Study on Soil Anti-erodibility of Different Stands of National Reserve Forest in Southern Mountainous Area of Liangzhou District
In order to reveal the soil anti-erodibility characteristics of different stands of national reserve forest in the southern mountainous area of Liangzhou District of Wuwei City,the soils of Armeniaca sibirica,Picea asperata and Pinus sylvestris var.mongolica were taken as the research objects,and the soil anti-erodibility indexes were deter-mined.The results showed as the following five aspects.(1)The soil bulk density of A.sibirica,P.sylvestris var.mongolica and P.asperata forest land decreased with the increase of soil depth.(2)The organic matter content of surface soil of A.sibirica,P.sylvestris var.mongolica and P.asperata forest were 0.91％,1.35％and 0.68％,respectively;organic matter content of the sub-layer soil were 1.04％,1.11％and 0.76％,respectively;and the or-ganic matter content of the third layer soil were 1.11％,1.54％and 0.94％,respectively.The soil organic matter content of different stands increased with the increase of soil depth,and the soil organic matter content of P.sylves-tris var.mongolica forest was higher than that of A.sibirica forest and P.asperata forest.(3)The average content of＞0.25 mm dry sieve aggregates in 0-30 cm soil depth was P.sylvestris var.mongolica forest land(91.59％)＞P.asperata forest land(88.75％)＞A.sibirica forest land(84.07％),and the average content of＞0.25 mm wa-ter-stable aggregates was P.sylvestris var.mongolica forest land(21.27％)＞P.asperata forest land(9.01％)＞A.sibirica forest land(2.73％).(4)The damage rate of the three stands in different soil hierarchical structures was A.sibirica＞P.armeniaca forest land＞P.sylvestris var.mongolica forest land,and the soil anti-erodibility of forest land was P.sylvestris var.mongolica forest＞P.asperata forest＞A.sibirica forest.(5)Through correla-tion analysis,the rate of soil structure damage and the content of＞0.25 mm water-stable aggregates could be used as good indicators to evaluate soil anti-erodibility.
southern mountainous area of Liangzhou Districtdifferent types of standssoilanti-erodibility charac-teristics
万方数据
维普
