44results about How to "Avoid cold damage" patented technology

The invention relates to corn fertilization, in particular to a corn special fertilizer and the application. The weight composition of the fertilizer is calculated according to the effective contents of nitrogen, phosphorus and potassium of N: P: K: Zn equals to 1:0.25 to 0.35:0.37 to 0.47: 0.08 to 0.1; the contents of hydroquinone and dicyandiamide account for 2.0 to 3.0 percent of N fertilizer.

The invention discloses a winter sunlight greenhouse seedling transplantation method of potato seedling seeds. The seedling seeds collected in the same year are subjected to dormancy breaking, pregermination and the like, and cultured and transplanted in a winter. The method mainly comprises the following steps of (1) substrate preparation, (2), the dormancy breaking of the seeds, (3) the pregermination, (4) seeding, (5) seedbed management, (6) nutrition pot preparation, (7) transplantation, (8) management after the transplantation, and (9) timely harvesting. The method has the advantages that (1) the dormancy of the potato seedling seeds collected in the same year is broken effectively, so that a germination rate of the seedling seeds collected in the same year reaches above 80%; (2) the temperature and the humidity are controlled with small sheds in a sunlight greenhouse, so that chilling damages are prevented effectively; (3) enough water is sprayed before the transplantation, so that the damages to root systems of seedlings during the transplantation are reduced, and a survival rate of the transplantation of the seedlings reaches above 95%; and (4) the potato seedling seeds are collected and applied in the same year; a seed breeding period can be shortened by 1-1.5 years compared with the conventional method; and breeding, production and utilization of a new variety are accelerated.

The invention relates to a special fertilizer for corn, in particular to a special fertilizer for corn with water holding and soil improvement effects and preparation thereof. The special fertilizer comprises the following components in part by weight: 100 to 200 parts of organic substance, 200 to 300 parts of compound fertilizer, 0.2 to 3 parts of active covering agent, 150 to 200 parts of acrylamide, 50 to 100 parts of starch, 20 to 50 parts of attapulgite, 20 to 40 parts of porous inorganic substance, 30 to 60 parts of clay, 100 to 150 parts of acid liquid, 2 to 4 parts of initiator, 0.5 to 1 part of cross linker, and 0.03 to 0.1 part of compost leaven. The compound fertilizer mainly comprises the following components by weight based on effective content: 1 percent of nitrogen (N), 0.45 to 0.60 percent of phosphorus (P), 0.40 to 0.55 percent of potassium (K) and 0.10 to 0.25 percent of zinc (Zn); and hydroquinone and dicyandiamide are 2.0 to 3.0 percent of the consumption of N fertilizer. The special fertilizer for corn keeps certain advantage of a water holding agent; because proportional organic substance, porous inorganic substance, clay and the like are added, the special fertilizer plays a role in improving the structure, organic substances and pH value of the soil; because humic acid is added, the special fertilizer can play a role of urease inhibitor to certain degree; and by matching the urease inhibitor, the utilization efficiency of N in the compound fertilizer can be improved.

A water retention compound fertilizer specially used for maize in arid-semiarid regions is characterized by being formed by mixing water retention agent and slow release fertilizer according to the weight ratio of 2-4:8-20; based on the effective content, the composition by weight of the compound fertilizer is N:P:K:Zn=1:0.15-0.45:0.27-0.47:0.08-0.1; the weight content of hydroquinone and/or dicyandiamide is 2.0-3.0% of the weight content of N in the fertilizer; the water retention agent is a mixed type water retention agent and comprises the components of 100-200 parts of organic matter, 0.2-3 parts of active sealing face agent, 150-200 parts of acrylamide, 50-100 parts of starch, 20-50 parts of attapulgite, 20-40 parts of perlite, 2-4 parts of evocating agent and 0.5-1 part of cross linker according to the parts by weight. The water retention compound fertilizer has low cost and convenient application, and can effectively play the role of water retention, fertilizer conservation andlong-effect yield growth.

The invention relates to the technical field of greenhouse planting, and discloses a greenhouse air temperature adjusting system. The greenhouse air temperature adjusting system comprises a compressor, a four-way reversing valve, a fin type heat exchanger, an expansion valve, a double-pipe heat exchanger, a surface air cooler, a circulating pump and a liquid storage pond. The compressor is sequentially connected with the double-pipe heat exchanger, the expansion valve and the fin type heat exchanger through the four-way reversing valve to form a heat pump circulating unit, a centrifugal fan is arranged at one end of the fin type heat exchanger, the other end of the fin type heat exchanger is connected with the surface air cooler, one end of the double-pipe heat exchanger and one end of the surface air cooler are communicated with the circulating pump, the other end of the double-pipe heat exchanger and the other end of the surface air cooler are communicated with the liquid storage pond, and the circulating pump is communicated with the liquid storage pond. In the greenhouse air temperature adjusting system, the heat pump circulating unit is utilized for collecting heat, the surface air cooler and the heat pump circulating unit are used for heat radiation, heat collecting efficiency can be improved, heat collecting time can be prolonged, the utilization rate of surplus air heat energy in a solar greenhouse can be greatly improved, and running is stable and reliable.

