Grafting tomato cultivation is an important technical measure for high-yield and high-quality cultivation of tomato disease. It fundamentally solves the problem of heavy damage and difficult prevention of "green wilt disease", and changes the tomato's ability to reproduce the cropping situation and develop tomato production. Increasing the income of farmers, especially increasing the income of farmers in mountainous areas, has played an extremely important role. Practice has proved that technological progress is one of the important conditions for developing production and increasing efficiency. To ensure that tomato grafting cultivation increases income and efficiency, we should grasp the following key technologies.
First, select the rootstock and scion variety
1. Rootstock is the basic condition for the success of grafting cultivation. It must not only have stable and high-level resistance to "green blight", but its growth potential, adaptability and stress resistance should be better than that of scion varieties, and with different types of scion varieties. Have a good affinity.
2, the advantages and disadvantages of the scion, mainly affect the economic benefits of grafting cultivation. Good scion varieties should have good yield, and the product (fruit) should be suitable for the needs of dealers, that is, long-distance transportation and storage, and also have better adaptation to local conditions such as climate and soil. Sexuality, that is, the effects of stress-tolerant climates such as rain, drought and heat. The economic benefits of tomato production are often negatively correlated with the climate's advantages and disadvantages. Therefore, scion varieties that have better adaptability to adverse weather conditions should be selected to reduce the production cost of disease prevention and control, and improve economic efficiency and product quality.
Second, grasp the rootstock and scion foundation seedlings
The basic seedling mentioned here refers to the seedling stage before grafting. Grafting is a scion for artificial root replacement. Plants are heavily wounded and wound healing takes a long time. The rootstocks and scion seedlings used for grafting must be robust and free of pests and diseases. The specific requirements are: timely sowing, seedbed flat, germination and sowing, seedlings, planting, temperature and humidity control, pests and diseases, stems and leaves are green, and there is no worries. In the basic seedlings, it is especially necessary to strengthen the water control and refining of the scion.
Third, timely grafting
Grafting should be carried out as far as possible on a cloudy day and the relative humidity of the air is 70-90%, and the soil holding capacity of the seedbed is about 50% (semi-dry and semi-wet). According to the favorable climatic conditions during grafting, high grafting and low position can be adopted. Grafting two methods.
1. High-level grafting: 5-6 pieces of rootstocks in the true true leaf stage, leaving 2 true leaves cut at the base of the plant, 2 leaves and 1 heart in the scion, cut into wedges, cut off the leaves, spliced ​​to the center of the rootstock of the rootstock, with a round shape The grafting clip is fixed.
2, low-level grafting: 4-6 pieces of true leaves of the rootstock, cut under the first true leaf of the base (only leaves cotyledons, no true leaves), the other operations are the same as high-level grafting.
Fourth, after the management of
"Three-point, seven-point management", the survival rate after grafting, mainly depends on post-administration, especially the first three days of management.
1. Scion prevention and loss of water: When the scion is cut away from the mother, it will lose physiologically in the air, affecting the healing process after grafting, and irreversibly permanent wilting when severe water loss, unable to heal. seedling. In order to minimize the degree of physiological wilting, completely avoid permanent wilting, pay attention to the following points:
1 Before grafting, the concentration of scion cell liquid should be higher than that of the rootstock, so that the osmotic pressure of the rootstock can be supplied to the scion in time.
2 In the healing period after grafting and grafting, strict shading measures should be taken to reduce transpiration and evaporation, weaken photosynthetic and respiratory processes, and the grafted seedlings should be in a “dormant†state to facilitate wound healing. The degree of shading can be determined according to the light intensity.
3 After grafting, cover the seedling crown with ultra-thin agricultural film in time, and keep it moisturized.
4 After 3-4 days, gradually reduce the shading rate, and remove the agricultural film. If the scion does not wilting, it indicates that the wound has completely healed, and the seedling can be trained, and then sprayed to prevent disease.
2, grafting wounds to prevent infection: the main cause of wound infection is the humidity and temperature of the seedbed, the number of pathogenic bacteria is large, and the wound is contaminated by water droplets. Prevention method: 2-3 days before grafting, use 72.2% Baolix (or Plex) 25ml water 25kg to spray the seedbed to prevent the humidity of the seedbed from being too high. After grafting the film, there is a thin layer of water mist on the membrane. Yes, there should be no water drops.
Total 1 | <First <Prev 1 Next> Last> |
share to:
Electric BALL VALVE is operated by Electric Actuator, the actuator has open close type and regulating type, power 24VDC, 220VAC. valve have different type and material for optional, socket welding and flanged type, PVC, CPVC, PVDF, PP, PPH, EPDM, PTFE lined. standard following DIN, ANSI, JIS, pressure rate of PN10, PN16, 150LB, 10K. size from 1/2" to 12", limited switch, Solenoid Valve are optional.
Ningbo RMI Plastic Co.,Ltd offer electric Ball Valve with specification:
Size:DN15~DN300 (1/2 inch ~ 12 inch)
Connection: Flange DIN PN10, ANSI CL150, JIS10K; socket DIN, ANSI, JIS, CNS, BS; Thread BSPT, NPT.
Body Material: PVDF,PVC,CPVC,PP,PPH,PTFE lined WCB
Seal material: EPDM;FPM;FKM;VITON
Seat Material: PTFE
Design pressure:1.0Mpa(PN10 bar)
Actuator:Electrical
Operating type:Open/Shut, Regulating
Power supply:DC24V;AC220V;AC380V
Electric Ball Valve,Ball Valve Electric,Electric Control Ball Valve,Electric Valve
Ningbo RMI Plastic Co.,Ltd , https://www.rmiplast.com