Teak cultivation techniques
Teak, also known as rouge tree, purple teakwood, and blood tree, is a kind of deciduous or half-deciduous tree, with trees up to 40-50 meters in diameter, 2-2.5 meters in diameter at breast height, and straight through. Teak originates from Burma, Thailand, India, Indonesia, Laos, etc. It is the main afforestation tree species in Southeast Asia. It is also one of the world's most valuable timber materials. It is an excellent material and has a wide range of uses. It is an important material for world warships and marine demand navigation. Seaports, bridges, carriages, mahogany furniture, carvings and plywood. The tree is full of trees, and the trees are high in foliage. It is also a valuable tree species in the landscape of the garden. First, characteristics. Teak is a precious timber species that is promising in the tropical and subtropical regions of China. Tea trees from China, including Yunnan and Taiwan, have a long history. In Xishuangbanna, there are trees that have more than one hundred years and a diameter of more than 1.2 meters. Vertical distribution is more common in low hills and plains below 700-800 meters above sea level. Teak is a tropical tree species and requires higher temperatures. The annual average temperature in the country of origin is 20°C-27°C, the absolute low temperature is 2°C, and annual rainfall is 1100-3800mm. The wet and dry seasons are obvious. Strong positive tree species can grow on sandy shale, granite red soil and red soil, like deep, moist, fertile, well-drained soil. Planting can be promoted in places without low temperature frost (-1°C-2°C) and sheltering. Teak grows fast, has a strong sprouting force, and can sprout after cutting. The best growing stand on Hainan Island, before 10 years of age, the average annual growth was 1.5 meters high and the diameter was 1.6 centimeters; the general stands were also 1 meter high and about 1 centimeter in diameter. Second, seed sowing. Seeds are harvested in January-February and are brown or light brown. After harvesting the fruits, the spent flower capsules are removed, dried, and bagged. 1000-grain weight 750-100 grams, germination rate of 50% -80%. Before sowing, the seeds were soaked with immersion. The seeds were spread on the cement floor. When the surface temperature was highest in the afternoon, the seeds were soaked in cold water overnight and soaked in the sun for a week to sow. This method works well when the temperature is high. The first sowing, sowing about 100 grains per square meter. After sowing, the seeds are pressed into the soil with wooden planks, so that the exposed side of the seeds is flat with the surface of the bed, and avoid covering the soil. After germination 14-20 days after sowing, 2 seedlings per seed and 3 seedlings were found. Third, planting seedlings. When the seedling height is 3-5 cm, two true leaves appear, which are transferred into the container bag and cultivated. The seedling height is 30-40 cm and afforestation is possible. Afforestation crypt-site preparation, acupuncture size 505040 cm, 100-250 g compound fertilizer per hole as base fertilizer. Afforestation density in the better site conditions of the tableland, plains, 1050-1200 per hectare; good mountain sites 1200-1350 / ha, spacing 3-4 meters. Fourth, mixed afforestation. Teak leaf is large, fast-growing in the early stage, and it is not resistant to the shade, and the initial planting density is not large. It is best to use mixed afforestation. The associated tree species can be selected from firewood, Schima superba, red vertebrae, bayberry, and cypress, etc., and the mixed ratio is 1:2. -3 other associated trees, mixed methods with irregular uniform opening. After afforestation, teak is afraid of weeds. Within 3-4 years, weeding is done 1-2 times a year and the roots of the trees are removed, leaving a single vigorous shoot. After forest closure, the relationship between species should be adjusted in time to ensure stable growth of the nutrient space and forest stand with the main purpose of the operation.