人工林为研究对象,开展了不同林龄的中国沙棘和大果沙棘人工林土壤水分时空分布特征研究。【结果】①随着林龄的增加,中国沙棘和大果沙棘林地土壤水分呈"减小-增加-减小"趋势;不同林龄中国沙棘和大果沙棘林地土壤水分存在显著差异(P<0.05),其中6 a林龄的中国沙棘林地土壤水分显著高于其他林龄林地土壤水分(P<0.05),3 a林龄的大果沙棘林地土壤水分显著高于其他林龄林地土壤水分(P<0.05)。②在0～100 cm土层中,6 a林龄的中国沙棘各土层之间土壤水分差异不显著,其余林龄中国沙棘和大果沙棘林地各土层之间土壤水分均存在显著差异(P<0.05)。③中国沙棘林地随着距树干距离的增加土壤水分呈增加趋势,大果沙棘林地随着距树干距离的增加土壤水分呈减小趋势。【结论】煤矿复垦区沙棘林地土壤水分差异较大,生产中需要根据具体的林龄、树木品种和土壤空间差异,采取适宜的水分管理措施。

Temporal and Spatial Distribution Characteristics of Soil Moisture in Seabuckthorn Plantations in Coal Mine Reclamation Area

【Objective】The purpose of this paper is to explore the spatial and temporal distribution characteristics of soil moisture of seabuckthorn plantation in coal mine reclamation area,and promote water management in the process of artificial forest cultivation.【Method】The seabuckthorn plantation in the coal reclamation area of Ordos City was studied and different forests were carried out. Temporal and spatial distribution characteristics of soil moisture of Chinese seabuckthorn and Hippophae rhamnoides Linn. plantations.【Result】① With the increase of forest age, the soil moisture of difference Chinese seabuckthorn and Hippophae rhamnoides L. forests showed a trend of"reducing-increasing-decreasing"; the soil moisture of Chinese seabuckthorn and Hippophae rhamnoides L. forests in different forest ages was significant(P<0.05). The soil moisture of Chinese seabuckthorn forest in 6 years old forest was significantly higher than that in other forest age forests(P<0.05). The soil moisture of seabuckthorn forest in 3 years old forest was significantly higher than other forest ages(P<0.05). ②In the 0～100 cm soil layer, the soil moisture difference between the soil layers of Chinese seabuckthorn at 6 years old was not significant, and the soil moisture of the other forest ages of Chinese seabuckthorn and seabuckthorn forest was significant(P<0.05). ③The soil moisture of Chinese seabuckthorn forest increased with the distance from the trunk.The soil moisture of the seabuckthorn forest increased with the distance from the trunk.【Conclusion】The soil moisture of seabuckthorn forest land in the reclaimed area of coal mine is quite different. It is necessary to adopt appropriate water management measures according to the specific forest age, tree species and soil space.