41 results about "Broad-leaved tree" patented technology

The invention relates to the technical field of forest tending, in particular to a structure regulation and control method for a pinus yunnanensis low-efficiency forest. The pinus yunnanensis low-efficiency forest structure regulation and control method comprises the following steps that ecological thinning is conducted on a pinus yunnanensis low-efficiency forest region, broad-leaved trees are planted in an intermediate cutting zone in a complementary mode according to the mixing proportion of 30% or below, and pinus yunnanensis lateral branches are pruned. According to the structure regulation and control method, good growth of the Yunnan pine forest is promoted, the diameter order range of the forest stand is expanded, the forest stand is converted into a needle-broad mixed different-age forest stand, the forest stand is gradually transited to random distribution or cluster distribution, the complexity and diversity of a natural ecological system can be better reflected, optimization of a forest stand space structure is promoted, and the economic benefit is increased. And a condition and a basis are provided for realizing a multifunctional effect of the forest.

The invention provides a method for mixing germinated Chinese fir forests and broad-leaved trees, and belongs to the technical field of forest management. The invention provides a method for mixing sprouted cedarwood forests and broad-leaved trees, which comprises the following steps: selecting local suitable evergreen broad-leaved trees for complementary planting according to the principle of suitable trees and mutualism of organisms to form mixed forests, improving forest stand structures, restoring biodiversity, promoting and improving ecological system structures and function restoration, promoting sustainable management of forests, and improving the survival rate of the forests. The method has scientificity, operability and demonstratability, and obtains economic benefits which can be accepted by forests and farmers.

The invention discloses a progressive structure adjustment, quality-improving cultivation and actual performance evaluation method for a needle-leaved pure forest. The method comprises the following steps: (1) on-site treading; (2) dividing an operation area; (3) crown boundary falling; (4) thinning old forests; (5) width reinforcement and forest cultivation; and (6) carrying out actual effect evaluation. According to the method, structure adjustment and tree species updating of the artificial needle-leaved pure forest are implemented step by step and purposefully through a series of working procedures, and on one hand, the species diversity of the needle-leaved forest and the forest appearance landscape are remarkably improved through gradual supplementation of broad-leaved tree species; and on the other hand, forest endoplasm transformation and community optimization are accelerated by thinning old and cultivating young animals and improving soil, the forest productivity and the forest ecological service function are remarkably improved, excellent forest habitat, reasonable structure, good function and benefit improvement are promoted, and excellent inhabiting and nursing conditions are provided for various wild animals.

The invention relates to the technical field of fungus material culture, and particularly discloses a fungus material culture method of armillaria mellea for artificial cultivation of gastrodia elata, which comprises the steps of fungus material selection, culture medium preparation, inoculation, culture shelf arrangement, environment arrangement, harvesting and gastrodia elata planting. According to the method, hard and corrosion-resistant broad-leaved tree species are selected as the fungus material, a composite culture medium formula is adopted, namely, the advantages of a liquid culture medium and a solid culture medium are combined, comprehensive and balanced nutrition support is provided for growth of armillaria mellea, the culture efficiency and quality of the fungus material are improved, meanwhile, the proportion of the formula of the culture medium is designed, and the culture cost is reduced. The water content and the pH value of the culture medium are controlled, favorable growth environment conditions are created for growth of armillaria mellea, meanwhile, a syringe or an inoculating loop for high-pressure steam sterilization effectively prevents contamination of infectious microbes, and the success rate of inoculation and the purity of hyphae are improved.

The invention belongs to the technical field of plant tissue culture, and particularly relates to a culture medium for germination of paphiopedilum seeds, application of the culture medium and a method for germination of the paphiopedilum seeds, in particular to application of a broad-leaved tree fallen leaf ash water extract in the culture medium for germination of the paphiopedilum seeds. The broad-leaved tree fallen leaf ash water extract is applied to paphiopedilum seed germination, the seed germination rate can reach 83.7 + / -4.7 (%), germination of the paphiopedilum seeds is effectively promoted, and meanwhile the germination culture cost can be reduced.

