9 results about "North china" patented technology

The invention discloses a water-saving and emission-reducing grass-growing strip-shaped intercropping and interplanting method for a wheat and corn system in a groundwater limited mining area in North China Plain. The method comprises the following steps: firstly, performing strip-shaped simultaneous sowing on wheat and clover, only performing accurate water and fertilizer regulation and control on a wheat strip in a wheat growth period, and interplanting corn in the clover strip in a no-tillage manner when the wheat enters a dough stage; after the crops are harvested, the straw is smashed, covered and returned to the field, the clover naturally overwinter, and the next planting cycle is carried out; by means of the planting method, annual water consumption and carbon and nitrogen footprint can be effectively reduced, annual grain yield stability is maintained, meanwhile, soil enzyme activity and microbial environment are improved, cooperation of water saving, emission reduction, stable yield and soil improvement is achieved, and technical support is provided for agricultural sustainable development of underground water mining limit areas.

The invention discloses a concrete protective coating as well as a preparation method and a use method thereof, and the concrete protective coating comprises emulsion and powder. The preparation method comprises the following steps: S1, preparing the emulsion; S2, preparing the powder. The use method comprises four steps of S1 to S4. The concrete protective coating has the advantages that the concrete protective coating is excellent in impermeability, freeze thawing resistance, corrosion resistance, carbonization resistance, scouring resistance and abrasion resistance, the impermeability ensures that water cannot permeate into concrete to be damaged by freeze thawing denudation, the freeze thawing resistance can enlarge the application range of the concrete protective coating, and the concrete protective coating is especially suitable for cold regions such as North China, Northeast and northwest. The coating has a particularly remarkable protection effect on concrete; due to corrosion resistance, the concrete cannot be carbonized, and the use performance of the concrete cannot be influenced; due to the anti-scouring capability, the concrete is prevented from being abraded in an absolutely severe flood environment such as a high-flow-speed and large-flow flood environment.

This invention discloses a primer combination for water-saving and quality screening of winter wheat and its application, relating to the field of molecular biology. The primer combination includes primer pair P1 and primer pair P2. This primer combination is used for molecular marker screening of water-saving and drought-resistant traits in winter wheat and can be combined with SDS-PAGE electrophoresis to detect grain protein subunit composition for screening quality traits in winter wheat. This invention designs specific primer combinations, constructs a molecular marker screening system, and innovatively combines it with the "pre-irrigation followed by drought" cultivation management model, forming a highly efficient breeding method suitable for winter wheat. This method avoids dependence on a single known gene, instead achieving targeted improvement of water-saving, drought-resistant, and quality through synergistic screening of primer combinations and environmental adaptability breeding, providing a new technical path for wheat breeding in the arid North China region.

The invention relates to the technical field of rice high-yield cultivation, and discloses a northern rice high-yield population construction and cultivation method based on light and temperature close planting regulation, comprising the following steps: S1, light, temperature and regional environment monitoring: collecting illumination and temperature data and soil and irrigation and drainage conditions of a northern rice planting region, and establishing a regional light and temperature change model; s2, variety matching and sowing period determination: combining the light and temperature sensitive characteristics of the rice variety with the monitoring data in the step S1. According to the method, on the basis of real-time light and temperature monitoring and a over-the-year big data model, the key growth period and the high light and temperature period of rice are accurately aligned, the advantages of sufficient illumination and large day and night temperature difference of northern rice areas are utilized to the maximum extent, and water, fertilizer and field management are adjusted by dynamically adapting to light and temperature changes; and for example, nutrient supply is optimized when illumination is insufficient, and cooling measures are taken at high temperature, so that the accumulation and transfer efficiency of photosynthetic products is remarkably improved, the problem of insufficient utilization of light and temperature resources in traditional cultivation is solved, and a material foundation is laid for high yield.

The present application relates to a kind of efficient regeneration method with the larch of north China as explant, the method comprises the following steps: sowing, disinfection, induction culture, elongation culture, rooting culture, seedling and transplanting.According to the technical scheme provided by the present application, the medium with specific formula is used, so that the larch of north China shows significant advantages in the process of propagation: high differentiation efficiency, large proliferation coefficient, good rooting rate.In addition, the method also has the characteristics of short plant growth cycle, strong adaptability after transplanting and the like.The seedling after cultivation presents the characteristics of robust and straight, good growth and uniformity.The technical scheme of the present application significantly reduces the seedling culture period, effectively reduces the production cost.By establishing the adventitious bud induction system with the larch of north China as starting material, and successfully obtaining regenerated plant, a new technical approach is provided for the rapid propagation of the larch of north China.Meanwhile, the present application also lays the foundation for the future establishment of efficient larch of north China transgenic system.

