Key Techniques for Highly Efficient Cultivation of Citron
Citron, also known as eucalyptus, is a unique species of fast-growing timber in China. It not only satisfies the requirements of fast-growing trees and excellent materials, but also is a high-grade vegetable. The economic benefits of planting open fields are quite good. Whenever the spring blossoms, it grows green buds, commonly known as taro. As a result of its unique aromatic odor, volatile oils have a unique flavor and high nutritional and medicinal value. The market demand has increased year by year. First, choose to plant. Choose a groundwater table with a groundwater level of 2-3 meters, good drainage, and strong water and fertilizer retention. Planting methods are usually used for large and small rows, with a large row spacing of 1-3 meters, a small row spacing of 1-2 meters and a 0.2-0.3 meter spacing. If a plexiform planting method is used, the spacing is 2.5-3 meters, the cluster distance is 2 meters, the clusters are 0.3-0.5 meters, and the triangle is planted. Second, select germination. Choose a strong growth potential, strong flavor, containing more oil-resistant varieties of black oil clams, red oil clams. In Shandong, Hebei, and other provinces, generally in mid-October, when the color of the peel from green to yellow has not yet cracked, the internal germ has been harvested in time when it has matured. The harvested Citrus seeds were dried in the sun, mixed with 2 times the wet sand, and stored at 1-5° C. over winter. Before sowing in spring, seeds should be soaked in 1% formaldehyde solution for 20 minutes or soaked in 0.5% potassium permanganate solution for 1 day. Then remove the seeds, rinse several times, drain water, and put them in a wet cloth bag (or Inside the sack), after 7-10 days, a small amount of seeds can be sowed when the split nozzles expose the radicles. Third, nurturing strong seedlings. From the end of March to the beginning of April, the minimum daily temperature of 1-5 °C sowing. In the whole seed bed, the spacing is 20-30 cm or 40 cm apart, the ditch is 3-4 cm deep, and the sowing width is 6-10 cm. With the cocoon lying flat ditch at the end and pouring a small water wet ditch, the water infiltration, the seeds sown evenly in the ditch, the density to ensure that there are 25-30 seedlings per square meter is appropriate. 30-60 grams of seeds are used per hectare nursery. After sowing, finely ground 1-1.5 centimeters, evenly leveling along the ditch. If the weather is dry, you can thicken the soil or cover it with another layer of fine sand. You can also cover the surface of the mulch to protect the seedlings. After sowing, in order to prevent soil compaction, a 1-meter-high shed can be placed above the ridge and the shed can be covered with corn stalks or weeds. When the seedlings grow to a height of 10-15 cm, the cover is removed. 1-2 true leaves when the seedlings, so that the seedlings maintained at about 10 cm. 3-4 true leaves when the Dingmiao, plant spacing of 15-20 cm or 30 cm. 2-3 tablets of true leaf were sprayed with 0.1%-0.2% urea solution. When the seedling height is 20 centimeters, combined with watering, 150 kg of urea per hectare or foliar spray of 0.2% urea solution is applied. In mid-August, 187.5 kg of superphosphate and potassium sulfate are applied per hectare. Fourth, fertilize and water. Seedlings are poured 1 time after planting, and then poured again 20-30 days later. Every time after watering or after the rain, we must cultivate the grass in time. During April-May and July, each fertilizer was applied once, and 100-300 kg of urea or 150-220,500 kg of human waste was used per hectare, and nitrogen fertilizer and watering were not applied after August. In September, 750-900 kg of calcium phosphate was applied per hectare and cultivating and pouring frozen water between rows to enhance the cold resistance of the plants. In mid-November, 30 cm of earth can be planted in the roots of saplings, and the soil is removed in early spring in the following year. For the first 3-5 days before harvesting, nitrogen fertilizer or human waste shall be applied. 0.5-1 kilogram per tree and 0.1-0.2 kilogram per year for young trees. When the new shoot is about 3 cm long, the urea solution with a concentration of 0.25% is sprayed and watered after top dressing. In the spring, summer and autumn seasons, the compound fertilizer is applied once a month. Fifth, dwarf processing. The girdling can be performed between late May and June. It is possible to strip 1 bar of 1.5-2 cm wide bark on the intended branch, without damaging the xylem. From late June to early July, when the seedlings are 30-40 cm in height, the main root below 30 cm below the seedlings is cut off with a sharp shovel. The seedlings were treated with paclobutrazol 200-400 times solution, starting from the middle of July to the end of the year and starting from the end of June perennial. Sixth, weeding and weeding. Timely cultivating and weeding can reduce water evaporation, prevent surface compaction, promote gas exchange, and increase the availability of effective nutrients in the soil. At the same time, weeds can be eliminated from weeds, reducing weeds and fighting water and nutrients, and eradicating pests and diseases. Weeding has to be "in addition to early, except small, except." The combination of cultivating and weeding should be carried out about 5 times a year, and the depth of loose soil should be 3-6 meters deeper as the seedlings grow. Seventh, take a short cut. From the end of June to the beginning of July, when the seedlings are 40-50 cm high, the annual branches are topping and left to dry 15-25 cm. If it is short, it can be cut short at 15-20 cm from the ground. When the seedlings grow to 30-40 cm, the current year's shoots are short-cut from June to July, leaving 15-20 cm, with 2-3 compound leaves. After 25-30 days, 2-3 first-level branches can be extracted from the base of the compound leaf petioles. When the first branch is longer than 30 centimeters, it shall be short-cut and shall be 5-10 centimeters long, prompting each first branch to issue 1-2 secondary branches. In the spring of next year, after picking the first musk bud shoots, it is cut back to the lower 2-3 pieces of compound leaves to promote lateral branches. After two years, it can be cultivated into a dwarf tree with a height of about 1 meter and with four lateral branches. Eight, prevention and treatment of diseases. The main diseases of Toona sinensis are blight, dry blight, leaf rust and powdery mildew. In addition to preventing seedlings from becoming too dense and paying attention to reasonable watering, it is also possible to spray the rootstock with a dose of 50% 300-germson zinc. Leaf rust and powdery mildew are sprayed with 0.2-0.3 Baume degree lime sulfur or 50% eutectic wettable powder 800-1000 times spray. Nine, pest control. The pests of Toona sinensis mainly include Tetraodendron cuspidatum, Citrus aurantium and aphids. Prevention of copper green turtle shell larvae (Pteris) 50% phoxim EC 250 grams, add 250 grams of water spray or root. For citronella, 1/20 pieces of aluminum phosphide can be inserted into the defecation hole and the wormhole can be sealed with yellow mud. In June, during the peak period of aphids, it could be sprayed once with 2000-3000 times of 10% imidacloprid to disable highly toxic pesticides and pay attention to the protection of natural enemies. Tenth, reasonable picking. Before the spring branches are 20 cm long and they are not yet lignified, they can be picked before sunrise. Seedlings are planted in 1-3 years, harvested only once a year, and it is advisable to harvest 2-4 times per year after 3 years. The freshly picked toadstool buds should be immediately spread out to dampen and cool down. Avoid using plastic bags with the harvesting, which will cause the buds to heat off the leaves and reduce the quality. 512 Slice CT,Heart CT Scanner,CT Scanner Screening,Ge Cardiac CT Scanner MinFound Medical Systems Co., Ltd , https://www.minfoundmed.com