The utility model provides an absorptive article. The absorbent article (1) has a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, and is provided with an absorbent core (11) having pulverized fibers, the absorbent article (1) being characterized in that broad-leaved tree fibers formed from broad-leaved trees are included in the pulverized fibers, and an oil agent (Y) that promotes the diffusion of excreta is provided in the absorbent core (11). In either the longitudinal direction or the width direction, when the absorbent core (11) is divided into three equal parts, one side part, a central part and the other side part are sequentially arranged from one side, and the weight per unit area of the oil agent (Y) arranged in the central part is higher than the weight per unit area of the oil agent arranged in the one side part.

The invention belongs to the field of forest investigation, and particularly relates to an efficient woody oil biomass measurement method, which comprises the following steps of: analyzing R / S value by adopting fallen standard wood, calculating wood volume by other nursery stocks according to a broad-leaved tree binary wood volume formula, determining biomass per unit wood volume by collecting samples, and further calculating the total biomass so as to realize the purpose of efficiently obtaining the biomass.

The invention discloses a method for quickly constructing a choerospondias axillaris mixed forest with a near-natural community structure, which comprises the following steps: by taking an existing natural secondary forest as an operating object, simulating a local top-level forest mode, selecting forest land, selecting tree species, constructing a construction mode and cultivating and managing. The method comprises the following steps: properly thinning and tending, complementarily planting choerospondias axillaris in a forest window, effectively maintaining the soil fertility and quickly recovering a community structure by utilizing the characteristics that the choerospondias axillaris grows quickly and has a large amount of fallen leaves, and performing organic matter coverage and community density regulation and control on target broad-leaved trees. The problems that traditional secondary forest transformation is large in risk, poor in structural stability, low in economic benefit and the like are solved. A local top-level forest mode is simulated, a community composed of an arbor layer I mainly comprising a deciduous plant choerospondias axillaris and an arbor layer II mainly comprising a lauraceae plant evergreen broadleaf plant is rapidly built, the optimal community recovery mode of a natural forest is achieved, the purposes of short recovery period, large annual growth and stable community growth are achieved, the production cost is reduced, and the economic benefit is increased. Wide production and application prospects are realized.

The invention provides a method for preparing a camellia oleifera forest soil conditioner and a soil organic fertilizer based on indigenous flora and application of the method, and belongs to the technical field of microorganism utilization. According to the method, indigenous microorganisms captured from soil without fertilization interference under old camellia oleifera forests and healthy camellia oleifera trees in a germplasm resource nursery of more than one hundred years and indigenous microorganisms captured from broad-leaved forest or bamboo forest soil in a natural ecological system are combined according to a specific proportion; the oil-tea camellia forest soil conditioner or the oil-tea camellia forest soil organic fertilizer obtained through propagation culture can quickly improve and restore the oil-tea camellia forest soil in hills and mountainous areas and remarkably improve the yield and quality of oil-tea camellia seeds, is a solution based on nature, and is economical, practical, efficient, green, environmentally friendly and sustainable.

The invention relates to the technical field of artificial domestication and cultivation of edible fungi, in particular to a wild tremella aurantialba artificial domestication and cultivation solid culture medium which comprises the following components in percentage by mass: 45-60% of broad-leaved tree decomposed sawdust, 15-25% of cottonseed hull, 8-12% of wheat bran, 3-5% of corn flour, 1-2% of cane sugar, 1-1.5% of calcium carbonate, 0.2-0.4% of monopotassium phosphate, 0.1-0.2% of magnesium sulfate, 0.05-0.1% of a compound activator and the balance of water. According to the culture medium, the raw material ratio is specifically optimized, the rotten broadleaf sawdust is selected to be matched with the cottonseed hulls, the rotten wood environment for growth of the wild tremella aurantialba is simulated, meanwhile, the composite activating agent is added, the co-living property of tremella aurantialba hyphae and associated stereum hirsutum is enhanced, the planting rate of the wild tremella aurantialba hyphae can reach 96% or above and is increased by 15%-20% compared with an existing conventional culture medium, and the yield of the wild tremella aurantialba hyphae is increased by 90% or above. The problems of difficult field planting and low survival rate in the initial domestication stage of wild tremella aurantialba are solved.

