10 results about "Larch" patented technology

This utility model discloses a constant temperature and humidity device for germinating larch seeds, relating to the field of seedling equipment technology. The utility model includes an insulated shell, with a storage mechanism fixedly connected to its inner cavity. A humidity-regulating component is fixedly connected to one side of the insulated shell, and a ventilation component is connected to the top of the insulated shell. The storage mechanism includes an inner shell disposed within the inner cavity of the insulated shell. This utility model, through the cooperation of the inner shell and the insulated shell, forms a double-layered insulated space, effectively reducing heat loss and ensuring stable internal temperature. The connecting plate, bracket, and tray design within the inner shell facilitates layered seed placement, not only improving space utilization but also ensuring good air circulation for each layer of seeds. A heater rapidly raises the internal temperature, and a lighting lamp simulates natural light conditions, providing suitable illumination for seed germination and helping to improve germination rate and quality.

The present application relates to a kind of efficient breeding methods of high resistance larch new germplasm of pine moth, including larch high resistance scion collection, rootstock selection and processing, grafting breeding and grafting management etc., in the process of high resistance scion seedling breeding, by scientific seed winter storage, sowing seedling and seedling management etc., to obtain a large number of healthy high resistance scion tender shoot provides guarantee. Scion uses the tender shoot of 10-15 days growth on seedling, and the high adaptability larch seedling of 10-15 days seedling stem straight thick, top bud full, root system developed, no disease and injury is selected as rootstock, so that grafting joint can heal quickly, shorten breeding cycle. After grafting, first grow in the environment very stable plant growth room for about 2 months, etc. Scion survival, transition period is transferred into greenhouse and grows for 1 year to reach healthy seedling, finally, further seedling raising in outdoor open-air test ground, so that seedling is fully lignified, thus a large number of high resistance pine moth larch seedling resources for artificial afforestation are obtained. The present application reduces the probability of occurrence of insect pests from the source, improves the insect resistance of larch itself, and improves the forest quality, growth rate and wood utilization efficiency.

This invention discloses a method for multi-gene aggregation breeding of larch and its application in cultivating new larch germplasm, lines, and varieties with excellent performance in terms of biomass, timber properties, and stress resistance. It includes the following steps: construction of a multi-gene aggregation expression backbone vector suitable for larch genetic transformation; cloning of genes regulating target traits such as biomass, timber properties, and stress resistance; construction of the multi-gene aggregation expression vector; larch genetic transformation, screening, and identification; and phenotypic observation and evaluation of the multi-gene-transferred larch materials. Results show that this method can introduce multiple target genes into larch recipient materials through a single genetic transformation, significantly improving the breeding efficiency of obtaining transgenic larch materials with excellent comprehensive traits. This method is of great value in overcoming the breeding bottlenecks of long larch growth cycles and a lack of precise techniques for synergistic improvement of multiple traits, and in the targeted and efficient cultivation of larch materials with excellent comprehensive traits.

The invention discloses a larch single tree segmentation and phenotype extraction method based on unmanned aerial vehicle multi-source remote sensing, and relates to the technical field of forestry remote sensing. The method comprises the following steps: firstly, synchronously acquiring visible light, a multispectral image and laser radar point cloud data through an unmanned aerial vehicle; then, a dynamic sparse gating multi-modal feature fusion network is constructed, key features of different data sources can be adaptively focused for effective fusion, and accurate larch individual tree instance segmentation is achieved; and finally, automatically extracting phenotype parameters such as tree height, crown breadth, canopy area and diameter at breast height based on a segmentation result. According to the method, multi-source data fusion, individual tree segmentation and phenotype extraction are integrally completed through an end-to-end deep learning model, the problem of accurate segmentation of larch individual trees in a complex scene is solved, and the efficiency and precision of forestry investigation are remarkably improved.

The invention relates to the technical field of forest tree genetic breeding, and discloses a larch fast-growing breeding method and system based on gene marker-assisted selection, and the method comprises the following steps: constructing a larch phenotype-genotype data set and carrying out genetic association analysis to obtain fast-growing related gene markers, detecting seedling genotypes and calculating fast-growing potential indexes, and calculating an adaptability index by combining the pedigree information and the adaptability related genotype, judging a fast-growing grade according to the fast-growing potential index and the adaptability index, and generating a breeding selection list of fast-growing optimization, regional trial planting and elimination types. According to the method, gene marker detection, additive effect calculation and regional adaptability analysis are integrated into a unified quantitative evaluation system, so that efficient screening and accurate classification of the larch fast-growing seedlings are realized, the breeding efficiency is remarkably improved, and the breeding period is shortened.

