Eucalyptus planting techniques
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First, the suitable environment Banyan tree warm climate, but not wet heat, poor climate overheating; Yunnan is mainly distributed in the 1200-2400 meters above sea level, cold resistance is not strong, only short-term temperature of about -7 °C, if After 2 to 3 days at -5°C, different degrees of frost damage will occur, lighter branchlets will die, and severe individuals will die. The eucalyptus is hi light and a slight shade can affect the growth rate. Hi fertile wet acid soil. In a good environment in Kunming, the 1-year-old seedlings can reach 1.5-2 meters in height, 9 meters in 3-year-olds, 20-meter-high in 10-year-olds, 30-meter-high in 20-year-olds, and then grow slowly, and they can blossom and become strong after 6 years. 15 Years later into the fruit period.
Second, planting seeds in November-December, spring sowing the following year, but also in the July-August seed collection, sowing the year. Each 100 kilograms of fruit can be seeded with 1.5 kilograms, with 2.8 grams of 1000-grain weight bluegrass and 1.5 grams of direct-dry alfalfa, and the seed germination rate is over 90%.
1, mother bed nursery. Choose fertile soil in the vegetable garden as a seedbed and plant it in mid-March, making it meticulously fine-grained and geographically wide, 1.2-1.6 meters wide. After soaking the seeds for 48 hours, the seeds were spread with fine sand and sown on a seedbed, covered with 1-2 cm of fine soil. After pouring the water, cover the membrane and excavate 7-10 days after sowing. The soil is kept moist, ventilated and prevented from burning at high temperature. When the seedlings grow to 5-10 centimeters in height, the seedlings are uncovered; when the seedlings grow to 30-40 centimeters in height, they should be transplanted on rainy days and become easy to survive. Transplanting is best in the middle of June in the Yuzhong area from early June to early July.
2, nutrition bag nursery. After bagging with nutrient soil, the soaked seeds are sown in the bag (2-3 capsules per bag), covered with a layer of fine feces, filled with water, and then covered with membranes to ensure proper ventilation and moisture retention. Set the seedlings during the growth period of the seedlings, pull out the weak seedlings and leave one in each nutrition bag. Until the seedlings grow to a height of 10-20 cm, they can be transplanted. Generally, seedlings are planted in early March and transplanted in the rainy season in early June.
3, seedbed management. After the emergence of seedlings, remove all weeds from the seedbed. Eucalyptus seedlings are prone to bacterial wilt, and 70% of enemy pine is used 500 times per acre (100 kg per acre) in the initial stage of disease. The seedling bed is sprayed or poured 2-3 times, each time interval is 10-15 days. .
III. Transplanting and sapling management
1, transplanting. Transplanted after the start of the rainy season in early June. Pond depth 40 cm, diameter 40 cm, 300 plants per acre (plant spacing 12 meters), after planting poured enough water, soil is higher than the surface to prevent water rot And soil compaction, conducive to the survival of saplings.
2, fertilization and pest control. After survival, 50 kg of compound fertilizer per mu or 40 kg of calcium phosphate and 10 kg of urea are used for the application in Tong Zhou. Eucalyptus is susceptible to yellow ants. After transplanting and survival, use 10% diazinon granules per acre 500 grams or 3% phoxim 1 kg acre per acre mixed in the fertilizer, apply to the pond and the soil mix, can be Control yellow ant's harm.
3, sapling management. After the survival of the young trees should be banned grazing, timely weeding the weeds around the saplings, conditional loose soil, to keep the soil loose. After 2-3 years of saplings are planted, pruning is conducted once a year and the lower and lower branches are repaired, which is conducive to ventilation and light transmission to maintain the growth of the seedlings. After 4 years, the leaves can be extracted for aromatic oils.
In summary, the cultivation and management of eucalyptus in the cultivation of strong seedlings and 1-2 years of sapling management after transplanting is critical, the management after the third year is mainly to trim the branches and cultivate the trunk into the material. Therefore, the economic, ecological and social benefits of planting eucalyptus are significant and have broad prospects.