This invention discloses a method for cultivating Ganoderma lucidum using pine sawdust as a substrate, belonging to the field of edible and medicinal fungi cultivation technology. This invention uses pine sawdust and decayed pine sawdust as the main cultivation materials, combined with rice bran and various nutrient supplements to prepare a special culture medium. The total triterpenoid content of the cultivated Ganoderma lucidum can reach up to 1.408%, which is 2.01 times that of conventional broadleaf tree sawdust culture medium and 2.56 times that of straw culture medium. This invention not only improves the medicinal quality of Ganoderma lucidum but also realizes the high-value utilization of agricultural and forestry waste such as pine and fir sawdust, alleviating the pressure of raw material shortage in the edible and medicinal fungi industry, reducing production costs, and is suitable for large-scale promotion and application.

The invention discloses an unmanned aerial vehicle laser radar point cloud-based broad-leaved tree branch structure reconstruction method. The method comprises the steps of obtaining an unmanned aerial vehicle laser radar point cloud of a broad-leaved tree body in a defoliation period; dividing the unmanned aerial vehicle laser radar point cloud into a plurality of voxels; selecting a point closest to the gravity center of the voxel in the voxel as a skeleton point; establishing a connected graph; reconstructing a material transportation path from the tree root point to each skeleton point; extracting a branch tip point; extracting a substance transportation path from a tree root point of the broad-leaved tree to the highest branch tip point as a primary branch skeleton, and extracting substance transportation paths from other branch tip points except the highest branch tip point to the primary branch skeleton as candidate secondary branch skeletons; extracting a secondary branch skeleton; optimizing the first-stage branch skeleton and the second-stage branch skeleton by using a recursive smoothing method to obtain an optimized first-stage branch skeleton and an optimized second-stage branch skeleton; and branch structure parameters of broad-leaved trees are extracted. According to the method, the branch structure of the broad-leaved tree can be efficiently and accurately reconstructed.

The invention discloses a ganoderma lucidum cultivation method based on a taxus chinensis substrate, which comprises the following steps: S1, substrate preparation: uniformly mixing the following components in percentage by weight: 20-35% of crushed taxus chinensis branches and leaves, 10-20% of taxus chinensis bark extraction residues, 20-25% of inonotus obliquus leavening, 10-15% of slow-release nutrition bags, 10-20% of broad-leaved tree sawdust and 5-10% of auxiliary materials to obtain a basic substrate; s2, substrate pretreatment: sequentially carrying out stepped enzymolysis, directional fermentation and microwave-assisted extraction treatment on the basic substrate to obtain a pretreated substrate; s3, cultivation management: putting the pretreated substrate into a cultivation container, inoculating ganoderma lucidum strains in a laminated manner, and sequentially performing environment regulation and control in a hypha growth stage, a sporocarp differentiation stage and a sporocarp growth stage to cultivate ganoderma lucidum; and S4, harvesting: when white growth circles on the edges of the ganoderma lucidum sporocarp disappear, pilei are uniform in color and spores start to be ejected, harvesting the sporocarp, and completing ganoderma lucidum cultivation.

The invention belongs to the technical field of remote sensing data processing, and provides a remote sensing inversion method and system for the leaf area index of a coniferous and broad-leaved mixed forest and application, and the method comprises the steps: obtaining spectral data and observation geometric parameters of the coniferous and broad-leaved mixed forest in a research region; acquiring optical element characteristics of coniferous tree species and broad-leaved tree species matched with the remote sensing image wave band; based on observation geometric parameters, optical element characteristics and canopy structure parameters, forward simulation is carried out in combination with a forest heterogeneous canopy random radiation transfer model, a canopy reflectivity lookup table is generated, and the canopy structure parameters comprise a needle-broad mixing ratio with a plurality of discrete gradient values; screening an optimal solution set from the canopy reflectivity lookup table based on a dual-band differential error threshold and inverting a leaf area index; and performing inversion uncertainty and inversion precision evaluation on the inversion leaf area index by adopting a statistical index. The method is high in inversion precision and success rate, and the inversion result can be quantified and is high in reliability.

