Three key points to master for high-yield Gastrodia elata cultivation

I. Armillaria must be "three new"

1. New technology: new methods to obtain new strains. The new method uses the latest biotechnology to detoxify the strains, which is by far the most advanced method of obtaining strains. Among traditional Armillaria strains, the best results come from those obtained by tissue isolation or spore isolation; most units or individuals use purchased mother cultures for subculturing and expansion, so the cultivation results are poor.

2. New strains: pure isolated strains within three generations are required. The pure isolated strains referred to in this article mean Armillaria strains detoxified using the latest biotechnology; three generations means the first detoxified generation of Armillaria strain is subcultured only once, that is, used to make secondary and tertiary spawn, and no further expansion is carried out. Traditional Armillaria strains are not detoxified and, because of the need for quantity, are continuously expanded and cultured, some even transferred and cultured without limit, which reduces strain vigor, and in severe cases causes strain characteristics to degenerate; once used in production, this inevitably leads to mycelium and rhizomorphs being unable to meet the needs of Gastrodia elata growth, and the cultivation results can be imagined.

3. New log material: for cultivating log material, oak wood from the current year should be used, along with detoxified Armillaria strains. After inoculation, about 4 months are needed for the mycelium to penetrate into the xylem beneath the oak bark. On the surface, the bark is firm with no shedding; when split open for inspection, the mycelium under the bark is dense, indicating successful cultivation and readiness for planting. When directly using Armillaria strains and cut logs for cultivation, the amount of spawn used is slightly larger, but the effect is the same. It should be noted that the cut logs should be from broadleaf tree species, and pine, fir, cypress, camphor and similar species must not be used; try not to use soft-tissued species such as poplar and paulownia. Log material that has been used for more than one year can be used as spacer material to spread mycelium, but should not be used directly as cultivation material.

II. Seed corms must be "three high"

1. High technical content: the latest technology now is sexual hybridization of Gastrodia elata; hybrid vigor can enable people to obtain ideal production results. Traditional seed corms are mostly just small cormlets produced by "passing from generation to generation," so it is difficult to achieve good cultivation results.

2. High survival rate: this is one of the primary conditions. The seed corms are best white corms, preferably 10-50 grams each; most importantly, the individual must be complete, with no mechanical damage, no disease spots, no pests, etc. When observed against strong light, the seed corm is transparent throughout, with no shadow attached.

3. High corm yield: this is the final result of hybrid Gastrodia elata seed. Ordinary seed corms generally have low yield; a maximum harvest of 5 kilograms is already good, while hybrid seed corms can generally reach more than 20 kilograms, or even higher.

III. Cultivation must be "three musts"

1. Must choose a good site: the ideal cultivation site should be warm and moist, not cold and dry or waterlogged. Generally, wild wasteland, forest gaps, shady hillsides and sandy soil areas can be used; indoor spaces, basements, cave dwellings, courtyards, and concealed open spaces under vines can also be fully used. In short, by artificially creating an environment suitable for Gastrodia elata growth, it can be cultivated in any region.

2. Must manage scientifically: Gastrodia elata cultivation techniques are relatively simple, and people of any education level can learn the basic operations. After sowing Gastrodia elata, management involves only humidity and temperature, but scientific management must be adhered to. The specific cultivation management should be as follows: first, the soil at the site should maintain a certain moisture content, and water should be applied promptly during drought; second, the temperature in the cultivation bed (pond) should not exceed 28°C; third, control water, and clear ditches for drainage during continuous rain; finally, build a shade shed to avoid high-temperature rot of the corms.

3. Must harvest in a timely manner: practice has shown that timely harvesting is a very important step, but in Gastrodia elata cultivation this point is often easily overlooked, ultimately leading to situations such as "hollow corms." Generally, Gastrodia elata cultivated after November must be harvested after one year; for spring cultivation, even more so, do not delay the harvest time, so as to avoid rot and insect damage. Once bolting occurs, it loses its commercial value.