209 results about "Fecundity" patented technology

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 invention provides an industrial loach breeding and fry culturing method and belongs to the field of aquaculture. The method includes industrial breeding and fry culturing workshop construction and a specific breeding and fry culturing method. The specific breeding and fry culturing method includes: arranging bi-layer open net cages in a cement pool in a breeding workshop, wherein inner net cages are rutting and spawning places for parents, and outer net cages receive eggs concentratedly; and arranging a plurality of open foam boxes in a hatching and fry culturing workshop, placing the eggs into the foam boxes after counting, feeding loach fries by micro initial feed after hatching to fries to enable the loach fries to live through an initial critical period to become strong fries, and selling the fries or placing the fries into a pond for large-scale fingerling rearing. A workshop production process is adopted, breeding and hatching and fry culturing environments are guaranteed effectively, operation is facilitated, working efficiency is high, fecundity can be measured accurately, fertilization rate reaches above 98%, hatching rate basically reaches 100%, fry survival rate basically reaches 100%, and survival rate of large-scale fingerling rearing by placing the strong fries into the pond reaches above 50%.

The invention relates to an artificial feeding method of tested insect, especially relates to an artificial feeding method of tested chive maggot, wherein the Chinese chive feedstuff is replaced by the artificial synthetic feedstuff, thus the survival rate, pupation rate, emergence rate, single-female fecundity are greatly increased compared with the prior tested chive maggot breeding method, therefore the good condition is provided for regular supply of tested chive maggot.

The invention belongs to the aquaculture technology field, in particular relating to an artificial control method for the improvement of female finless eel parent fecundity. The finless eel has special physiological phenomena and sex reversal characteristics with small size, large egg granules and low fecundity. Thus the scale finless eel propagation is subject to the restrictions of the female finless eel parent self-conditions. In the invention, through the artificial simulation of female finless eel culture and development environment, the rational selection of parental finless eels, the reasonable stocking density arrangement, the appropriate feeding and management methods, the pre-oviposition period intensive culture and the artificial control measures, the female finless eel fecundity in natural state can be enhanced to the fecundity up to 450 to 1300 grains each and the 680 grains average level from 170 to 650 grains each and the average 260 grains. Therefore, the average fecundity of finless eel is improved by 161%.

The invention discloses a method for cultivating a high-quality specialized strain through Tibetan pigs. Duroc and the Tibetan sows are utilized for hybridization to breed a grading first-filial generation, Duroc boars in a core group and breeding core group sows of the grading first-filial generation are used for hybridization to serve as a grading second-filial generation, the Duro boars in thecore group and the breeding core group sows of the grading second-filial generation are used for hybridization to serve as a grading third-filial generation, the Duro boars in the core group and the breeding core group sows of the grading third-filial generation are used for hybridization to serve as a grading fourth-filial generation, grading fourth-filial generation boars and sows are subjectedto athwart crossing to serve as a zero generation, and athwart crossing is fixed; then generation breeding is carried out, and the high-quality specialized strain is obtained through breeding. The bred specialized strain has the straight back and belly, strong four limbs and the solid limbs and hoofs, achieves good body combination, and is developed in leg and buttock, good in fecundity, good in fattening performance, high in feed conversion rate, high in carcass performance, high in meat quality and free of PSE or DFD meat, the longissimus dorsi pH ranges from 6.0 to 6.5, and the rear leg proportion is larger than 35%.

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 discloses a method for promoting fish gonad maturity, which employs comprehensive adjustment of water temperature adjustment, light emitting adjustment and nutrition adjustment and technology preventing clit insect. The gonad of fish cultured from late February to early March and adjusted with said comprehensive adjustment matures more than one month earlier than that of in natural condition, and gonad of parent fish cultured in the middle October and adjusted with said comprehensive adjustment is about four months earlier than that of in natural condition, which advances fish breeding time. The fecundity is increase in Zhejiang province, the quality of ovum and sperm is improved, the fertility rate is 62.5%, rate of hatchability is 60.1%, and seeding survival rate is 15%.