This invention provides a high-yield method for cultivating *Agaricus bisporus* under forest cover in northern China, relating to the field of edible fungi cultivation technology. The method includes the following specific steps: Step 1: Preparation of the planting substrate. By weight percentage, select 50% whole threshed corn cobs, 15% rice husks, 10% broadleaf tree sawdust, and 25% pre-fermented cow and sheep manure, and prepare the materials for later use. Step 2: Substrate pre-fermentation treatment. In northern regions, pre-fermentation begins in early April. Cow and sheep manure is piled up for pre-fermentation one month in advance. When the pile temperature reaches 60℃, it is turned over, and a total of three turns are performed to complete the pre-fermentation. This invention provides a high-yield method for cultivating *Agaricus bisporus* under forest cover in northern China, making full use of local agricultural and forestry waste and idle forest resources. Through optimized substrate formulation, standardized fermentation control, and a dual-cycle fruiting mode adapted to the northern climate, it achieves high-yield, high-quality, and long-cycle cultivation of *Agaricus bisporus*.

The present invention addresses the problem of providing a fluff pulp board capable of forming a fluff pulp (fluff pad) in which the liquid backflow rate is sufficiently reduced. The invention relates to a pulp board for fluff pulp, which comprises broad-leaved tree pulp and is described in (A) to (D) below. (A) A fluff pulp board in which the content of broad-leaved tree pulp relative to the total pulp component is 25 mass% or more, and the total content of straight-chain fatty acids having 24, 26, and 28 carbon atoms is 300-1000 ppm. And (B) a fluff pulp board in which the xylan content is 20 mass% or less and the Canadian standard freeness of the dissociated pulp is 400-640 mL. And (C) a fluff pulp board in which the proportion of the number of fibers weighted at a length in the range of 0-0.1 mm in the length-weighted fiber length distribution is 10% or less. And (D) a fluff pulp board in which the fiber roughness measured by dissociating the fluff pulp board is 0.030-0.120 mg / m.

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 invention discloses a seedling raising method for a Chinese fir broad-leaved tree multi-layer mixed forest, and belongs to the technical field of forestry seedling raising. Aiming at the technical problems that the fir and the broad-leaved tree have malignant competition and are difficult to form symbiotic relationship during mixed cultivation, a double-cavity integrated symbiotic cultivation container is adopted, a degradable isolating membrane is arranged in the container, and the fir and the broad-leaved tree are respectively placed in special functional matrixes of a main cavity and an auxiliary cavity for cultivation. Physical isolation is performed in the early stage of seedling raising, and the isolation film is degraded in the later stage to guide root system interweaving to form co-rooting lumps. According to the method, interspecific competition is effectively solved, and the survival rate and the growth amount of broad-leaved trees are remarkably increased through the cultivated integrated symbiotic seedlings.

The present application relates to the technical field of plant phenotype measurement, and discloses a broad-leaved tree seedling phenotype measurement method, system, device and medium, which comprises the following steps: acquiring a side view and a top view of the broad-leaved tree seedling, obtaining a mask of the broad-leaved tree seedling in the side view and a mask of leaves in the top view through an improved Unet model, obtaining an image containing only the mask of leaves and an image containing only the mask of branches and trunks by using an HSV color threshold segmentation method, obtaining an image containing a complete mask of branches and trunks through an image restoration model, performing skeletonization and deburring treatment on the complete mask of branches and trunks, obtaining pixel measurement values of broad-leaved tree seedling phenotype parameters, and inverting the pixel measurement values by using a reference calibration method to obtain actual prediction values of the broad-leaved tree seedling phenotype parameters. The present application can accurately, quickly, non-destructively and at low cost measure broad-leaved tree seedling phenotype parameters, and can provide effective data reference for researches such as broad-leaved tree seedling cultivation and growth monitoring.

The purpose of the present invention is to provide: a base paper used for translucent paper obtained by impregnation with a transparent resin; a translucent paper using the base paper; and a method for producing translucent paper. The raw paper for the translucent paper takes coniferous tree chemical paper pulp and broad-leaved tree chemical paper pulp as main components, the ratio of the coniferous tree chemical paper pulp to the broad-leaved tree chemical paper pulp is 75: 25-51: 49, the gram weight of the raw paper for the translucent paper is 40g / m < 2 >-100g / m < 2 >, and the air permeability of the raw paper for the translucent paper is 10-40 seconds.

