30 results about "Biological soil crust" patented technology

The invention relates to a method for distinguishing biological soil crust and subsoil basic respiration of biological soil to test the contribution of components (biological soil crust and subsoil basic respiration) of soil to the soil respiration. The method comprises the following steps that firstly, a biological soil crust layer is carefully separated from the soil surface and arranged in a screen with 150 meshes, the subsoil of the biological soil crust is heated for 3 h at the high-temperature of 160 DEG C, and after the subsoil temperature recovers to the indoor temperature, the screen with the biological soil crust layer is placed in the soil surface layer. The method has the advantages that operation is easy, separation is carried out through a physical method and is thorough, pollution does not exist, and cost is low; according to the method, the soil water content of components of the soil cannot be changed after natural raining, a processed soil sample testing environment is close to natural conditions, and the accuracy of the test result is high; the interference in soil is small, and the measurement result is close to the real value; continuous monitoring can be carried out under the field condition. By means of the method, the soil respiration rate that the biological soil crust covers the components of the soil can be accurately tested.

The invention relates to composition for ecological restoration using of barren land including alga, culture medium of the alga, soil fixing agent and ultra water absorbing materials, and a method for restoring the degraded ecology by them. According to the invention, biological soil crust can be formed in a short time; desertization and yellow sand can be avoided; waste coal mine and oil polluted land are improved into an ecological environment suitable for growth of plants; and ecological and environmental pollution caused by desert, waste coal mine and oil polluted land can be avoided.

The invention provides a method utilizing biological soil crust to prepare coagulant aids. According to the method, the biological soil crust is utilized as main raw material, and a series of processing is conduced to the biological soil crust to obtain the coagulant aids used for sewage treatment. The method has the advantages of being environment-friendly and obvious in coagulation aid effect.

The invention relates to a dry desert zone sand binder planting method. The survival rate of all kinds of sand binders is 70 percent or more in the dry desert regions with the annular precipitation ranging from 100 mm to 250 mm through sand face fixing, plant species selecting, planting density determining, planting mode selecting and seedling managing. The planted sand binders are planted along with deposition of falling dust on the surface of sand dunes, settlement of therophytes and growing of biological soil crusts are promoted, and long-term effective fixing of the sand dunes is guaranteed. By means of the sand binder planting method, the survival rate of the sand binders is guaranteed, the labor and seedling cost is reduced, and the purposes of preventing wind and fixing sand are achieved on the premise of maintaining the water balance.

The invention discloses a method for measuring algal biomass in biological soil crusts, and relates to the field of biology. The method comprises the steps of algae crust sample sampling, sieving, cleaning, algae cultivation, determination of chlorophyll a and b, standard curve drawing and algae biomass (natural growth) determination. Among them, the algae culture is cultivated with BG11 medium, and the algae used are mixed algae; the determination of chlorophyll a and b adopts the mixed solution method to extract chlorophyll (extraction solution: absolute ethanol: acetone: water = 4.5:4.5:1); standard curve The relationship between the total amount of chlorophyll a and b and algae biomass was regressed; the determination of the biomass of naturally growing algae was converted by the standard curve between the total amount of chlorophyll a and b and the biomass of cultured algae. The invention realizes the direct comparison between the algae crust and the vascular plant biomass, and provides a reliable way for more accurate calculation of the algae crust productivity and its function in the ecosystem.

This invention relates to new consolidation sand method with terraneous nitrogen fixation blue-green algae, which is completed by the following steps: blue-green algae foster, inoculation environment, inoculation time and inoculation quantity, and it uses the microorganism technology such as terraneous nitrogen fixation blue-green algae to achieve the fast consolidation of the flowing sand in the fixed and the half fixed desert area and achieve the ecology rehab in the engineering trouble area of the fixed and half fixed desert area. The applied nitrogen fixation blue-green algae can do photosynthesis by itself by the limited precipitation in desert, it grows up, and produces hull, which achieves the purpose of adding organic matter in soil and improving the structure of the soil and preventing and consolidating sands.