13 results about "Karst rocky desertification" patented technology

The application relates to the technical field of remote sensing mapping, in particular to a remote sensing mapping method for a karst rocky desertification treatment grassland, which comprises the following steps: obtaining remote sensing images and DEM data of a target karst region; quantifying the shadow shielding possibility, vegetation confidence and vegetation density of a pixel based on the radiation brightness, spectral reflectance change trend of the remote sensing images and DEM topographic features, and then adaptively constructing an adjustment factor for correcting a soil-adjusted vegetation index; and calculating the soil-adjusted vegetation index at each pixel according to the adjustment factor, so as to draw a remote sensing vegetation map of the target karst region. The adjustment factor is adaptively determined by constructing a shadow vegetation characteristic value, the problem that the existing technology cannot distinguish between dense shadow vegetation and bright sparse vegetation under the complex karst topography due to the use of a unified adjustment factor is solved, and the precision and reliability of vegetation mapping in a karst rocky desertification treatment area are improved.

The invention relates to the technical field of remote sensing monitoring and ecological evaluation, in particular to a karst rocky desertification evolution identification method fusing an ecological process. The method comprises the following steps: acquiring a suitable detection height of a detection area according to a proportion condition of pure pixels in an image acquired by remote sensing at different heights and an overall pixel purity index; the method comprises the following steps: determining a rocky desertification comprehensive evolution index based on remote sensing data, analyzing a rocky desertification change degree, establishing a prediction model, and judging the influence degree of different driving factors on the current rocky desertification evolution process according to the difference between a prediction result and an actual result and the influence caused by the change of the different driving factors. And finally, generating a stony desertification evolution diagram and a stony desertification risk zoning diagram. According to the method, stony desertification static monitoring in the past is converted into dynamic evolution analysis, and deep understanding of stony desertification evolution trend from representation to mechanism is realized.

The patent application discloses a kind of karst mountain ecological restoration and landscape construction method, specifically related to ecological restoration field.The method comprises the following steps: selecting robust chamaepericlymenum cutting seedling for standby;selecting karst mountain foot, roadside and bare rock area with soil in stone pit as planting point;before spring bud sprouting, do not loosen soil ball to remove nutrient bag, after returning to soil, pruning, and pouring through rooting water;after 1 month, carry out weeding, soil loosening, fertilization, and management and protection.Planting in the first year of reproductive growth, pruning and pruning after the first year, and in the second year, before spring bud sprouting and after flowering, pruning is carried out once, and after pruning and during flowering, management and protection are carried out.The technical scheme of the application can achieve the effect of full plant type, row planting and full tree golden flowers for chamaepericlymenum in more than one year after planting, and solves the problem of how to restore and landscape the karst rocky desertification mountain with thin soil layer and easy water and soil loss, and quickly realizes the dual effect of karst ecological restoration and landscape construction.

The invention provides a karst rocky desertification side slope ecological restoration method which comprises the following steps: selecting a rocky desertification side slope region, generating a spherical region range based on geographic coordinates, and recording center coordinates of a target side slope; the method comprises the following steps: acquiring vegetation coverage, height and type distribution data based on remote sensing data and field sampling, and acquiring wind speed, wind direction, soil element distribution, precipitation, runoff, vegetation seed bank quantity, seed bank soil humidity, seed particle size distribution and type distribution data at the same time; generating a wind power field function according to the wind speed and wind direction data, analyzing the soil element content, calculating the total rainwater amount and the total runoff amount, and generating the number of effective vegetation seeds; integrating the parameters to construct a carbon sequestration and slow release model, and outputting a carbon cycle model. According to the method, the carbon sequestration capability of the karst rocky desertification slope ecosystem can be accurately evaluated, the dynamic monitoring and optimization of the ecological restoration effect are realized, and the ecological restoration efficiency and the regional ecological stability are improved.