The invention relates to a method for culturing a Stichopus japonicus seed, which belongs to the technical field of a Stichopus japonicus seed culturing method and comprises the following steps of (1) fishing and catching; (2) screening; (3) transporting and (4) culturing the Stichopus japonicus seed. According to the method for culturing the Stichopus japonicus seed disclosed by the invention, the culturing process is easy to operate, the Stichopus japonicus seed is scientifically selected and fished and caught in advance; the Stichopus japonicus seed can be matured in advance and lay eggs by utilizing the method of indoor heating and accelerating, thus, large-scale seeds can be cultured in the same year, and the produced Stichopus japonicus seed has enhanced hereditary capacity, strong resistance and good property; moreover, as the feed of the Stichopus japonicus seed and the water temperature and the water quality in the Stichopus japonicus culturing pond are strictly controlled, the fecundity of the Stichopus japonicus is better than that of the Stichopus japonicus cultured in the pond and the intertidal zone, thus, the laid eggs have good quality and the distortion ratio at each stage is high.

The invention discloses a breeding method of breeding pigs, which comprises the following steps of: primary selection: excluding pigs which have the genetic defects, do not comfort to the appearance features and are poor in growth and development at the condition of 30 kg; secondary selection: carrying out elimination treatment or other treatments on individuals which are poor in development and are not qualified under the condition of 60 kg; tertiary selection: calculating the selection index of each pig according to the backfat thickness, the growth speed and other data, carrying out site selection according to high and low indexes and in combination with the blood relationship and the body type appearance and selecting pigs with high indexes and good body type appearance into a core group; starting to mate after the weights and the month ages of gilts subjected to the tertiary selection reach the standard; and carrying out semen examination and limb and hoof compactness evaluation on boars selected by final detection before mating and eliminating the boars which are not qualified in the continuous tertiary semen examination. The breeding pigs bred by adopting the method disclosed by the invention have the advantages of high pig fecundity and quick weight-increasing speed and are very suitable for being raised and reproduced by various farming village farmers.

The invention involves a microbial feed additive and its prepare methods which improveboar fecundity, it is characterized by:lactic acid lactobacillus and bacillus subtilis which are optimized make the products rich in beneficial microbios and variety of active metabolite through the means of combining pedigree breed fermentation and composite fermentation. The advantages of the invention are maintaining boar body health,repairing tissue injury, improving the fecundity and the body immune function, thus making the boar maintain strong sexuality and produce high grade semen, extending boar life, and nontoxic, nonpersistent and the use is convenience.

The invention discloses a formula of an artificial feed for dichocrocis punctiferalis, and a manufacturing method of the artificial feed and belongs to the field of artificial feeds for insects. The feed comprises Chinese chestnut powder, maize meal, peach powder, soybean flour, beer yeast powder, multivita-glucose, cholesterol, casein, ascorbic acid, erythromycin, agar powder, methylparaben, methyl parahydroxybenzoats and water. The invention further provides a manufacturing method of the artificial feed for dichocrocis punctiferalis. According to the artificial feed, the Chinese chestnut powder, the maize meal, the soybean flour, the beer yeast powder and the like are added and are in coordination with a plurality of trace elements, so that on the premise of improving the survival rate, the fecundity and the like of dichocrocis punctiferalis, the raising cost is lowered effectively, and the problem that when the conventional artificial feed is used for feeding dichocrocis punctiferalis, larvae refuse feed, the survival rate is low, and the development is not uniform can be solved.

