479results about How to "Improve reproductive ability" patented technology

The invention relates to a preparation method for a high-activity humic acid biofertilizer. The high-activity humic acid biofertilizer comprises 97-99% of humic acid bio-organic fertilizer, 0.2-3% of special functional bacteria, and 0.1-0.3% of activator. The high-activity humic acid biofertilizer has high quality of organic matter nutrient, is excellent in soil conditioning function, has stable effect and long fertilizer efficiency, has balanced and complete nutrient, comprises multiple inorganic components needed by crops, has high fertilizer efficiency and can promote the growth of the crop and improve the yield and quality, has good disease resistance effect, improves the root system environment of the crop, improves the nutrient absorption of the crop, develops the root system of the crop, and enhances the stress resistance of the crop. After the high-activity humic acid biofertilizer is used by a peasant, a good planting effect can be obtained, and the yield and income are increased, so that the high-activity humic acid biofertilizer is used for producing environment-friendly and organic food.

The speaker has a diaphragm main body 30 supported resiliently on a frame 23 via an edge portion 31 around its outer circumference, and the groove ribs 35 integrally formed in the edge portion 31, wherein a regulation member 37 for partially improving a flexural strength of the edge portion 31 is provided on a part of the front or back face of the edge portion 31.

The invention provides a preparation method of a microalga-based biochar material for heavy metal ion adsorption. The preparation method comprises the following steps that 1, microalgae and water are added into a hydrothermal reaction kettle to prepare microalga suspension liquid; 2, organic acid is added into the microalga suspension liquid, and after the hydrothermal reaction kettle is sealed, protective gas is introduced into the hydrothermal reaction kettle to replace air in the hydrothermal reaction kettle; 3, the hydrothermal reaction kettle in the step 2 is placed in a drying oven for a carbonation reaction, and the microalga-based biochar material is obtained; 4, activating treatment is performed on the microalga-based biochar material, and the activated microalga-based biochar material is obtained. According to the preparation method, biochar is prepared through hydrothermal carbonization by taking the nitrogen-containing microalgae as the raw material, and then activated modification is performed on the biochar through a KOH activating method and a NH3 activating method separately by taking the biochar as a precursor; the activated microalga-based biochar material obtained through activated modification has micro-mesoporous structures, the large specific surface area and the large pore volume, and the adsorption capacity of porous charcoal is greatly improved.

The invention provides a method for cultivating a novel Dingyuan pig breed, which relates to a method for cultivating a novel pig breed. The invention provides the method for cultivating the novel Dingyuan pig breed which has the advantages high fecundity, good meat quality and strong stress resistance of Dingyuan pigs as well as the characteristics of fast growth, high lean meat percentage and the like of imported pigs. The method comprises the following steps: a Dingyuan sow is hybridized with a novel USA strain Duroc boar to cultivate a first generation sow core group; second grading hybridization is performed to the first generation sow core group and a Dingyuan boar or the novel USA strain Duroc boar; from the third generation, group closure propagation and breeding are adopted respectively, and crossing of two to three generations is performed; and selection and remaining are performed through methods of comprehensive selection indexes and molecule marking assistance selection to form the novel Dingyuan pig breed, namely a novel breed of Wan Huai pigs and a novel breed of Dingyuan-Duroc pigs.

The present invention is directed to the construction of prototrophic, cellulo lytic strains of Saccharomyces cerevisiae with tethered and secreted cellulases and selection-based improvement of growth on cellulose by these strains. In some embodiments, host cells of the invention are able to produce ethanol using crystalline cellulose as a sole carbon source.

The invention discloses a breeding method for a Puan black goat line. The breeding method utilizes foundation Guizhou black nanny goats and Nubia billy goats to bi-cross, first-class first Nubia billy goat-black nanny goat hybrid generation nanny goats chosen as the female parent and first-class Guizhou black billy goats chosen as the male parent backcross, first-class backcrossed filial generation billy goats and first-class nanny goats are chosen to cross to be fixed, and therefore the Puan black goat line with more stable genes is bred. By introducing the excellent genes of the Nubia goats, such as big build, high reproduction rate and fast growth, the breeding method ensures that the bred Puan black goat line has the advantages of big build, fast early growth and development, high reproduction rate, high meat productivity and the like besides the characteristics, such as high adaptability, high disease resistance and black clothing hair, of the Guizhou black goats.