The invention discloses a waterlogging-avoiding crop cultivation method for karst peak-cluster depression area. The method comprises: a. arrangement of a crop planting system, which is to plant pasture; and b. waterlogging-avoiding cultivation method for crop in the depression area: A. waterlogging-avoiding potato cultivation which comprises the steps of potato seed selection and germination, land preparation and fertilizer application, seeding, management and harvest, wherein potato blocks with dedicate, bright and smooth skin are selected as potato seeds and are stored in stacks before seeding, fertilizer application is carried out before land preparation, seeding is carried out after rain when soil contains enough water; B. waterlogging-avoiding corn cultivation which comprises the steps of introducing a new corn variety, planting corn seeds and covering a plastic film in the early growth period of the corn to advance the maturation period of the corn, and top dressing; and C. depression area pasture cultivation which comprises seedling and fertilizer application, field care and fertilizer application, intertillage and weeding, wherein intertillage is carried out together with fertilizer application to improve the resistance of the pasture and to accelerate the growth of the pasture after waterlogging. The method is easy to implement and operation, increases economic income and avoids damages to ecological environment.

The invention relates to a sand consolidation and plugging removing treatment fluid for sand control of fine silt oil reservoir oil wells, a sand control treatment fluid system and a sand control method using the same, and belongs to the technical field of petroleum exploitation. The sand consolidation and plugging removing treatment fluid comprises the following components by mass: 8-12% of a sand consolidation and plugging removing agent, 0.5-1.5% of a drainage aid, 0.5-1.5% of a corrosion inhibitor, 1-2% of an iron ion stabilizer, 1-2% of mutual solvent, ammonium chloride and the balance ofwater. The sand control treatment fluid system is composed of a pretreatment liquid, a preflush, a treatment liquid and a replacement liquid, and the volume ratio is 4-6:1-2:2-3:1-2 in turn. The invention also disclose a sand control method using that sand control treatment fluid system. The synergistic effect of each component of the sand control treatment fluid system forms a bonding coating onthe surface of fine siltstone and clay grains, and sand is cemented and consolidated. After the implementation of this measure, the sand control and production increase effect is remarkable.

The invention discloses a thermal production snubbing device, which comprises a christmas tree, a hot fluid pipe column, a top switching valve device and an anti-pollution back-pressure valve tool, wherein the anti-pollution back-pressure valve tool is arranged in a pit-shaft sleeve, the lower part of the anti-pollution back-pressure valve tool is provided with a perforated pipe column, and the top switching valve device is arranged on the pit-shaft sleeve; and the hot fluid pipe column is arranged on the lower part of the top switching valve device and can be inserted into the anti-pollutionback-pressure valve tool, and the christmas tree is arranged on the top of the top switching valve device. The thermal production snubbing device is free from blowout and well killing operations after a thick oil well is infused with hot fluid and is soaked, and avoids kill fluid from causing cold damages to layers infused with hot thick oil to play a role of protecting oil layers.

The invention discloses a litchi fresh-keeping method, and belongs to the technical field of storage and fresh-keeping of fruits and vegetables. The litchi fresh-keeping method comprises the following steps: soaking cleaned litchis in Sportak, then performing soaking in sodium nitroprusside, spraying a vegetable gum solution on the surfaces of the litchis, then carrying out heat treatment, and storing the litchis in a low-temperature closed environment. According to the fresh-keeping method, the low-temperature storage time of the litchis is prolonged to the maximum extent, loss of moisture of the litchis is reduced, generation of malonaldehyde and hydrogen peroxide in the litchis is reduced, the activity of superoxide dismutase in the litchis is improved, rotting and browning of the litchis are effectively prevented, the fresh-keeping effect is good, chemical substances such as sulfur are not contained, the preserved litchis are good in taste, green and environment-friendly, and the preservation process is simple and easy to popularize.

The invention discloses a steam injection and oil extraction integrated lifting device for an offshore heavy-oil thermal production well and an operation method of the steam injection and oil extraction integrated lifting device. According to the device, a ground high-pressure pump is used for conveying power to the underground through a high-pressure power pipeline, and a hydraulic driving cylinder and a steam injection and oil extraction integrated pump are driven to do reciprocating motion and complete up-down stroke motion. Downhole tools of the device are all made of all-metal materials and have the advantage of being resistant to high temperature. The method achieves steam injection, soaking, blowout and lifting production through an integrative string, integration of steam injectionand production is achieved, and cold damage of well washing and pressing to an oil layer is avoided. The device is suitable for lifting of an offshore highly-deviated well and a water well (the welldeviation angle is 0-90 degrees), the operation cost of offshore pump inspection operation by moving strings is reduced, thermal recovery and development benefits of heavy oil are improved, and the device has the technical advantages of safety, reliability and the like in the heavy oil thermal production well lifting aspect.

