The Analysis Of Benefit Of The Forestation Of The Qubqi Desert Under The Technology Of The Hydrodynamic Shock

The research object was the Salix planted through making use of the technology of the hydrodynamic shock, we analyzed its economic efficiency, ecological efficiency and social efficiency, the conclusions as follows:(1) Compared with the traditional way of planting Salix, in every one kilometer square the way of making use of the technology of the hydrodynamic shock to plant the Salix can save1040Yuan. Four years later, the direct benefits reached up to3650Yuan. The carbon benefit of the average year was2218kcal.(2) Carbon sequestration was as follows:after four years of forestation,1h m2Salix forest could intake8104kilogram carbon oxygen. In every year, it could intake2206kilogram carbon oxygen.(3) Soil improvement benefits were as follows:compared with bare sand dunes, the amount of fine grains of sand got larger and larger. The four-year old Salix appeared coarse sand grains in the deeps of0-30cm, the improvement degree was largest in the deeps of10-20cm, the amount of coarse sand grains reached up to3.19%. The soil moisture content below20cm in the Salix forest was lower than that in the bare sand dunes. The contents of organic matter, alkali-hydrolysable nitrogen and available phosphorus of Salix were larger than that of bare sand dunes. The organic matter amount and available nitrogen had an outstanding difference in the deeps of0-10cm and10-20cm, available phosphorus had an outstanding difference under20cm soil layer, while the difference of available phosphorus was largest in the deeps of30-40cm, rapidly available K was largest in the deeps of30-40cm.(4)The wind prevention benefit was as follows:the degree of roughness of the surface soil layer was clearly larger than that of the bare sand dunes. Wind speed profile of the Salix forest changes complexly, which presents S change trend, while wind speed profile of the bare sand dunes changes easily. That means the windbreaks of the three hillsides of the windward slopes in the height of0-50cm were the strongest. As the height increased, the windbreaks of the salix under the technology of the hydrodynamic S=shock got weaker and weaker.