What are the technical elements of artificial cultivation of Gastrodia elata (tianma)?

(1) Change from wild to domestic planting.

(2) Adopt single-layer and double-layer cultivation, and further develop to three-layer cultivation.

(3) Use the fungal-wood companion planting method to add covering wood to both the upper and lower layers, so that the fungal threads grow both upward and downward, and the fungal threads in the middle layer interweave into a network from top to bottom, which is more conducive to the growth of Gastrodia elata.

(4) When using large tree branches and knots as fungal wood, pay attention to using small branches and knots, which not only saves wood but also makes it convenient to use local materials in plain areas, making full use of raw materials.

(5) Use wooden box cultivation and brick pool cultivation, or directly pile cultivation, pit cultivation and bed cultivation without any container, thereby expanding the planting range and reducing production costs.

(6) In the culture material formula, use half sawdust and half river sand, or 40% sawdust, 30% river sand, 30% rice husk, plus 0.01% potassium dihydrogen phosphate and magnesium sulfate, as trace element supplements.