The invention discloses a method for enhancing pine wood nematode disease resistance of larch through jasmonic acid signal mediated flavonoid biosynthesis. The method comprises the following steps that 1, the larch is inoculated with pine wood nematode; 2, performing high-throughput omics sequencing sampling and data analysis; 3, treating larch seedlings with methyl jasmonate; 4, the inhibition effect of the kaempferol and the citrus aurantium on the pine wood nematodes is obtained. According to the method, larch is taken as a research object, a disease stress system is constructed by artificially inoculating pine wood nematodes, leaf / stem tissues at different time points after infection are selected, and sequential multiomics analysis is carried out by combining transcriptome sequencing and a wide targeting metabolome technology; the theoretical basis and method for improving the pine wood nematode disease resistance of larch by regulating and controlling the biosynthesis of kaempferol and citrus aurantium through a jasmonic acid signal way are defined.

The invention provides a larch man-made forest status index distribution estimation method based on an aviation laser radar digital canopy height model, and the method can quickly extract forest stand dominant height and forest age information of a 20-meter grid scale through directly utilizing the canopy height model generated by aviation LiDAR and the existing forest facies diagram data. By combining layered random sampling and guiding curve fitting, automatic generation of the forest farm-level high-spatial-resolution status index distribution map is realized, field labor and time costs are greatly saved, destructive sampling is avoided, spatial resolution and estimation precision are improved, requirements on point cloud density and an algorithm are reduced, data processing is simpler and more convenient, and the method is suitable for popularization and application. And the method is more suitable for large-range business operation. The status index distribution diagram can accurately reflect the subtle difference of the quality of the site in the forest, provides direct and reliable technical support for the selection of afforestation land parcels, the grading of the quality of the site and the formulation of management measures in the directional cultivation of large-diameter materials of larch, and has good application prospects and popularization values.

The invention discloses a method, a device, equipment, a medium and a product for rapidly measuring chemical properties of larch wood, and relates to the field of forestry science and spectral analysis, the method comprises the following steps: collecting a near infrared spectrum of a larch sample in a preset wavelength range, and sequentially selecting an effective modeling spectrum region and pre-treating; determining the lignin content, the alpha-cellulose content and the holocellulose content of the larch sample as reference values; constructing a training set and a prediction set; establishing a near infrared spectrum prediction model of lignin, alpha-cellulose and holocellulose; verifying the prediction precision of the near infrared spectrum prediction model of lignin, alpha-cellulose and holocellulose by using the prediction set; inputting a larch sample to be detected into the model which is verified to be effective, and outputting the predicted content of lignin, alpha-cellulose or holocellulose. The method realizes nondestructive, rapid and high-precision detection of main chemical components of larch wood, and is suitable for forest tree genetic breeding and wood quality evaluation.

The invention discloses a tundra mucor strain and application thereof in a microbial insecticide, and relates to the technical field of tundra mucor strain and insecticide application, the tundra mucor strain is separated from naturally infected larch ascochis Djak, is preserved in China General Microbiological Culture Collection Center (CGMCC) on August 11, 2025, and has the preservation number of CGMCC NO.9687. The invention also discloses a preparation method of the tundra mucor strain and application of the tundra mucor strain in a microbial insecticide, and the preparation method of the tundra mucor strain and application of the tundra mucor strain in the microbial insecticide. The preservation number is CGMCC (China General Microbiological Culture Collection Center According to the permafrost mucor strain and the application thereof in the microbial insecticide, the permafrost mucor strain MG is separated from the bodies of the larch Ya's larva inchworm which is naturally dead in the field, and the permafrost mucor strain MG is identified by using systematic morphology and molecular biology methods. Before, domestic and foreign literatures do not systematically report the pathogenicity and prevention and control potential of the permafrost mucor on the forest pests, and the research fills the blank of related research in the field of forestry pathogenic fungi.

The invention discloses application of coloured bean puffball to prevention and treatment of tip blight of larix olgensis, and belongs to the technical field of microorganisms. The invention provides a method for remarkably improving the disease resistance of trees by inoculating colored bean puffball mycelia to a root matrix of larix olgensis seedlings and culturing for at least 5 months to establish a symbiotic relationship. According to the optimization scheme, the bottleneck that the existing biological control effect is poor is broken through, and the control effect on the larch shoot blight can reach 60% or above and far exceeds the known level. According to the invention, the action mechanism is confirmed from physiological, biochemical and transcriptome levels for the first time: the pimpinella colorata can obviously enhance the activity of defensive enzymes such as catalase and phenylalanine ammonialyase in advance, and up-regulate the gene expression of key disease-resistant pathways such as flavonoid and phenylpropanoid biosynthesis. The invention provides a brand new solution for efficient and environment-friendly prevention and treatment of the larch shoot blight.