【摘要】 首次以章古台地区林龄为10a、20a、35a、50a和60a的樟子松人工林作为研究对象,以荒草地为对照,利用便携式土壤剖面水分速测仪分别对0-200cm土层的水分含量进行了测定并采用SPSS16.0分析。结果表明:在整个生长季节,林分密度分别为883、850、400、267、400株/hm2的10a、20a、35a、50a、60a的沙地樟子松人工林的土壤平均含水量表现为10a生林分的最低,50a生林分的最高;在垂直变化上,浅层土壤水分高,10a、20a和35a的樟子松林地随着土层深度的增加含水量明显下降,50a和60a的樟子松林地土壤水分变化幅度小;不同林龄之间的表层土壤含水量除35a与60a生有显著差异外,其余林龄间差异均不显著;根系层土壤含水量,10a与60a生差异性显著,其它差异不显著;土壤底层含水量,除20a和60a樟子松林土壤底层含水量差异不显著,其余林龄的樟子松林底层含水量均两两差异极显著,通过合理的密度调节可以使林地土壤水分保持稳定。更多还原

【Abstract】 In order to explore the influence of plantation period towards the soil moisture in sandy land in northwestern Liaoning,10,20,35,50,60 aged of P. sylvestris var. Mongolica artificial forests in zhanggutai area were chosen as the research object and compared with the wild grass ground for the first time. We measured the moisture content of 0- 200 cm soil profile respectively by portable soil profile fast moisture analyzer and analyzed data using SPSS16. 0. Results showed that throughout the growing season the average soil water content in 10-year old of P. sylvestris var. Mongolica artificial forest was the lowest,and the highest was the 50- year old artificial forest,in the planted P. sylvestris var. Mongolica forests with different stand age( 10- year,20- year,35- year,50- year and 60- year) and different stand densities( 883,850,400,267,400 trees per hectare). For the vertical variation,the soil water content of soil surface was higher. The soil moisture content decreased obviously in 10- year,20- year and 35- year old of P. sylvestris var. Mongolica artificial forest; and the soil moisture content in 50- year and 60- year old of P. sylvestris var. Mongolica decreased less obviously as the soil depth increased. The soil moisture of surface in different stand had no significant difference except 35- year and60- year old stands. The soil moisture of root zone in different age stands had no significant difference except 10- year and 60- year stands,while the soil moisture content at the bottom of the soil had extremely significant difference but 20- year and 60- year stands. Therefore,P. sylvestris var. Mongolica forests need to be lumbered to decrease the plant density to keep its stability with the age increased.更多还原