The invention relates to a high-activity humic acid composite microorganism fertilizer and a preparation method thereof. The high-activity humic acid composite microorganism fertilizer comprises the following components: 20-50% of activated humic acid, 0-20% of an organic material, 0.2-3% of a special-effect composite functional bacterial agent, 0.2-1.8% of a synergist, 30-60% of inorganic nitrogen phosphorus and potassium, 0.2-3% of trace elements and 0.1-0.5% of additives. The high-activity humic acid composite microorganism fertilizer integrates organic and inorganic nutrition and microorganism compounding and pelleting techniques, and the high-activity humic acid composite microorganism fertilizer has the characteristics of low water content, high hardness, availability in mechanical sowing and the like. The high-activity humic acid composite microorganism fertilizer prepared by the preparation method can be used for improving the soil fertility, improving the soil granular structure, fixing nitrogen in the air, decomposing phosphorus and potassium fixed in the soil, activating the micro-ecological environment of plant root soil, promoting growth and development of crops, enhancing the root system, increasing the utilization rate, reducing the use amount, reducing the soil-borne diseases, improving the anti-disease and stress resistance and increasing both production and yield.

The invention relates to a rehabilitation technology of polycyclic aromatic hydrocarbon pollutants (PAHs), particularly discloses a mixed inoculant for degrading PAHs. The mixed inoculant comprises indigenous mixed bacteria, wherein the indigenous mixed bacteria comprise Pseudomonas sp. B08, Pseudomonas sp. BM, Bacillus sp. BYB, Bacillus sp. B07, Ochrobactrum sp. ZHL4, Gordonia sp. BGDS and Mycobacterium sp. BFZG. The mixed inoculant disclosed herein can be added according to an inoculation quantity of 5-10%, and when the initial concentration of PAHs is 180.67mgL<-1>, the total degradation rate of PAHs after being processed for 9 days can reach 91.21%.

Disclosed is a method for extracting dihydro quercetin from larch. The invention is an improved production method. Due to different production materials and extraction processes, the dihydro quercetin products in U.S. and European markets are very expensive, at a price of 200-1000 euros per gram. Such a high market price economically limits the wide range of practicability of dihydro quercetin products. During the pretreatment of raw materials, 50 kilograms of larch wood chips and 500-800 liters of 50% ethanol solution are added into a reactor to get fully stirred and mixed; then the mixture is extracted and filtered for the second extraction; the filtrates are combined and adsorbed; the organic solvents are collected and dried by a vacuum evaporator through organic phase vacuum distillation; according to a weight proportion of 10:1, the residues are dissolved with hot water, decolorized with activated carbon and then crystallized at a temperature of 3-5 DEG C to precipitate the dihydro quercetin product which is then crushed after vacuum drying to finished product. The invention is used to extract dihydro quercetin from larch.

The invention discloses feverfew artemisia stolonifera, and in particular relates to an application of the Artemisia stolonifera in repairing of heavy metal cadmium polluted soil, namely planting the artemisia stolonifera in the heavy metal cadmium polluted soil. The enrichment of the artemisia stolonifera to the heavy metal cadmium is utilized, the artemisia stolonifera is planted into the polluted soil, the heavy metal cadmium can be absorbed and accumulated, and most cadmium can be transferred to the overground part; and the overground part is subjected to ashing treatment to extract the heavy metal, thus the aim of repairing the heavy metal cadmium polluted soil is achieved. The artemisia stolonifera has strong fertility, can grow rapidly and can grow on extremely poor soil, and management is extensive in the growing process of the artemisia stolonifera, thus the cost is low, the operability is high, and a new plant resource specie used for repairing the heavy metal cadmium polluted soil is developed.

The invention particularly relates a ternary-hybridization pig breeding method, belonging to the technical field of vertebrate breeding. Due to the ternary-hybridization breeding method, the ternary-hybridization pig resists coldness, has strong disease resistance and strong fecundity and is high in lean factor and quick in growth speed. The ternary-hybridization pig breeding method comprises the following steps that: (1) by taking a black pig in Heilongjiang province as a female parent, and taking a wild boar in Great Khingan mountain range as a male parent, primary artificial hybridization is conducted to generate the second generation of sow; and (2) the second generation of sow and an American Duroc boar are subjected the secondary artificial hybridization to generate the third-generation pig.