The invention discloses a nutrient substance for prolonging the service life of adult bees of aphidius gifuensis ashmead. The nutrient substance is composed of 25% of white sugar, 5% of cane sugar, 5% of glucose, a small number of mineral substances, vitamins, amino acid and copper gluconate and the balance water. The nutrient substance can be supplied to aphidius gifuensis ashmead in the field with aphidius gifuensis ashmead, can provide sufficient nutriment for the growth and development of adult bees of aphidius gifuensis ashmead, prolongs the service life of adult bees of aphidius gifuensis ashmead, improve the activity and oviposition capacity, is low in cost, and guarantees the large-scale propagation and application of aphidius gifuensis ashmead. The aphidius gifuensis ashmead is fed artificially and released in the field, the service life of myzus persicae is shortened and the fecundity of myzus persicae is decreased by more than 90% through oviposiiton and parasitism of female bees on myzus persicae, and the myzus persicae control function is remarkable. The service life of adult bees of aphidius gifuensis ashmead is prolonged, the survival rate of adult bees of aphidius gifuensis ashmead is improved, and large-scale application of aphidius gifuensis ashmead is facilitated.

The invention discloses a method of improved artificially synthesized Brassica napa L. for heterosis utilization, belonging to the technical field of breeding plant novel varieties. The method comprises the following steps: transferring the excellent oil economical characters (the content of thioglycoside in seed cake dregs is lower than 30 mu mol/g, and the content of erucic acid in seeds is lower than 1% of double-low Brassica napa L.) of the double-low Brassica napa L. to wild cabbage; culturing a novel oil wild cabbage material, hybridizing the material with a double-low Brassica campestris variety to obtain the artificially synthesized Brassica napa L. with normal fecundity, wherein, the content of thioglycoside in seed cake dregs is lower than 30 mu mol/g, the content of erucic acidin seeds is lower than 1%, and the superior combination prepared by the artificially synthesized Brassica napa L. and the natural Brassica napa L. is screened. In the invention, the good genes of Brassica napa L. are transferred to wild cabbage to culture oil wild cabbage material which is for overcoming the disadvantages of low quality and low fecundity of the existing artificially synthesized Brassica napa L., thereby improving the potential of artificially synthesized Brassica napa L. for heterosis utilization.

The invention concerns the use of certain compounds related to fatty acids to control nematodes that infest plants or the situs of plants. Nematodes parasitizing animals can also be controlled using the methods and composition of this invention. The useful compounds are inhibitors of nematode delta-12 fatty acid desaturases and can be, for example, from C16 to C20 in length. A feature of these compounds is that their inhibitory effect on the activity of a nematode delta-12 desaturase, or on the viability or fecundity of a nematode, is smaller in the presence of the product of a delta-12 fatty acid desaturase (e.g., linoleate) than in the presence of the substrate of the enzyme (e.g., oleate).

A turbot parent fish feed belongs to the field of aquatic animal nutrition and feed. A basal feed comprises the following materials by mass percentage: 70% of fish meal, 4% of casein, 15% of high-gluten flour, 2% of phospholipids, 1% of choline, 0.5% of vitamin mixture, 0.5% of mineral mixture, 1.5% of dicalcium phosphate and 5.5% of fish oil; then 4800 mg/kg of vitamin C is added to the basal feed; and the added vitamin C is vitamin C poly-phosphate with 30% of effective content. The vitamin C of polyphosphate is added in the turbot parent fish feed to make the effective content of the vitamin C reach 4800mg/kg, so that the turbot spawning rate can be improved, the fecundity can be improved, the egg quality is improved, and the survival rate and the growth rate of the postlarva can be improved.

The invention provides forage improving ovulation amount of back-up nonpregnant sows and a manufacturing method thereof. A recipe includes 42 kg of fermented bean dregs, 0.40-0.45 kg of soybean oil, 30-40 kg of corn, 15-18 kg of wheat bran, 8-10 kg of fermented soybean meal, 3-6 kg of premix, 2-4 kg of oil powder, 0.125 kg of baking soda, 0.040 kg of multivitamin, and 0.05 kg of lysine. The materials are sufficiently mixed by stirring to get the finished product. The back-up nonpregnant sows are raised by the forage. The primiparity sows ovulate 19.35 on average, and the multiparity sows ovulate 24.69 on average. Fecundity is significantly improved.

