Research On The Growth Of Salix Psammophila And Characteristics Of Plant And Soil Moisture Within Three Cultivation Models Of Salix Psammophila

This article studies salix pasmmophia forest configured with three cultivation models salix pasmmophia which lives in the cover sand of Bojianghai town, Ordos, Inner Mongolia. Through the method of taking samples in the typical sample yard, the article makes research on the growth of salix pasmmophia,plant within the salix pasmmophia forest and the soil moisture around it.⑴Biomass has a great influence on sprout numbers and the combination of salix pasmmophia crown diameter and shrub height. The best salix shrub biomass mode for low density, mid-density salix pasmmophia forest and caragana mixed with salix pasmmophia are: w=13.612-4.778(D2H)+0.748(D2H)2(Best),w=1.408*e(0.027N)(Second Best) and w=-0.468+0.236N-0.001N2(Third Best).While doing fitness test with correlation coefficient, sample mean square and mean square ratio, correlation coefficient gets higher fitting rate.(2) In the process of growing, the biomass listed from high to low will be: low density salix pasmmophia forest, mid density salix pasmmophia forest and forest mixed with salix pasmmophia and caragana.The best models for the braches growth are: y= 3.417+55.030A-2.941A2 (Best),y=35.312+53.979㏑ A (Second Best) and y=-6.390+31.170A-1.845A2 (Third Best).(3) salix pasmmophia planted on the free land with different types of configured mode, evenness and importance value of mesophyte and ageratum houstonianum increases, while important value of xerophyte and semi-shrub decreased. For the index of plant species, species richness, diversity index and penenial herb important value, mid-density salix pasmmophia forest decreases. Caragana mixed with salix pasmmophia, low density salix pasmmophia forest slightly increased. Among them, caragana mixed with salix pasmmophia has the highest index value.(4) The soil moisture dynamics of caragana mixed with salix pasmmophia is higher than comparison forest and the other two kinds of salix pasmmophia forest. It shows that caragana mixed with salix pasmmophia has relatively stronger ability on conserving water. There are no vertical differences on soil moisture dynamics configured salix pasmmophia forest, while the mid-density salix pasmmophia forest has the lowest soil moisture.