The Study On The Influence Of Different Stubble Height On The Growth Of Salix Psommophila

As an excellent tree species for windbreak and conserving soil and water,besides,it is also important industrial timber forest tree species in sand,it is of great significance to the rejuvenation of salix psammophila by use of stubble technique.The study put salix psommophila plantation in Dalad Clay Beam forest farm as the research object,adopted interval 0cm,5cm,10cm and 15cm four stubble height and Ocm flat stubble height continuous experiments,analyzed the growth dynamics of the local salix psommophila forest plantation,and the growth of herbaceous vegetation in the forest.The results indicate that:(1)Interval stumping plays a role in promoting the growth of salix psommophila.The stubble height has the most influence on the plant height,canopy and the numbers of sprout.In addition to the base diameter of salix psommophila,the other growth indicators of salix psommophila,all in stubble height with Ocm is advisable.(2)Continuous stumping every year inhibit the growth of salix psommophila,and salix psommophila can grow strongly when stumping once every 3?5 years.(3)The biomass and carbon of salix psommophila is the biggest and the carbon sink function is the best when the stubble height is Ocm.However,continuous stumping every year.the biomass and carbon of salix psommophila will reduce year by year,carbon sink function also gradually weakened.(4)The averages of height and biomass of herbaceous vegetation in salix psommophila forest are the biggest when the stubble height is 5cm,the averages of the density and coverage of herbaceous vegetation in salix psommophila forest are the biggest when the stubble height is 10cm.The biodiversity of the herbaceous vegetation of grassland around salix psommophila forest and the herbaceous vegetation in salix psommophila forest is different.The vegetation of grassland is given priority to with Echinops sphaerocephalus,Sophora alopecuroides and Artenmisia desertorum.After planting salix psommophila,the vegetation of grassland is given priority to with salix psommophila,Thermopsis lanceolata,Oxytropis psamocharis,Salsola collina Pall,Polygonum senticosum and Leymus chinensis(Trin.).However,The growth status of herbaceous vegetation on the grassland is far superior to the one of the sampled area.