The present application relates to remote sensing image processing and geographic information system technical field, disclose a kind of based on lithology background and land use preprocessing Karst rocky desertification remote sensing interpretation method, comprising: S1: based on the logical constraint preprocessing of lithology background and land use, generate three types of output area, including: effective interpretation area, exclusion area, and non-karst area;S2: adaptive spatial preprocessing is carried out to effective interpretation area, using multi-scale fusion filtering and through the closed-loop adjustment driven by image quality index, output final preprocessing image;S3: in the effective interpretation area of final preprocessing image, using improved CART decision tree is classified;S4: the classified result is post-processed, and then the classified result after post-processing is spliced with the exclusion area and the non-karst area that have been assigned, to generate the final rocky desertification spatial distribution map.The present application significantly improves the accuracy and efficiency of Karst rocky desertification interpretation.

The invention discloses a method for ecologically preventing and controlling eupatorium odoratum invasion and recovering local vegetation in a karst rocky desertification mountainous area, and belongs to the technical field of prevention and control of alien invasive plants. The method comprises the following steps: planting local plants which are slightly inhibited by allelopathy of the eupatorium odoratum in the early growth stage of eupatorium odoratum seedlings in a region with dominant eupatorium odoratum in the karst rocky desertification mountainous area; during planting, the number of species of the local plants is controlled to be 7, 9 or 10, the planting density of the local plants is 1-3 plants / m < 2 >, and the mixed planting ratio of the local plants to the fragrant eupatorium herb is (0.24-1.4): 1. By adopting the method disclosed by the invention, the effects of effectively controlling the growth and spreading of the fragrant eupatorium herb and recovering the local facies can be achieved in a relatively short time at a lower mixed planting ratio.

The invention belongs to the field of microorganisms, and discloses a strain of Coelastrus sp. LC8 separated from biological crust soil in a karst rocky desertification region, and the preservation number of the strain is CGMCC No. 41199. The starry-sky algae are high in growth and reproduction speed and high in exopolysaccharide content and soluble protein content, and after algae liquid prepared from the algae species is applied to barren sandy soil and loam, the soil water-retaining property can be improved, the soil erosion resistance can be enhanced, soil nutrients can be improved, and the soil carbon sequestration capacity can be improved. In addition, the application of the algae liquid can promote plant growth and nutrient absorption, so that the algae liquid is combined with the plants to perform efficient ecological restoration and treatment on the degraded land. The application of the invention can reduce the application cost of ecological restoration engineering, is good for the environment, and realizes sustainable and healthy development of the ecological environment.

The invention discloses calcium-based biochar for improving karst rocky desertification soil as well as a preparation method and application of the calcium-based biochar, and belongs to the technical field of biochar materials and soil remediation. The preparation method of the calcium-based biochar comprises the following steps: collecting Chinese prickly ash shells, removing impurities, drying to constant weight, crushing and sieving to obtain Chinese prickly ash shell powder; the dolomite in the karst area is crushed, ground, dried and cooled to prepare the dolomite fine powder. Mixing the two materials, adding a starch binder and water to adjust the water content, and granulating and forming; pyrolyzing the particles in a nitrogen atmosphere, keeping at a constant temperature, cooling, soaking with hydrochloric acid, washing with water, and drying to obtain primary biochar; preparing bacillus mucilaginosus in a southwest karst area into a bacterial suspension, soaking the primary biochar in the bacterial suspension, performing constant-temperature adsorption, drying and sieving to obtain a final product. The calcium-based biochar is applied to karst rocky desertification soil and can supplement calcium, regulate acid, promote phosphorus conversion, improve the soil structure and optimize microbial communities, so that regional ecological restoration and agricultural sustainable development are promoted.

The invention discloses a research device and method for rock surface flow scouring erosion in a karst rocky desertification region, and belongs to the technical field of soil erosion and water and soil conservation research, and the research device comprises a surface runoff-sediment collection mechanism which is used for collecting runoff flowing along the surface and sediment carried by the runoff; the rock-soil interface flow-sediment collecting mechanism is used for collecting runoff flowing along the rock-soil interface and sediment carried by the runoff; and the simulated rock surface flow scouring mechanism is used for providing stable and controllable water flow for the test area. According to the invention, the surface runoff-sediment collection mechanism and the rock-soil interface flow-sediment collection mechanism are respectively arranged in the test area, so that the surface runoff formed in the scouring process and the runoff flowing along the rock-soil contact interface form an independent collection and drainage path in space; separation and collection of different runoff channels and sediment carried by the runoff channels are achieved, and interference to test results caused by mixing of runoff and sediment from different sources is avoided.

