Zucchini is a kind of vegetable with short growth period and quick effect. It has the advantages of better storage and transportation, higher yield, suitable for interplanting, etc. The edible part is the tender melon. Seeds of grain weight 140 ~ 200 grams, the seed life of 1-2 years, 300 grams of seedlings with mu.
1. Variety selection The varieties should be selected from low-temperature, early-maturing and short-rand varieties, such as hybrids, such as the early-young generation, the gray celebrity, the early anti-tender jade, the jade beauty, the American early morning king, the emerald, and other hybrid generations.
2, nursery cultivation, the first year of December first seedlings, seedling age 15-20 days. In the open season, the seedlings are raised from January to February, and the seedling age is 30 days. The seedlings should be planted on the protected land. Before sowing, soak in warm soup, pour into warm water at 50-55°C for 15 minutes, soak at room temperature for 8-10 hours, rinse and moisturize under heat preservation at 25-30°C, wash three times a day, two days to germinate. .
3. Prepare 6 parts of loam soil for earthworms and 4 parts of decomposed earthworm feces. After sieving, mix evenly. Add 150 kg of cooked earthworm feces and 5 kg of compound fertilizer per cubic meter of bed soil. Evenly mix and fill the nutrition bags. When sowing, put one seed of germinated seed into each bag. Seeds must be placed flat, then cover with 2 cm of fine soil to cover the mulch and dome film. Flat seedlings are easy to shell out when they emerge. Before the emergence of bed soil temperature 15-18 °C, keep the temperature at 28 °C, 3-5 days can emerge. After the emergence of the seedlings, the temperature of the arch shed is controlled at 20-25°C. If it is found that the seedlings are not shelled, the shells should be picked manually. In order to prevent leggy, the night temperature can be controlled at 15 °C, 5-7 days before planting, can be reduced to 7-8 °C, in order to exercise the resistance of Gualou.
4. When the second true leaf of the fruiting seedlings emerges at the seedling stage, shading nets will be used before the time from 10:00 am to 5:00 pm to make the daily sunshine hours of 8 hours to promote female flower differentiation. During the nursery period, water should be reduced or watered. Keep dry and wet.
5. Fertilization for planting and soil preparation, 5000 kg of high-quality farmyard fertilizer per acre, 1,000 kg of poultry manure, 50 kg of superphosphate, 30 kg of potassium sulfate, and 20-30 kg of ammonium bicarbonate. After deep-turning the land, a large row of 70 to 80 centimeters, 50 to 60 centimeters away from the row, fertilizes, fertilizes the soil and mixes the soil and ridges on the row. The ridge height is 15 to 20 centimeters. Double-row planting can be used for empty ponds, depending on the variety, the planting density is 1800-2200 plants per acre, and the plants are transplanted with soil and the root water is poured. Appropriate control of watering after easing seedlings
6, field management, watering and fertilizing: Zucchini ripe early, long harvest period, high yield, large amount of fertilizer required, after planting survival can be gradually enriched with clearing water once every 5-7 days, or 15 cm from the root Trench Mushi urea 15 kg cover soil watering. In the middle and late period, increase the application of phosphate fertilizer to prevent premature aging. After the start of harvesting, the fertilizer is chased once every 10-15 days, and 10-15 kg of compound fertilizer is used per acre.
7. Adjusting the vines by plants: For semi-invasive cultivars, when there are more than 8 leaves in the plant, the vines and vines must be hung. The growth of plants in the field is often of different heights. It is necessary to carry out whole vines, support weak and strong, and make the plants uniform in height and shade without shading each other. The lateral buds formed on the main vines must be removed at any time when hanging vines and vines.
Falling vines: When the height of the vines is high, the harvest of the lower fruits must be promptly settled so that the plants and leaves are evenly distributed. When falling, remove the lower leaves and yellow leaves. When removing old yellow leaves, the wound should be far away from the main vine to prevent the bacteria from infecting the wound.
Baoguo: In winter and spring, the temperature is low, pollinating insects are few, and the zucchini has no single sexual intercourse. It often causes flowering or melons due to poor pollination. Therefore, it is necessary to conduct artificial pollination or treatment with hormones such as decanoside in order to ensure that it is sitting on the melon. The method is to remove the male flowers that are open on the day from 9 to 10 am, remove the corolla, and gently apply on the female stigma. It is also possible to use a 30 to 40 ppm anti-dropping agent or other solution to apply the primary flower stalk.
8, harvested zucchini mainly to eat tender melon, 10-12 days after flowering, single melon weight up to 200-250 grams can be harvested, harvesting too late will affect the growth of the second melon, grow more plants appropriate to stay melon , leaving large melons, appetizing plants to pick melons late; weak plants should stay less melon, early mining melon. When harvesting, care should be taken not to damage the main vines. The stalks should remain on the main vines as much as possible.
Everything You Need To Know About LED Lighting
LEDs are a simple invention with huge potential to change the lighting industry for the better. Don`t know much about them? Here are three big things you need to know to get your feet under you:
1.What Does LED Stand For?
2.LED stands for light-emitting diode.
A diode is an electrical device or component with two electrodes (an anode and a cathode) through which electricity flows - characteristically in only one direction (in through the anode and out through the cathode). Diodes are generally made from semi-conductive materials such as silicon or selenium - substances that conduct electricity in some circumstances and not in others (e.g. at certain voltages, current levels, or light intensities).
2.A light-emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. It is essentially the opposite of a photo-voltaic cell (a device that converts visible light into electrical current).
Did You Know? There is a similar device to an LED called an IRED (Infrared Emitting Diode). Instead of visible light, IRED devices emit IR energy when electrical current is run through them.
1.How Do LED Lights Work?
2.It`s really simple actually, and very cheap to produce, which is why there was so much excitement when LED lights were first invented!
The p-type and n-type materials are created by introducing the original material to atoms of another element. These new atoms replace some of the previously existing atoms and in so doing, alter the physical and chemical structure. The p-type materials are created using elements (such as boron) that have less valence electrons than the intrinsic material (oftentimes silicon). The n-type materials are created using elements (such as phosphorus) that have more valence electrons that the intrinsic material (oftentimes silicon). The net effect is the creation of a p-n junction with interesting and useful properties for electronic applications. What those properties are exactly depends mostly on the external voltage applied to the circuit (if any) and the direction of current (i.e. which side, the p-type or the n-type, is connected to the positive terminal and which is connected to the negative terminal).
Application of the Technical Details to LED Lighting:
When a light-emitting diode (LED) has a voltage source connected with the positive side on the anode and the negative side on the cathode, current will flow (and light will be emitted, a condition known as forward bias). If the positive and negative ends of the voltage source were inversely connected (positive to the cathode and negative to the anode), current would not flow (a condition known as reverse bias). Forward bias allows current to flow through the LED and in so doing, emits light. Reverse bias prevents current from flowing through the LED (at least up until a certain point where it is unable to keep the current at bay - known as the peak inverse voltage - a point that if reached, will irreversibly damage the device).
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