The invention discloses a planting method for preventing cold damage of rice. The planting method for preventing cold damage of rice comprises the following steps: 1, sowing seeds in good time to avoid cold damage; 2, selecting an anti-cold variety; 3, carrying out dry nursery and sparse seeding to cultivate strong seedlings; 4, applying fertilizers reasonably to ensure premature; 5, regulating temperature by using water to relieve cold damage; and 6, spraying with a self-made leaf fertilizer in a whole process to accelerate rapid filling and prematurity. The rice cultivated by the method canbe protected from being affected by low temperature, the yield of the rice is greatly higher than the yield of rice cultivated conventionally, and the economic benefit and the social benefit are obvious.

The invention discloses a ferment of agricultural products, a preparation method and an application thereof. The ferment is prepared from the following components in percentage by weight: 15 percent of compound amino acid, 5.7 percent of diammonium phosphate, 25 percent of potassium nitrate, 10 percent of monopotassium phosphate, 12.3 percent of magnesium sulfate monohydrate, 0.028 percent of monohydrate zinc sulphate, 0.072 percent of monohydrous manganese sulphate, 2.9 percent of anhydrous ferrous sulphate, 15 percent of anhydrous calcium chloride, 2 percent of phenol compound, 2 percent ofglutaminase and 10 percent of chitin. The ferment can effectively prompt crops to absorb fertilizers, reduce the use of chemical fertilizers without causing any environmental pollution, activate cellsof the crops, help the crops carry out metabolism and effectively improve the quality of the agricultural products. The ferment can also prompt the growth of the crops, improve the antibacterial effect of the crops and ensure that diseases and pests are difficult to damage parts of stems, leaves, and the like of the crops. The ferment can effectively increase the harvest of the crops and improvethe color and the refreshing time of the crops.

The invention relates to a cold damage prevention dredging agent for a low-temperature-resistant oil reservoir. The technical scheme is as follows: the dredging agent is mainly prepared from the following components in parts by weight: 3-23 parts of paraffin oil, 23-52 parts of reformed C10 solvent oil, 15-55 parts of white oil, 11-31 parts of diisononyl phthalate and 0.25-3 parts of a TX-4 emulsifier (alkylphenol and ethylene oxide condensate). The dredging agent has the beneficial effects that the dredging agent is an oil-soluble preparation and has the characteristics of low temperature resistance and cold damage prevention; and the dredging agent can quickly dilute, disperse and dissolve organic blockages in an oil reservoir, recover the porosity of the oil reservoir, improve the seepage capacity of a rock stratum, accelerate the migration speed of an oil-water mixture in the rock stratum, and achieve the purposes of improving the recovery ratio and increasing the yield.

The invention relates to the technical field of agricultural engineering, and discloses a multi-layer heat-accumulation cultivation system. The multi-layer heat-accumulation cultivation system comprises a cultivation shelf body, multiple cultivation groove supporting frames, a first driving assembly, a second driving assembly, rotary wheels and an automatic irrigation assembly; the cultivation shelf body is provided with a guide rail, the first driving assembly comprises a motor, driving wheels, driven wheels and chains, the chains move along the guide rail, multiple fixing shafts are arrangedat intervals on the chains in the running direction of the chains, and the cultivation groove supporting frames are hinged to the fixing shafts; the cultivation shelf body is a round pipe, the outerside of the round pipe is sleeved with heat collection rib sheets, and a water storage box is communicated with the round pipe of the cultivation shelf body to achieve circular flow of water in the cultivation shelf body. By means of the multi-layer heat-accumulation cultivation system, the space utilization rate of a greenhouse is increased, and solar energy is reasonably utilized to avoid the occurrence of the problem of chilling damage at night.

The invention relates to an anti-emulsification workover fluid for an offshore oilfield as well as a preparation method and a use method of the anti-emulsification workover fluid. The anti-emulsification workover fluid for the offshore oilfield comprises the following components in percentage by mass: 0.5-1.5% of a drainage-aiding cleaning agent, 0.1-0.5% of a demulsifying agent and the balance of water, the water is selected from production sewage and/or water source well water; adding water into a stirring tank, heating to 50 DEG C or above, adding other raw materials, and uniformly stirring; and controlling the in-well temperature of the anti-emulsification workover fluid for the offshore oilfield to be higher than 50 DEG C. The technical problem to be solved is how to provide the anti-emulsification workover fluid for the offshore oilfield, reduce the damage of the anti-emulsification workover fluid to a reservoir, improve the recovery effect of the oil well yield after well repair and reduce the treatment capacity of oil-water separation of a workover flow-back fluid on an offshore platform, so that the anti-emulsification workover fluid is more practical.