The application discloses a North China type coalfield collapse column exploration and evaluation method based on ground directional drilling technology, which comprises the following steps: determining the center position of the collapse column in the coal seam floor contour map within the three-dimensional seismic delineation as the opening position of the main hole for exploration; determining the number, direction and horizontal displacement of the directional branch holes for collapse column exploration; calculating the distance between the coal seam floor and the Ordovician limestone aquifer and the water head height of the Ordovician limestone aquifer; calculating the safety aquifer thickness M of the coal seam floor; calculating the final hole depth of the main hole for collapse column exploration and the final hole elevation of the branch hole; determining the deflecting radius and trajectory of the branch hole; performing the main hole construction, determining the top boundary position of the collapse column according to the core and performing the hydrogeological test; performing the branch hole construction, determining the upper interface and the side interface of the collapse column and performing the hydrogeological test; delineating the spatial form of the collapse column and analyzing and evaluating the water enrichment and water conductivity of the collapse column. The application provides a scientific basis for the water prevention and control design of the mining field and the mine, and ensures the safe and efficient production of the mine.

The invention discloses an adversity regulation and control method for high-protein soybeans (the grain protein content is greater than or equal to 42%) encountering high-temperature stress (the daily maximum temperature is greater than or equal to 35 DEG C and lasts for more than 3 days) in the flowering period. According to the method, through the synergistic effect of physical cooling and soil moisture conservation, chemical stress resistance and flower protection and precise element regulation and control, flower falling and pod falling caused by high temperature are reduced, the yield is guaranteed, and meanwhile the high protein characteristic (the grain protein content is larger than or equal to 42%) is maintained. The method is suitable for high-protein soybean main producing areas such as south northeast, Huanghuai of North China and Yangtze River basin and summer high-temperature high-incidence areas.

The invention discloses a grouting treatment method for a deep-buried thick bedrock water-rich collapse column in a North China type coal field. The grouting treatment method comprises the following steps: step (1), determining a long axis of the collapse column and measuring the length of the long axis; (2) calculating the critical depth needing to be transformed below the collapse column coal seam floor; (3) determining the actual transformation depth of the collapse column and the length of the long axis of the collapse column on a transformation depth plane; (4) the number of grouting main holes is determined; (5) grouting slurry and grouting parameters are determined; (6) the number of directional grouting branch holes of each grouting main hole is determined; (7) the distance between every two adjacent directional grouting branch holes in the grouting main hole and the hole opening positions of the directional grouting branch holes are determined; (8) the track of each directional grouting branch hole is designed; (9) drilling and grouting are conducted; and (10) the grouting treatment effect is checked and evaluated. The technical problems that an existing collapse column treatment process conflicts with roadway tunneling and working face stoping of a coal mine and the like can be solved.

The application discloses a self-purification fresh air cooling system suitable for a data center machine room in a cold region and an intelligent control method thereof, and relates to the technical field of air conditioning. The system comprises a machine room, and data center cabinets, a machine room air conditioner and a machine room self-purification fresh air cooling unit are arranged in the machine room respectively. An outer side air outlet of the machine room self-purification fresh air cooling unit is communicated with a self-vertical louver air outlet through a pipeline and an electric sealing air valve, an outer side fresh air outlet is communicated with the louver air outlet through a pipeline and an electric sealing air valve, and an inner side fresh air outlet is communicated with an upper portion of the machine room air conditioner through a pipeline. A lower portion of the machine room air conditioner is communicated with a lower portion of the data center cabinet through a fan, a lower air outlet and a cabinet air inlet, and an upper portion of the data center cabinet is communicated with a return air pipeline through a cabinet air outlet and a return air outlet. The application can be widely used in air conditioning rooms with large indoor equipment heat dissipation and indoor temperature control requirements, such as data center machine rooms, and has a wide application prospect in cold regions of China, especially in the northeast, north China and northwest China.