A modified arthropod, an arthropod-modifying bacterium, and use thereof as an agent for control of diseases transmitted by arthropods, particularly mosquitoes, is provided. More specifically, an isolated arthropod-adapted Wolbachia bacterium capable of modifying one or more biological properties of a mosquito host is provided. The modified arthropod may be characterized as having a shortened life-span, a reduced ability to transmit disease, a reduced susceptibility to a pathogen, a reduced fecundity, and/or a reduced ability to feed from a host, when compared to a corresponding wild-type arthropod.

The invention belongs to the technical field of corn breeding, and particularly relates to a breeding method for an inbred-line new strain of high-yield multi-resistance high combining ability corn. According to the breeding method, the inbred-line new strain of the high-yield multi-resistance high combining ability corn is bred through selfing of optimal plants of a corn strain PS group. The breeding method has the advantages that the PS group serving as a basic breeding material has high resistance, high appearance quality and high fecundity, and cyclic breeding and high-density selection stress strategies are adopted, so that the obtained SP221 integrates excellent traits such as high yield with multi-resistance and high combining ability, and can be applied to preparation of good cornhydrids and served as a basis material for corn variety improvement.

The invention relates to a method for large-quantity propylea japonica indoor raising. Wheat aphids, melanaphis sacchari and corn leaf aphids are used as aphids for feeding propylea japonica, and through specific technical measures such as host young aphid cultivating, aphid expanding propagation and propylea japonica artificial feeding, a large quantity of field-preventing and indoor-theory-study propylea japonica is obtained by expanding propagation. According to the method, wheat aphid feeding is carried out at a larval phase, and wheat aphid, melanaphis sacchari and corn leaf aphid feeding is carried out at an adult spawning period. The nutritional requirements of propylea japonica are improved, and the fecundity of propylea japonica is greatly improved. During raising, corn seedlings are placed, the habitat of propylea japonica is enlarged, space complexity is improved, propylea japonica autotomy and competition are lowered, and raising density can be greatly improved. The method is summarized according to the habit of propylea japonica and is easy to operate, economical and practical. Propylea japonica obtained by expanding propagation is high in survival rate and high in fecundity, and large-scale artificial breeding of propylea japonica can be achieved.

The invention relates to a water extraction method of ricinine, application of extract and a toxicity evaluation method of ricinine. Magnetic-force heating and mixing auxiliary ultrasonic extraction technology is adopted, water is used as extraction solvent, the method of extracting high-purity ricinine from castorseed shells and castor old leaves is utilized, ricinine is used for controlling grain storing pests such as sitophilus zeamais and tribolium castaneum, caenorhabditis elegans are used for toxicity evaluation of ricinine, and lethality, fecundity, body length and activity of enzyme inside body of caenorhabditis elegans are determined. The water extraction method of ricinine, application of extract and the toxicity evaluation method of ricinine are simple in operation and low in cost, reduce use of organic reagents, protect the environment, and provide necessary conditions for large-scale industrial production of ricinine biological pesticides due to the fact that extraction solution can be directly used for controlling grain storing pests.

The invention discloses an attractant synergist at the early stage of egg laying of monochamus alternatus hope and a preparation method thereof. The attractant synergist includes a pheromone mixture which has high-efficiency attraction activity for the monochamus alternatus hope and a synergist, wherein the pheromone mixture includes tepenes (C5H8)n, ethanol C2H6O, isopropyl alcohol, acetaldehyde C2H4O, acetone C3H4O3, benzoic acid C6H5COOH, eugenol C10H12O2, turpentine and turpentine oil and synergist S-ipsdienol, wherein n is equal to 2; and the substances are mixed in the ratio of 0.5:5:3:2:1:1:1:2:1:0.5. The attractant synergist has the advantages of high efficiency, safety, environmental friendliness, safety for human beings and animals, no drug resistance of pests and the like; and most importantly, average fecundity of adults trapped by the attractant is higher; and the attractant synergist has higher attraction activity for the monochamus alternatus hope at the early stage of egg laying and higher application value.