Watermelon vines have better hair rooting ability and can be used for cutting cultivation, which can save seeds, shorten the growth period, and make watermelon in the morning market.
1. Insert the source of the vine. Use watermelon vines cultivated in protected fields or other early-maturing cultivation, and cut into cuttings. It is also possible to cultivate a strong maternal body by using early-cultivation techniques in greenhouses and greenhouse cultivation.
2. Prepare for cutting. Ditching and mulching, preparation of noodle nutrient soil: 6 parts of sandy loam soil, 4 parts of decomposed manure, 1 kg of NPK compound fertilizer per cubic soil, mixed thoroughly, moisturizing and mulching, soil and manure after sieving. At the same time, prepare bamboo slabs, agricultural film, straw curtains, etc.
3. Picking vines from the mother plant. First sterilize the vine knife or scissors with 75% alcohol, then put the vine from the mother plant into a plastic bag to prevent loss of water and wilting. When selecting vines, try to select the base vine segment and keep the appropriate number of leaves.
4, cuttings. First pour the nutrient soil through the water, then cut the collected vine with a safety knife (sterilized with 75% alcohol) into small pieces with 2-3 leaves per segment, and cut one leaf of the base together with the handle, if any The leaves, tendrils, flower buds, etc. should also be cut off, and the stem segments are retained to facilitate the generation of adventitious roots. Cut the incision under the cut into a horseshoe shape, immerse in the rooting solution for half a minute, then insert the vine and the glutinous surface at an angle of 45 degrees and a depth of about 3.5 cm. The vine, the rooting solution and the cutting operation should be carried out continuously, and the small arch shed film should be placed immediately after the insertion.
5. Management. Cover the film with a straw curtain within 3 days after insertion to cover the sunlight. 4-6 days only after noon sunshade, after the 7th day, the straw curtain is removed and no longer shaded. After inserting the vine, the surface temperature of 2 cm is maintained at 28-32 ° C during the day and 20-22 ° C at night to facilitate rooting. When the local surface is 2 cm below the ground temperature of 14 ° C, it is not possible to insert vines, and it will not take root after insertion. Insulation and temperature adjustment can be adjusted by the arch film and the straw cover. Within 1-3 days after insertion of vines, the relative humidity of the air in the raft is 95-100%, 4-6 days is reduced to 90-95%, and 7-10 days is reduced to 80-85% until colonization. Within 3 days after the insertion of the vine, 0.3% potassium dihydrogen phosphate solution was sprayed once a day in the morning and afternoon. Within 1-7 days after inserting the vine, spray the rooting solution once every 1-2 days at the base of the vine, about 10 ml per plant.
6, Daejeon planting. 15-20 days after inserting the vine, the roots of the cuttings can be colonized when many adventitious roots are emitted. It can be cultivated and managed at a conventional density.
Advanced Plastic is a polymer material which has a higher comprehensive performance and can be use in long-term temperature above 150 ℃.It is mainly used in the field of high technology .So we also call it as the high performance engineering plastics or heat resistant engineering plastics.
This kind of material has excellent characteristics of light weight, high strength , good heat resistance and others and its application is from the original national defense and aerospace to the field of car, equipment, high-end consumer goods and many civilian areas.
There are many kinds of Advanced Plastic produced by Dongguan Noegem Plastic Product Co.,Ltd .
1. Production:
Polyphenylene sulfide plastic sheet (PPS plastic sheet),
PPS plastic which also called Polyphenylene sulfide.On the primary key is extremely dense and sulfur atoms of benzene ring, thermoplastic resin is high rigidity, high crystallinity, have higher strength and modulus, products can be used in the 200 ~ 224 ℃, 250 ℃ under the main performance.
2. Production:
Polyether imide plastic sheet (PEI plastic sheet),
Antistatic polyether imide plastic sheet (ESD PEI plastic sheet),
Conductive polyether imide plastic sheet (CON PEI plastic sheet),
Polyether imide plastic rod (PEI plastic rod),
Antistatic polyether imide plastic rod(ESD PEI plastic rod),
Conductive polyether imide plastic rod (CON PEI plastic rod),
PEI plastic is characterized by high intensity, high rigidity, abrasion resistance and dimension stability.PEI plastic is a transparent solid of amber, which has inherent flame retardancy and low smoke intensity without adding any additives. The oxygen index is 47% and the combustion level is ul94-v-0.
PEI plastic is 1.28 ~ 1.42 g/cm3 density, glass transition temperature is 215 ℃, thermal deformation temperature of 198 ~ 208 ℃, can use for a long time under 160 ~ 180 ℃, allows intermittent maximum temperature of 200 ℃
PEI plastic has excellent mechanical strength, electric insulation, radiation resistance, high and low temperature resistance and fatigue resistance and molding processability;The addition of Glass Fiber, carbon fiber or other filler can enhance the modification purpose.
3. Production:
Polyether ether ketone plastic sheet (PEEK plastic sheet),
Antistatic polyether ether ketone plastic sheet (ESD PEEK plastic sheet),
Conductive polyether ether ketone plastic sheet (CON PEEK plastic sheet),
Polyether ether ketone plastic rod(PEEK plastic rod),
Antistatic polyether ether ketone plastic rod(ESD PEEK plastic rod),
Conductive polyether ether ketone plastic rod (CON PEEK plastic rod),
Polyetheretherketone (PEEK) plastic is a kind of excellent performance of special engineering plastics, has more significant advantages compared with other special engineering plastics..Can be used for high-end technology such as mechanical, nuclear engineering and aviation.
Advantage :
1)Excellent chemical resistance and hydrolysis resistance
2)Excellent physical and mechanical properties
3)Resistance to high temperature is 260 degrees,
4) light and good dimensional stability
5 )excellent flame retardancy
6)Good electrical insulation and electrical stability
7 )it can be mixed, easy to process composite
8)Good self-lubrication
4. Production:
polyphenyl ether plastic sheet(PPO plastic sheet ).
PPO plastic is a special kind of Engineering Plastic, which has many features that other engineering plastics do not have:
1. Transparency: PPO plastic is one of the few transparent plastics;
2. Non-toxic: PPO plastic itself is less toxic and more suitable for food and medical applications;
3. Low temperature resistance: the low temperature of the PPO in the low temperature of minus 170 degrees centigrade, which is a lot of engineering plastic;
4. Low gravity: 1.08 g/cubic cm is slightly more dense than water;
Main features of Advanced Plastic
Heat temperature of 150 ~ 300 ℃
Advantages :
1).Good in heat resistance,
2).Good chemical resistance and radiation performance,
3).Good flame retardancy
4).Good stiffness, strength, toughness, creep, abrasion and other comprehensive mechanical properties.
Application: space aviation, defense military industry, nuclear power, electronics, transportation, machinery manufacturing, medical devices and other civil fields.
Advanced Plastics (160-220℃)
Advanced Plastic,Advanced Technology Plastic,Excellent Quality Advanced Plastic
Dongguan Noegem Plastic Products Co.,Ltd , http://www.noegempLastic.com