木论自然保护区森林土壤的理化特性

按木论自然保护区森林植被分布状况及相应海拔高度设置代表性的土壤剖面(0-80 cm土层),按国颁标准采集样品与测定土壤理化特性。结果表明:(1)土壤容重为0.86-1.38 g.cm-3;土壤总孔隙度为27.66%-44.14%,其中土壤非毛管孔隙度为4.98%-13.22%;土壤通气度为4.67%-13.08%。(2)土壤pH值为6.03-7.45;有机质含量为13.9-120.3g.kg-1;全N为0.81-3.74 g.kg-1;全P为0.21-0.78 g.kg-1;全K为11.62-22.54 g.kg-1。以上表明,广西木论自然保护区森林土壤疏松、通气性能良好;土壤中N、P、K主要养分含量丰富。

Physical and chemical properties of forest soils in Mulun nature reserve

According to the distribution of forest vegetation in the Mulun nature reserve and the corresponding elevation,we set the representative soil profile(0-80 cm soil layer) by the state standards to determine the soil physical and chemical properties.The results showed that:(1) The soil bulk densities were 0.86-1.38 g·cm-3;soil total porosities were 27.66%-44.14%,of which the soil non-capillary porosities were 4.98%-13.22%;soil aeration rates were 4.67%-13.08%.(2) The soil pH values were 6.03-7.45;organic matter contents were 13.9-120.3 g·kg-1;total N were 0.81-3.74 g·kg-1;total P were 0.21-0.78 g·kg-1;total K were 11.62-22.54 g·kg-1.It was demonstrated that the forest soil was looser,and it had good ventilation,and soil main nutrients as N,P,K contents were rich in the Mulun nature reserve of Guangxi.