9 results about "Natural regeneration" patented technology

The invention discloses a forest dynamic growth model construction method and system, and belongs to the technical field of forestry digital twinning. According to the invention, through constructing the live-action three-dimensional model and carrying out refined modeling on the single plant, refined simulation and multi-dimensional prediction of the forest growth process are realized; a digital twinborn platform is utilized to integrate a forest simulation model and basic forest information, forest stand structure parameters are extracted, an arbor layer growth dynamic model is established, and then the species diversity and natural update density of a shrub layer are dynamically simulated. According to the method, the limitation of single plant scale is broken through, co-evolution of the arbor layer, the shrub layer and the natural updating layer is integrated for the first time, multi-dimensional prediction and visualization are supported, and scientific support is provided for forestry digital twinning.

The invention relates to the technical field of species distribution analysis, and discloses a dove tree population natural update limitation-based species distribution analysis system, which comprises a habitat factor acquisition module, an update limitation evaluation module, a distribution prediction module, a spatial constraint correction module and an adaptability atlas optimization module. The habitat factor acquisition module acquires data in real time and constructs a multi-layer environment factor topology; the update limit evaluation module evaluates update limit in combination with genetic diversity and seed diffusion constraint; the distribution prediction module generates a distribution strategy through spatial modeling and ecological niche optimization; the spatial constraint correction module corrects a diffusion range and genetic parameters based on terrain and climate factors; and the adaptability graph optimization module feeds back an analysis result to carry out closed-loop optimization on the strategy. The system is provided with a multi-stage obstacle avoidance mechanism and a redundant link, so that the habitat change response capability is improved. According to the method, accurate analysis and dynamic optimization of davidia involucrata distribution are realized, and technical support is provided for species protection.

The invention discloses a high-pressure propagation method for a branch of ormosia boluensis. The high-pressure propagation method comprises the following steps of: selecting an ormosia boluensis branch; belongs to the technical field of endangered plant asexual breeding. In order to solve the technical problems of extremely low survival rate (only 1-2 plants) and the like of the existing grafting, cuttage and other methods, a branch high-pressure propagation technology is successfully applied to the ormosia boularis for the first time, and nutrient soil is adopted, and a rooting solution and carbendazim are matched to serve as a rooting substrate; the girdling branches are wrapped with a high-pressure box, strict humidity control is carried out, and regular maintenance is carried out to induce rooting; during separation transplanting, the high-pressure soil wrapping ball is completely reserved to avoid damage to the root system; trimming and original habitat shading maintenance are assisted after transplanting. According to the method, the survival rate of the seedlings is successfully increased to 87.5%, vegetative propagation individuals of the boleo beans can be rapidly and efficiently obtained, and reliable technical support is provided for solving natural renewal obstacles of the boleo beans and achieving population rejuvenation and near depreciation of the boleo beans.

The application discloses a kind of forest dynamic growth model construction method and system, belong to forestry digital twin technical field.The present application is by constructing real scene three-dimensional model and carrying out single fine modeling, the fine simulation and multidimensional prediction of forest growth process are realized;Forest simulation model and forest basic information are integrated using digital twin platform, extract stand structure parameters, establish arbor layer growth dynamic model, and then the dynamic simulation of shrub layer species diversity and natural regeneration density is carried out.The present application breaks through the single scale limit, integrates the coordinated evolution of arbor layer, shrub layer and natural regeneration layer for the first time, supports multidimensional prediction and visualization, and provides scientific support for forestry digital twin.

The application relates to the technical field of ecological protection and restoration, and discloses a multi-star lily and competitive species interaction regulation and population natural renewal restoration method and system, which comprises the following steps: based on multi-period sample plot monitoring data, a multi-star lily-competitive species dynamic model containing non-integer time lag and nonlinear density index is established; nonlinear filtering is adopted to perform state online estimation on noise-containing monitoring data, and state estimation values and uncertainty measurements thereof are output; according to the state estimation values and the uncertainty measurements thereof, rolling optimization regulation and decision-making are performed through scene analysis and weight construction based on gradient difference; the natural renewal restoration potential is evaluated, and the grade of auxiliary measures is determined; and the restoration scheme is dynamically adjusted in a monitoring-estimation-decision-implementation-remonitoring closed loop. The application can be used for competitive regulation and ecological restoration of a multi-star lily degraded population in a karst mountain meadow, and the stability of the multi-star lily degraded population restoration is improved.

