关键词: 固沙林, 根际土壤

Abstract: This paper mainly deals with properties of rhizosphere soil of main tree species(Mongolian Pine, Chinese Pine, Poplar and Scotch Pine) of sand-fixation forest in Zhanggutai. The chief results are as follows: The pH value in rhizosphere soil of different tree species is lower than that in non-rhizosphere soil. The organic matter content in the rhizosphere soil of trees except poplar is lower than that in non-rhozosphere soil. The content of total N, available N and available K in rhizosphere soil of Mongolian Pine, Chinese Pine, Poplar and Scotch Pine plantation are all higher than those in non-rhizosphere soil, but the content of available P is clearly deficient in rhizosphere soil. The extent of the deficiency of available P in rhizosphere soil of Mongolian Pine plantation is the highest and may be related to the deficiency of P in needles of Mongolian Pine. The amount of various microorganisms in rhizosphere soil of four tree species is more than those in non-rhizosphere soil. The enzymatic activity of four species in rhizosrhere soil is higher than those in non-rhizosphere soil(the value of R/S is from 1.50 to 3.01).

Key words: sand-fixation forest, rhizosphere soil