The invention discloses a deep learning automatic tree species classification method based on a remote sensing image, relates to the technical field of remote sensing image processing, and solves the problems that an existing tree species classification method excessively pays attention to a single-label tree species classification task, neglects hierarchical multi-label tree species classification, and cannot realize high-precision tree species classification through layering of labels. The method comprises the steps of constructing hierarchical tree species classification data sets of different scales, constructing a hierarchical tree species classification model, evaluating the mobility of the hierarchical tree species classification model and the like. According to the method, the tree species classification accuracy is improved by utilizing the label hierarchical structure information of the constructed hierarchical multi-label data set; by means of dynamic adjustment of a converter on prediction and collaborative operation of a classifier in a hierarchical tree species classification model, misclassification between coniferous and broad-leaved trees is reduced, and errors of overall classification are jointly reduced. According to the method, the hierarchical tree species classification model is utilized to tree species data sets with different scales, and good generalization of the hierarchical tree species classification model is proved.

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 simulating wood formation and radial growth of broad-leaved trees by using climate data and belongs to the technical field of tree growth prediction. In order to solve the problem of accurate simulation of wood formation and radial growth of broad-leaved trees, the application comprises the following steps: collecting input data including latitude data of a target region and long-term daily meteorological data of the target region; establishing cambium activation conditions of the broad-leaved trees; calculating relative growth rates of cell expansion, cell wall deposition and cambium cells, and calculating expansion rates of the cambium cells; establishing a cambium cell division model and a vessel cell differentiation cycle model; establishing a cell expansion model and a cell wall thickening model, simulating the growth process of the cells in the xylem until the cell wall lignification process is completed, and then the cells enter a mature cell stage; and based on the mature cell stage, calculating annual ring width and anatomical characteristics, and completing the simulation process of simulating the wood formation and radial growth of the broad-leaved trees by using the climate data.

The utility model discloses a rapid seedling raising device for broad-leaved tree tissue culture seedlings, relates to the field of the broad-leaved tree tissue culture seedlings, and aims to provide the rapid seedling raising device for the broad-leaved tree tissue culture seedlings, which is convenient for rapid seedling insertion and is prevented from being damaged. The rapid seedling raising device for broad-leaved tree tissue culture seedlings comprises a seedling raising cup cover body and seedling raising inserts, the seedling raising cup cover body comprises a first seedling raising cover and a second seedling raising cover, and the second seedling raising cover and the first seedling raising cover are installed on the left side and the right side of the top end of a seedling raising cup respectively. Limiting pieces are fixedly connected to the tail ends of the limiting rods, limiting frames are fixedly connected to the bottom end of the second seedling raising cover, reserved grooves are formed in the opening and closing ends of the seedling raising inserts, anti-skid sleeves are arranged on the outer sides of the handheld ends of the seedling raising inserts, rubber rings are fixedly connected to the inner sides of the handheld ends of the seedling raising inserts, and arc-shaped notches are formed in the first seedling raising cover and the second seedling raising cover.

The utility model is suitable for the technical field of gastrodia elata planting, and provides a soil fattening machine for gastrodia elata planting. The rectangular opening is formed in the bottom plate; the discharging opening is formed in the bottom plate; the frame is fixedly mounted on the bottom plate; the discharging mechanism is used for putting broad-leaved tree leaves or humus soil into the planting pits; the leveling mechanism is located at the bottom of the frame and used for leveling the bottom of the planting pit; and the displacement mechanism is mounted on the frame and is used for driving the leveling mechanism to move transversely and vertically. The soil fattening machine for gastrodia elata planting not only can fatten soil in the gastrodia elata planting process, but also has the function of leveling the bottom of the planting pit, can adjust the transverse position of the soil leveling structure, and is suitable for planting pits with different widths.

