格姆滩高寒草甸不同群落土壤养分研究

Soil nutrition at different plant communities on alpine meadow in Gemutan

研究了格姆滩高寒草甸不同群落土壤养分的变化规律。结果表明:小嵩草草甸和山生柳灌丛草甸各土壤层养分含量随土壤深度的增加呈下降趋势,而藏嵩草沼泽化草甸却表现出相反的趋势,即随土壤深度的增加各层养分含量呈上升趋势;不同植物群落中各土壤养分含量在相同土壤层上差异显著(P<0.05)。总体来看,土壤养分含量藏嵩草沼泽化草甸>山生柳灌丛草甸>小嵩草草甸。

Soil nutrition contents at different plant communities on alpine meadow in Gemutan were determined.The results showed that soil nutrition content of each layer decrease with soil depth increasing at Kobresia pygmaea meadow and Salix oritrepha shrub meadow,but K.tibetica swamp meadow tend to be opposite.That is,soil nutrition content of each layer increase with soil depth increasing.There is a significant difference on soil nutrition content at same soil layer depth for each community（P0.05）.Generally,soil nutrition content showed the pattern like this： K.tibetica swamp meadowSalix oritrepha shrub meadowK.pygmaca meadow.