The invention discloses a method for artificially promoting natural renewal of cathaya argyrophylla, which comprises the following steps: forest stand thinning: properly cutting broad-leaved trees in cathaya argyrophylla communities, forming forest gaps around cathaya argyrophylla seed trees and under-forest saplings, and keeping the forest stand canopy density at 0.5-0.6 after cutting; litters on the vacant land in the forest windows are cleaned and stacked to the periphery of the seedlings of the cathaya argyrophylla saplings, the vacant land in the forest windows is loosened, and the soil loosening depth is about 2-3 cm; and tending management: cleaning miscellaneous irrigation weeds and pests which influence the growth of the seedlings around the cathaya argyrophylla saplings in the forest windows, and carrying out stump cultivation and topdressing. According to the method, forest gaps are formed through forest stand thinning, under-forest illumination is increased, and growth of the silver fir saplings is promoted; through manual soil loosening, the contact probability of the cathaya argyrophylla seeds and soil is increased, and the germination rate of the cathaya argyrophylla seeds is increased; meanwhile, through tending management, growth of the seedlings of the cathaya argyrophylla saplings is promoted, and the purpose of promoting renewal of the cathaya argyrophylla forest is achieved.

The present invention discloses a method for studying the impact of herbs on the natural regeneration of trees using high-coverage product, which relates to the field of forestry ecological technology. First, values are taken within the corresponding herb height range and coverage range, and the high-coverage product is obtained by multiplying the height mean value by the coverage mean value. A method for determining its appropriate range by associating and fitting the high-coverage product with the main target. The method of the present invention does not require complex sample analysis, only needs to control the height and coverage of herbs, does not need to consider the water content and types of herbs, nor does it need to carry out cumbersome work such as a large amount of vegetation cutting and weighing of herbs. It has a small workload, low investment cost, strong scientificity, environmental friendliness, and does not affect the growth of seedlings, and is of great significance for ecological restoration and vegetation management.

The invention discloses an artificial protection forest close-to-nature reconstruction method based on natural succession stage staging regulation and control, and the method comprises the steps: accurately judging the natural succession stage of a forest stand, and setting a threshold condition for transition to a next stage, so as to enable all reconstruction measures to be anchored to the development process of the forest stand; illumination and provenance are cooperatively regulated and controlled through forest window opening up and broad-leaved tree species complementary planting, and the under-forest natural updating potential is activated; through staged thinning, window expansion, width supplementation and needle control, the stand is guided to gradually turn from a single-layer same-age needle leaf structure to a different-age multi-layer, broad leaf dominated and plaque inlaid top-level community form; the litter reserves, the soil biological activity and the hydrological regulation capacity are synchronously improved, and a multi-layer protection system and a dynamic balance monitoring mechanism are constructed. The forest stand does not depend on continuous human intervention to maintain the function any more, but depends on succession power of the forest stand to achieve structural optimization and function jump, the succession stagnation problem is solved, and the artificial protection forest really has the stability, restoring force and sustainability of the near-natural forest stand.

The application discloses a method for artificially promoting natural regeneration of Tsuga chinensis, and comprises the following steps: forest thinning: removing broad-leaved trees in a Tsuga chinensis community, forming a forest gap around Tsuga chinensis mother trees and undergrowth seedlings, and retaining a canopy density of 0.5-0.6 after felling; artificial land preparation: cleaning and piling up litter on the ground in the forest gap to the periphery of the Tsuga chinensis seedling, and loosening the soil in the forest gap to a depth of 2cm-3cm; tending management: cleaning up weeds and grasses and harmful organisms around the Tsuga chinensis seedling in the forest gap, and performing seedling cultivation and topdressing. The method forms a forest gap through forest thinning, increases the forest understory light, promotes the growth of Tsuga chinensis seedlings, increases the contact probability of Tsuga chinensis seeds and soil through artificial soil loosening, improves the germination rate of Tsuga chinensis seeds, and promotes the growth of Tsuga chinensis seedlings through tending management, so that the purpose of promoting the regeneration of Tsuga chinensis forest is achieved.