The invention discloses a karst artificial forest heterohabitat coupling regulation and weathering promotion near-natural restoration method. The method comprises the following steps: firstly, dividing an under-forest region of a man-made forest which grows slowly in a karst rocky desertification region into a soil microhabitat and a rocky microhabitat; in the soil microhabitat, a vertical structure of leguminous arbor-herbaceous plant-microorganism is constructed to optimize and complement a vegetation efficient growth system supplied with multi-source nutrients; in the stony microhabitat, a'pioneer woody-moss-lava bacteria 'rock weathering promoting and plant rapid planting system is constructed, and a moss layer is constructed through'matrix-adhesive agent-moss'. Through regulation and control of key nodes of plants and microbial networks, biochemical weathering of the karst carbonate rocks is accelerated, the utilization capacity of the plants on rock source nutrients is remarkably enhanced, and the problem that the stability of a man-made forest is restricted due to lack of water and soil resources in the karst region is solved; the stable succession of the artificial forest ecosystem growing slowly to the near-natural community is promoted.

The invention relates to the technical field of geological monitoring, in particular to a microorganism prediction method for monitoring, preventing and treating karst rocky desertification. Comprising the following steps: S1, respectively collecting land soil samples in a karst region and a non-karst region, and determining soil physicochemical properties including soil pH, soil total nitrogen, soil nitrate nitrogen, soil available phosphorus, soil total potassium, soil available potassium, soil exchangeable calcium, soil exchangeable sodium, soil chloride ion content and soil organic carbon; s2, the stony desertification succession process is analyzed through the vegetation coverage degree of the karst region, the correlation between the stony desertification succession process and the soil physicochemical properties is calculated, and the difference statistics of the soil physicochemical properties is obtained according to the correlation; s3, respectively extracting total DNA of the soil samples in each region, and analyzing to obtain composition characteristics of florae in the soil samples; s4, quantifying flora richness change through a specific measurement algorithm, and evaluating the stability of the microflora by adopting a parameter dispersion method; s5, taking bacteria and fungal species in the rocky desertification succession soil microbiome in the karst region and relative abundance in each corresponding sample as data, establishing an attribute feature set, and determining new biological indicator information based on an attribute data set; and S6, establishing a microorganism prediction model of karst rocky desertification monitoring control work.

The application relates to the technical field of remote sensing monitoring and ecological evaluation, in particular to a karst rocky desertification evolution identification method fusing ecological processes, which comprises the following steps: acquiring the suitable detection height of a detection area according to the proportion of pure pixels in images obtained by remote sensing at different heights and the overall pixel purity index size; determining a comprehensive evolution index of rocky desertification based on remote sensing data, analyzing the change degree of rocky desertification, establishing a prediction model, judging the influence degree of different driving factors on the current rocky desertification evolution process according to the difference between the prediction result and the actual result and the influence caused by the change of different driving factors, and finally generating a rocky desertification evolution map and a rocky desertification risk zoning map. The application aims to change the past static monitoring of rocky desertification into dynamic evolution analysis and realize deepened understanding of the evolution trend of rocky desertification from appearance to mechanism.

The invention relates to the technical field of tea cultivation, and particularly discloses a cutting propagation method and a cutting propagation device suitable for Karst regions. A biological acid leaching solution is prepared from moss in the karst rocky desertification area, and the biological acid leaching solution and a silicate microbial inoculum are cooperated to etch the cutting slips, so that the problem of calcium precipitation caused by alkaline water is solved; karst broken stones are calcined and modified and then mixed with fermentation residues, calcium carbonate precipitation is induced through microorganisms to construct an artificial aggregate matrix, and the problem of matrix collapse caused by alternation of wetting and drying is solved; calcium-philic alkali-resistant actinomycetes are separated from cavern bat dung, and are coated with sodium alginate karst polysaccharide composite gel to form the environment-responsive microcapsule, so that the problem of soil-borne fungal diseases is solved. The assorted device comprises a layered cutting bed composed of a perforated bamboo tube, a wavy supporting net and a seedling raising plate with conical holes, so that the cutting rooting rate of the awang tea is greatly improved, the incidence rate of root rot is greatly reduced, and a systematic solution is provided for breeding of characteristic crops in the karst region.