Dafang Tianma has a unique intrinsic feature with high content of gastrodin and rich trace elements. It has a significant effect on the vertigo, head wind, headache, etc. Because the texture is relatively solid and heavy, the ring pattern is less, the top bud is smaller, the section is more uniform, and the specific odor is more intense. There is a saying that "China's Tianma counts Guizhou, Guizhou Tianma has a generous number" and is named by the China Food Industry Association. The title of China's Tianma Township.

Generous gastrodia quality technical requirements (1) varieties. Red Tianma, Wu Tianma. (2) Site conditions. 1. Red Gastrodia: Mountain deciduous broad-leaved forest, broad-needle mixed forest, mixed bamboo and shrub forest with an altitude of 760m to 2000m, with a shade of 50% to 75%. The soil is mountain yellow brown soil, yellow sand soil, surface litter layer and humus layer ≥1cm. The pH is 4.5 to 6.5. The environmental quality has reached the national secondary standard. 2. Wu Tianma: Mountain deciduous broad-leaved forest, broad-needle mixed forest, mixed bamboo and shrub forest with an altitude of 760m to 2000m, with a shade of 60% to 75%. The soil is mountain yellow brown soil and yellow sand soil, and the surface litter layer and humus layer are ≥3cm. The pH is 4.5 to 6.5. The environmental quality has reached the national secondary standard. (3) Planting management. 1. Breeding and seeding of hemp species: (1) Sexual breeding: use a single weight of more than 100g originating from the generous territory, rough and short in hemp shape, no pests and diseases, no mechanical damage, no rot spots, no damage to the top buds. No abnormalities of arrowheads for planting hemp. Seeds are planted, artificially pollinated after flowering, and after the fruit is ripe, it is sown in the bed. Carefully managed, the seeds are taken before cultivation in the next year to ensure that the growth time of the hemp species is not less than 16 months, and the red gastrodia is not less than 6 months. (2) Asexual reproduction: The first to third generations of white hemp and rice hemp, which are asexually propagated under cultivation conditions, are used as hemp species. 2. Preparation of secret bacteria and germination bacteria: According to the routine of microbial production, culture of one to three strains is carried out. The third stage strain is used directly for production. In the end of May, the bed of fungus breeding is cultured in a random loop, and inoculated according to the ratio of 100:3 bacteria and strains; from mid-July to the end of August, the ratio of the bacteria and the strain is 100:2. Cyclospores, fungi. 3. Planting: (1) Planting time: from early November to early March of the second year. (2) Preparation of planting land: Red Tianma chooses a forest with a canopy density of 50% to 75%; 1 planting hole is drilled every 1.5m to 2.5m under the forest, and trees should not be destroyed when digging holes. A layer of 3cm to 5cm thick leaves is laid at the bottom of the hole, or the soil at the bottom of the hole is dug; a layer of fine soil or fine humus is sprinkled. The area of ​​each hole is 0.5 m2 to 1 m2, and the total area planted under the forest must not exceed 8% of the forest area. Wu Tianma chooses a forest with a canopy density of 60% to 75%. One planting hole is drilled every 1.5 to 2.5m under the forest, and the trees must not be destroyed when digging holes. A layer of 5cm to 7cm thick leaves is laid on the bottom of the hole, compacted; sprinkle with a layer of fine soil or fine humus. The area of ​​each hole is 0.5 m2 to 1 m2, and the total area planted under the forest must not exceed 8% of the forest area. (3) The next kind: mix the new material with the honey fungus in the planting hole, or evenly place the third-class strain next to the new material, leaving a gap of 5cm to 8cm wide around the hole. When the hemp seeds are placed, the contact surface with the honey ring bacteria or the third-class bacteria is as large as possible. After planting, fill the gaps in the hole with fine soil or fine humus soil, lay a layer of fallen leaves, cover with humus soil, and finally use a breathable covering to shade and moisturize. (4) Management: Drainage should be opened according to the terrain to prevent water accumulation in the cave; when it is dry, pay attention to moisturizing, thicken the cover layer, etc.; prevent rodents, insects, and prevent human and animal trampling. (5) Harvesting: The arrowhead is harvested from the end of October to the beginning of March of the following year to ensure that its growth time is not less than one year. (6) Processing: Wash the arrow hemp and steam to the heart; dry until the surface of the gastrodia is wrinkled, then seal the sweat; then dry until the surface of the gastrodia wrinkles again, then sweat; finally dry to dry. 4. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. (4) Quality characteristics. 1. Sensory features: (1) Red Tianma is long oval or long strip, flat, shrinking and slightly curved, ring-shaped multiple rounds, point-like dense, sometimes visible brown fungus. The body is firm and heavy; the top bud is larger and the specific odor is stronger. (2) Wu Tianma: oval or imitation hammer shape, slightly flat, a short fleshy, shrinking and slightly curved, ring-shaped multiple rounds, point-like sparse, sometimes visible brown fungus. The body is firm and heavy; the top bud is small and the specific odor is strong. 2. Physical and chemical indicators: (1) Red Tianma body length ≥ 4cm, width ≥ 2cm, thickness ≥ 0.3cm; gastrodin content ≥ 0.30%; water ≤ 15.0%. (2) Wutianma body length ≥ 4cm, width ≥ 3cm, thickness ≥ 0.6cm; gastrodin content ≥ 0.30%; water ≤ 15.0%. 3. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

Apply to：
Producers within the scope of protection of Dafang Tianma Geographical Indication Products may apply to the Guizhou Entry-Exit Inspection and Quarantine Bureau for the use of the “Special Mark for Geographical Indication Products”, which shall be approved by the General Administration of Quality Supervision, Inspection and Quarantine.