59 results about "Species selection" patented technology

The invention discloses a high-yield rice planting method capable of efficiently reducing cadmium content in rice. The method comprises the steps of low-cadmium accumulation species selection, soil remediation and multiple agronomic measures. By means of the method, the cadmium content of planted rice on a piece of cadmium-polluting rice land can be significantly reduced, the method has the advantages of being simple, efficient and free from secondary pollution; rice yield is improved, rice quality is improved while the yield is improved, planting economic benefits are improved, and the methodis suitable to low cadmium rice production in a cadmium-polluting rice planting region and has broad application prospects.

The invention relates to the field of biological control of agricultural pests and aims at providing an artificial propagation and production method for diadromus collaris. The method comprises the following steps: collecting and propagating bee species, producing hosts, inoculating and propagating plutella xylostella, developing plutella xylostella pupae, inoculating the diadromus collaris, culturing and collecting the diadromus collaris, and reserving the diadromus collaris species. According to the method, the superior bee species selection, bee propagation and beekeeping technology is perfected and the diadromus collaris is subjected to high-quality efficient large-batch propagation; in addition, the large-scale continuous production can be performed, the method is applied in the field of agricultural pest control and used for preventing the plutella xylostella, the agricultural production needs are met to a great extent, and very convenience is provided for biological control of cruciferous vegetable pests.

The invention discloses a method of breeding the commercial meat rat of the bamboo rat kind. The method comprises the steps that 1, in the step of group domesticating young rats, the young rats are kept in a group breeding pool for 3-4 months; 2, in the step of rat and meat rat species selection and separate breeding, male rats and female rats with strong and high reproductive potential are selected and paired, each pair of mice are kept separately and fed in a breeding pond, the remaining bamboo rats are kept and fed as meat rat; the feeding uses both crude fiber material and concentrated feed, when the meat rats are fed to reach the selling weight, the meat can be sold. According to the method, the group breeding pool is utilized for young rats to adapt to the group life through domestication, the foundation is laid for the subsequent large-scale polyculture, and casualties caused by bamboo rat fighting in the process of subsequent polyculture are reduced and avoided. The bamboo meat rats having adapted to group living are raised in the natural environment in the wild, the survival rate is high, the body is stronger and the meat rats do not catch illness easily, and the quality of the bamboo meat rat is also greatly improved.

The invention belongs to the breeding technical field, and specifically discloses a guinea pig breeding method comprising the following steps: 1, species selection: selecting excellent individuals with strong arms and legs, flat back and wide ass and well grown genitals from a batch of guinea pigs of 3-month-old, and using same to serve as male and female guinea pig species; 2, breeding: using culture forage to feed the guinea pigs at the following quantity and frequency: 140-180g / time / pig, and 2times / day; 3, hybridization: allowing pubescent male and female guinea pigs to hybridize, breeding newly produced guinea pig babies to 4-month-old, and determining species. The guinea pig breeding method strictly selects species, uses special formula culture forage to feed the guinea pigs, thus improving guinea pig species breeding capability, guinea pig baby survival rate and growth speed.

The flow rate controller controlling a flow rate of gas supplied through a gas passage includes: a main gas pipe; a flow rate detecting unit detecting the flow rate of gas supplied through the main gas pipe and outputting a flow rate signal; a flow rate control valve mechanism controlling a flow rate; a conversion data storage unit storing a plurality of pieces of conversion data corresponding to a plurality of gaseous species, to indicate a relationship between a flow rate instruction signal input from outside and a target flow rate; and a flow rate control main body which selects the corresponding conversion data from the conversion data based on a gaseous species selection signal input from outside, calculates the target flow rate based on the flow rate instruction signal, and controls the flow rate control valve mechanism based on the target flow rate and the flow rate signal.

The invention discloses a breeding method for meat ducks, which is characterized in that it comprises variety selection, site selection, feed selection and feeding, and duck disease prevention and control. The invention improves the utilization rate of the feed, the cost of raw materials used in the feed is low, the feed-to-meat ratio is reduced, the growth is promoted, the incidence of ducks is low, the output of duck meat is high, the production cycle of ducks is short, and the daily weight gain of ducklings reaches 43-55g / day. The weight of the 15-day-old meat duck reaches 640-800g / piece, the weight of the 30-day-old duck is 1.7-2.2kg, the feed consumption is low, the feed-to-meat ratio is 2.3-2.6:1, and the weight of the 50-day-old duck is 3-3.2kg.