Dingxiang Huang Tan (Hainan Huanghuali) Planting Technology

1. Selection of seedlings: First, the selection of species should be correct. Commonly known as "rosewood" Tree species are relatively confusing: such as "Palmwood, flowers Limu, Hualimu, Cauliflower, pear, Hainan Dalbergia" and so on, it is difficult to distinguish. In fact, the name "Dingxiang Dalbergia" named after the State Forestry Administration in 1987 is the only standard name.

Dalbergia odorifera T. Chen. is a genus of leguminous plants, Dalbergia odorifera, and English name: Scentedros wood (scented redwood). It is one of the national standards of 5 genera and 8 species of 33 species of redwood. Dalbergia Dingxiang alias: pear, pear mother, descending fragrant wood, incense mahogany. Dalbergia wood commonly known as "rosewood." Secondly, we choose healthy, disease-free and annual healthy plants with about 40-50 cm in height and 0.8-1.2 cm in diameter. In order to better improve the survival rate, the use of bagged seedlings and container seedlings to afforest the hills will not only prevent seedling emergence (slow seedling emergence), but also have a survival rate of more than 95%.

2, planting season: generally choose spring afforestation. However, the differences in temperature vary from region to region: In spring and rainy areas such as Fujian, Guangdong, and Guangxi, it is advisable to plant afforestation from March to June. If there is water source irrigation, planting seedlings can also be planted from July to August; planting in Hainan Province. The season is relatively late. In August-September, it is the best afforestation season. If bare roots are used for afforestation, the root system must be protected during transport, and survival is more secure. 3, site conditions: Dalbergia Dalbergia on the site conditions are not strict. In areas with steep slopes, ridges, bare rock, and drought-stricken areas, it can be adapted to life. This species is a positive tree species, low-altitude plains or hilly areas, barren hills and wastelands below 600m above sea level, and sunny slopes and semi-sunny slopes of harvested land. The annual temperature is relatively high, and the dry and wet seasons are obvious. The soil is brown brick red soil and red soil. Soil types can be afforested. 4, before afforestation, usually before the advent of the rainy season, according to conventional preparatory work before planting trees: chopping miscellaneous impurity removal, mountain refining, planting acupuncture points. Planting hole specifications: length, width and depth, about 50cm50cm40cm. When afforestation, it is advised to plant a hole and avoid planting water. Afforestation plant spacing, depending on site conditions, water and fertilizer conditions are good places for the 3M2.5M, 90 per acre; if the land is not fertile, rain less than the area used 2M2.5M specifications planting, per acre planting 120 strains. 5. After digging the planting holes, backfill the topsoil before starting planting, and then put in the base fertilizer. The amount of each plant: compound fertilizer 150 grams, 300 grams of calcium magnesium phosphate, combined with backfill mixed, and then planted on the seedlings. When planting, it is necessary to pay attention to proper deep planting to avoid exposing the base of the ground diameter. At the same time, “root Shu, Miaozheng, and Tightening” should be done. The backfill soil should be slightly higher than the hole surface and form a small “w” shape so as not to sink the tree hole after the rain. Shape, to avoid causing root water, buried in soil, so as not to rot.
5. Tenderling of saplings: In the year after planting, loose soil and sorghum were conducted at the end of the rainy season (September). In the third year from the second year, tending and management should be strengthened. The method is to remove the shrubs within a diameter of 1 meter around the tree plate with the seedlings as the center, and fertilize with the soil. Each time before and after the rainy season of the year, it is better to have one more tending in the middle. Fertilization: Combine loose soil, weeding, and acupuncture points, apply 150-200g of compound fertilizer per plant at a time to promote the growth of forest trees, make them close to forests as soon as possible, and reduce overgrown weeds. Pruning: Lower pear branches, thicker lateral branches, care should be taken to trim the branches, nurturing good rods shape. However, it should be noted that in the first 1-2 years of young forests, do not prematurely and excessively cut off all lateral branches. It is necessary to leave more leaves in order to increase photosynthesis. As the age of the trees grows, young forests gradually grow taller before they are gradually pruned upwards. In this way, it is beneficial to increase the photosynthesis of plant leaves at young planting stage, which helps the growth of young forests and the development of root systems. 6, the main pest control Dalbergia sinensis seedling and sapling period, common leaves with lesions. In the rainy season, the spread is relatively rapid. When it is severe, the entire leaf appears black, causing the leaves to fall off in large numbers and seriously affecting the growth of young trees. In addition. Anthracnose can also occur on young leaves and shoots, on the leaves. A roundish brown lesion appeared, with black dots on it; on the shoot, the lesion appeared black and gradually dried up. The above two diseases were sprayed with 70% mancozeb WP or 5% thiophanate-methyl 500-fold solution, sprayed once every 7 days, and sprayed 2 or 3 times in total, which had better control effect. . Artificial young forests are mainly endangered by calfs. Damaged young trees often cause the wind to fall or die. In the larval stage, 90% trichlorfon or 50% phoxim 300-400 times liquid can be injected from the wormhole with a veterinary syringe, and then the pores can be closed with a cotton swab. This method is the most effective method for preventing and curing Tianniu. . 7, the main purpose of the use of wood: Dalbergia Dendrobium heartwood the most valuable, after planting 7 to 8 years after the formation of heartwood. The heartwood is reddish-brown, with dense and hard texture. The texture is delicate and beautiful. It naturally forms a natural pattern (commonly known as “grimace”), which is resistant to wear and tear, does not crack and warps, and emits fragrance. It is durable and is made of high-grade mahogany furniture and handicrafts. The finest materials, such as musical instruments and carvings, inlays, and art decorations, are the same as imported rosewood. The reduced sesame oil obtained after the wood is distilled can be used as a flavoring agent on spices. The root heartwood and trunk heartwood can be used for medicinal purposes as a good analgesic agent. Greening purposes: In recent years, Guangdong, Fujian and other places have been used as green trees. Can be green, but also available timber, a tree and more energy, double benefits. However, when cultivated as a green seedling, it is necessary to pay attention to pruning, highlight the main pole, and cultivate a dignified tree. (Information provided by: Zhangpu County Dashan Nursery Farm)

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CAS NO.: 1078-21-3

M.F.: C10H14ClNO2

M.W.: 215.677

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