84 results about "Agricultural science" patented technology

A seed planting unit of an agricultural implement may include a wheel support arm having an upper portion and a lower portion. A wheel may be rotatably supported by the lower portion of the wheel support arm, the wheel configured to contact the soil surface to define a penetration depth setting for a ground engaging tool relative to the soil surface. A depth stop member may be provided in operative association with one of the support structure or the wheel support arm. A depth adjustment member may be selectively movable relative to the other of the support structure or the wheel support arm to vary a relative position between the depth adjustment member and the depth stop member. The depth stop member may selectively abut one of the plurality of steps when the wheel is contacting the soil surface to set the penetration depth setting for the ground engaging tool.

The invention relates to the technical field of equipment for plant protection, in particular to a pesticide sprayer with a self-propelled spraying frame and of which the height is adjustable to adaptto various crops with high or short stalks. The pesticide sprayer comprises a rack, a walking transmission device and a spraying device; a driving chamber is arranged at the upper end of the front part of the rack, and a left stand shaft frame and a right stand shaft frame are fixed to the left and right sides of the front part of the rack, and a left front walking wheel and a right front walkingwheel are installed at the left and right sides of the front part of the rack respectively; left and right pesticide boxes are arranged at the left and right sides of the lower end of the rack respectively, and thus the stability of the equipment is ensured; the chassis height of the equipment is increased through the left stand shaft frame, the right stand shaft frame, a left rear wheel frame and a right rear wheel frame, and thus the equipment can adapt to spraying of the high-stalk crops, while the crops will not be damaged; pesticide spraying operation in a wide work range can be achievedby spreading a folding arm frame, the equipment can be convenient to transport and park by folding the folding arm frame, the occupation area is reduced, and the pesticide sprayer with the self-propelled spraying frame and of which the height is adjustable to adapt to the various crops with the high or short stalks has the advantages of being high in pesticide spraying speed and efficiency, simple in structure and low in cost.

The invention relates to a callery pear ascorbate peroxidase gene and a use thereof in resisting heavy metal stress. The gene has a nucleotide sequence shown in the sequence SEQ ID No. 1. The total RNAs of the leaves of the callery pear are extracted after cadmium treatment and the ascorbate peroxidase gene Pc. APX is cloned by combination of bioinformatics and PCR so that the complete coding genesequence of 753 bp is obtained. The escherichia coli expression vector pET-22b(+)-Pc. APX is constructed and through the escherichia coli heterologous expression system, the functions of the cloned ascorbate peroxidase gene Pc. APX are identified and the recombinant escherichia coli with the cloned ascorbate peroxidase genes Pc. APX have strong tolerance to cadmium. At the same time, a binary plant expression vector pRI201-AN-GUS-Pc. APX is contructed, the vector is transferred into agrobacterium tumefaciens GV3101 cells by a freezing-thawing method, and the cells are transformed into Arabidopsis thaliana, and the obtained transgenic Arabidopsis thaliana has higher cadmium tolerance than wild-type Arabidopsis thaliana.

The invention belongs to the technical field of agriculture and particularly relates to a tomato seedling grafting method for obviously increasing the yield at the early period and a matched cultivation measure. A tomato seedling after grafting has two fruiting scions, and seedling raising and cultivation, light supplement and healing and water and fertilizer management are conducted. According tothe method, the tomato yield (first two scion fruits) at the early period is obviously higher than the yield of a traditional grafting method, and compared with a traditional management method, the flowering phase is advanced by 4-15 days.

The invention discloses an irrigation device for tea planting. The irrigation device comprises a liquid storage tank, connecting boxes, a liquid collecting piece, a liquid extraction pump, a first rotating part and a stirring part; an annular box is arranged on the peripheral surface of the liquid storage box, and a filter screen is arranged on the liquid storage box and covers a first opening; the connecting boxes are located on the two sides of a protection box, electric extendable rods are arranged on the connecting boxes, and the electric extendable rods are connected with the protection box through height adjusting devices; a connecting piece and a liquid spraying head are arranged on the liquid collecting piece, and the connecting piece is connected with the connecting boxes through an inclination angle adjusting device; a liquid extraction pipe and a conveying pipe are arranged on the liquid extraction pump; a hose is arranged at the bottom of the liquid collecting piece, the other end of the conveying pipe is connected with the hose, and the other end of the liquid extraction pipe communicates with the annular box; and the first rotating part is arranged in the liquid storage tank, and the stirring part is arranged on the first rotating part. According to the irrigation device, the height, the inclination angle and the transverse position of the liquid spraying head can be conveniently adjusted so as to facilitate irrigation operation, a nutrient solution and water can be evenly mixed so as to improve the irrigation and fertilization effect, the liquid spraying head can be prevented from being blocked, operation is easy, functions are diversified, and the using effect is extremely good.

The invention belongs to the technical field of sweet potato processing, and especially relates to a sweet potato skin cleaning device. The invention aims to solve the problem that surface walls of sweet potatoes are easily damaged by mechanical cleaning. The sweet potato skin cleaning device comprises a cleaning box, wherein a water inlet pipe and a blow-off pipe are fixed to the bottom ends of the two sides of the cleaning box correspondingly; a water return pipe is fixed to the top of the side, away from the water inlet pipe, of the cleaning box; fixed frames are fixed to the two ends of the top of the cleaning box correspondingly; and a feeding conveying belt and a discharging conveying belt are rotationally connected to two sides located between the two fixed frames correspondingly. According to the sweet potato skin cleaning device in the invention, silica gel blocks are used for increasing friction force to guarantee conveying-out of sweet potatoes, so continuous movement and cleaning of the sweet potatoes are realized; the sweet potatoes are prevented from colliding with a stirring mechanism through friction of the silica gel blocks and are thus prevented from surface walldamage, and the sweet potatoes slowly move along an inclined cleaning conveying belt and the feeding conveying belt so as to avoid collision with the inner wall of the cleaning box, so the completeness of the surface walls of the sweet potatoes is further improved after the sweet potatoes are mechanically inclined.