The invention provides an uncaria stem ganoderma lucidum culture medium and a culture method, and belongs to the technical field of edible fungus culture. The uncaria stem ganoderma lucidum culture medium comprises the following components in percentage by mass: 75-85% of uncaria stems, 14-22% of wheat bran, 0.5-2% of gypsum and 0.4-1.4% of glucose. The uncaria stem chips are taken from clustered main branches of uncaria plants 20-30 cm away from the ground, and the particle size of the uncaria stems is 4-8 mm. The uncaria stems are used as the ganoderma lucidum culture medium, the yield of ganoderma lucidum can be remarkably increased, and compared with broad-leaved tree sawdust culture, the ganoderma lucidum yield of the uncaria stems is 61% higher than that of the latter. The method for planting the ganoderma lucidum under the forest is adopted, the cultivation positions of the mushroom sticks are reasonably controlled, forest land resources are fully utilized, the comprehensive utilization rate of land is increased, the growing environment for planting the ganoderma lucidum is closer to the nature, and accumulation of effective components and quality improvement of the ganoderma lucidum are facilitated.

The invention relates to the technical field of forest building, and discloses a method for improving the quality of needle-leaved dominant tree species needle-broadleaf mixed forest, which comprises the following steps: step 1, the forest is cultivated needle-broadleaf mixed forest, the different-age multi-layer composite forest stand corresponds to a needle-leaved pure forest quality improvement mode, and the needle-leaved pure forest quality improvement mode corresponds to the needle-leaved pure forest quality improvement mode; the forests are divided into coniferous dominant tree species and coniferous broad-leaved mixed forests, the broad-leaved dominant tree species and coniferous broad-leaved mixed forests correspond to the quality improvement mode of the coniferous broad-leaved mixed forests, the forests are divided into broad-leaved mixed forests correspond to the quality improvement mode of broad-leaved pure forests, and the broad-leaved mixed forests which are divided into mature forests or degraded forests correspond to the transformation mode of coniferous low-efficiency forests; 2, on the basis of the coniferous pure forest quality improvement mode in the step 1, a quality improvement mode is formed by replanting deciduous broad-leaved tree species with the retention density of 111 plants per mu; the quality improvement mode of the coniferous and broad-leaved mixed forest is to adjust a stand structure and a growth space; the broad-leaf pure forest upgrading mode is to adjust a stand structure; the coniferous low-efficiency forest transformation mode refers to complementary planting of indigenous tree species. The improvement of the quality of the reformed forest stand and the high-quality forestry management development direction are greatly improved.

The invention belongs to the technical field of vegetation recovery, and particularly relates to a near-natural vegetation recovery method for northern stone mountainous regions. The near-natural vegetation recovery method for the northern stony mountain land comprises the following steps: recovering shrub and grass vegetation: after leguminous grass and shrub plants grow, forming a shrub and grass zone in each planting ditch; planting arbor: selecting cultivated one-year-old arbor nursery stocks with robust root systems, and planting the nursery stocks; the leguminous grass and shrub plant seeds comprise leguminous grass and shrub plant seeds and leguminous shrub seeds; the varieties of one-year-old arbor nursery stocks with robust root systems comprise coniferous tree species and broad-leaved tree species. According to the near-natural vegetation recovery method for the northern stony mountain land, the afforestation survival rate is increased, the water and soil conservation function is improved, the afforestation cost is reduced, and plant communities are stable.

The application provides a method for screening broad-leaved tree species suitable for mixed planting with Chinese fir, and belongs to the technical field of forest management. The Chinese fir and the broad-leaved tree are mixed for afforestation, and a pure Chinese fir forest is simultaneously built as a yield measurement control. By comparing the accumulations of the Chinese fir / broad-leaved tree mixed forest and the pure Chinese fir forest, the growth amounts of the single-tree volume of the Chinese fir in the Chinese fir / broad-leaved tree mixed forest and the single-tree volume of the pure Chinese fir forest, and the yield rates of the large and medium-sized timber species of the Chinese fir in the Chinese fir / broad-leaved tree mixed forest and the pure Chinese fir forest, the broad-leaved tree species suitable for mixed planting with the Chinese fir are finally screened out. The Chinese fir is mixed with the broad-leaved tree species screened out by the method, so that the timber yield and the yield rate of the large and medium-sized timber species of the Chinese fir plantation can be improved, the stand growth is excellent, the production demand for the Chinese fir under the existing condition can be effectively met, the economic benefit and the ecological benefit are high, and the method has a wide application prospect.