The invention provides a loach protein antihypertensive peptide and a preparation method thereof, belonging to the technical field of biology. The antihypertensive short peptide separated and purified from an enzymolysis product of loach protein has high activity in inhibiting angiotensin converting enzyme (ACE). The preparation method provided by the invention comprises the following steps of: carrying out enzymolysis on the loach protein to prepare an enzymolysis liquid; separating and purifying the antihypertensive peptide from the enzymolysis liquid; and sequencing the antihypertensive peptide. The invention combines a modern enzyme engineering technique and a peptide purifying and identifying technique, deep development and utilization on the loach protein are utilized, and a novel-sequence short peptide Leu-Glue-Tyr with high ACE inhibiting activity is found; and the novel loach protein antihypertensive peptide provided by the invention has high ACE inhibiting activity and has an IC50 value of 0.103 mg/mL.

The invention provides a microorganism bactericide capable of reinforcing plants to restore fields polluted by arsenic and preparation and application methods thereof, belonging to the technical field of environment restoration engineering. The strain utilized by the bactericide is Agrobacteriumsp. C13. The bactericide adopts a composite carrier which comprises turfy soil, saw dust, rice hulls and active carbon with the mass percentage being 30:25-30:25-30:15; the microorganism fermentation liquor is mixed with the composite carrier according to the mass ratio of 0.5-1:1; and the adsorption amount of the microorganisms of the composite carrier reaches 109-1012 per gram. The prepared bactericide is applied to the arsenic-polluted fields restored by ciliate desert-grass according to the use amount of 5g/kg, the biomass liveweight of the overground part of the restored plants is improved by 16-17%, and the removal rate of arsenic in the fields is improved by 40-41% in comparison. The carrier of the bactericide in the invention has rich raw materials, simple preparation method and easy realization of large-scale production.

The invention discloses artificial feed for Spodoptera frugiperda larvae and a preparation method and application thereof. The artificial feed for Spodoptera frugiperda larvae is made from, by weight,200-300 parts of corn meal, 80-120 parts of soybean meal, 10-30 parts of yeast powder, 10-20 parts of milk powder, 5-15 parts of vitamin complex, 6-9 parts of ascorbic acid, 2-6 parts of methyl 4-hydroxybenzoate, 2-5 parts of sorbic acid, 10-30 parts of agar powder, and 1500-2000 parts of sterile water. The invention also provides a method of feeding with the artificial feed. The artificial feedfor Spodoptera frugiperda larvae and the preparation method and application thereof have the advantages that materials are easy to attain, the cost is low, preparation is convenient, storage time is long, nutrition is complete, feeding effect is good, the artificial feed is very practical, and large-scale feeding of Spodoptera frugiperda larvae is benefited.

The invention relates to the field of pollination and seed production of rapes, in particular to a method for pollinating and producing seeds of the rapes by osmia. The osmia is Japanese osmiacornifrons; and the method comprises the following steps: 1-2 days before the flowering of the rapes, moving beehives with bee releasing openings on one side into a rape seed producing field or a seed producing shed, wherein the distance between the adjacent beehives is 20-30 m and the distances between the lower end surfaces of the beehives and the ground are 1.2 m; and when the flowering period of the rapes is finished, finishing the pollinating task of the osmia, finishing bee rearing and collecting the bees into the beehives. Compared with the traditional bee pollination and seed-production, the method for pollinating and producing the seeds of the rapes by the osmia, provided by the invention, has the advantages as follows: (1) the seed producing efficiency is high and seed purity is good; (2) time and labor are saved once for all; (3) times are consistent and the operation is easy; and (4) the method is used for both scientific research and production, not only is suitable for requirements of large-area seed production fields but also can preferably satisfy small-area seed production sheds, in particular hybrid seed productions in the small-area seed production sheds; and difficulty problems of crossing, more labors, low seed setting rate and the like are effectively solved.

A method for culturing the hybrid scallop with high growth speed and stress resistance includes such steps as distant hybridization between Jiekong scallop and Huagui Jiekong scallop, hybridizing with Jiekong scallop JNR to obtain the male parent ZHJ, hybridizing with the female Jiekong scallop CDS5, and culturing the hybrid filial generation.