Study On Root Systems Distribution And Habitat Flexibility Of Salix Godejevii Y.L.Chang In Hunshandake Sandland

Root distribution and canopy structure parameters of S.godejevii in different sandy land habitats(semi-fixed sand dunes, fixed sand dunes and inter-dunes low land), as well as species composition and their frequency in the herb layer of the scrubs, were compared The results were as follows:The population hi the semi-fixed sand dunes had the most developed root systems, followed by he population in the fixed sand dunes, and that hi the inter-dunes low land was the last. The number of thick roots was closely related to the soil water contend and volume weight of the soil, while that of fine roots closely related to the soil finestra degree and volume weightPlants in the inter-dunes low land were more branchy with a larger number of first-year shoots which were shorter, and grew more slowly; the frequency distribution of the first-year shoot lengths tended to have a "thin" peak drifting towards the left; then-leaves were shorter and narrower with a high length/width ratio. Plants growing in the semi-fixed sand dunes, on the other hand, were less branchy with a larger number of first-year shoots which were longer, and grew faster; their leaves were longer and wider with a low length/width ratio. The characteristics of the branching system and leaf dimensions of the plants in fixed sand dunes were rather intermediary between those of the above.The frequency distribution and their frequency in the herb layer the scrubs also varied with habitats.