What is the difference between hydroponics and undergrowth planting of anoectochilus roxburghii?

Oncidium plant is 8-18cm high. Rhizomes are creeping, elongated, fleshy and jointed, and take root at nodes. Stems erect, fleshy, cylindrical, with (2-)3-4 leaves. Leaf blade ovoid or ovoid, length 1.3-3.5cm, width 0.8-3cm. The top is dark purple or dark purple, with a beautiful golden red net with spun silk luster, the back is reddish purple, the apex is near sharp or slightly blunt, the base is nearly truncated or round, and suddenly shrinks into a handle. The petiole is 4- 10 mm long, and the base expands into a sheath that covers the stem. Racemes 2-6 flowers, 3-5 cm long; Inflorescence axis is reddish, peduncle is pilose, and peduncle has 2-3 sheath bracts; Bracts are reddish, ovate-lanceolate or lanceolate, 6-9 mm long and 3-5 mm wide, and the tip is tapered, which is about 2/3 of the length of the ovary; Ovary long cylindrical, untwisted, pilose, pedicel length 1- 1.3 cm; Flowers white or reddish, not inverted (lips above); Sepals are pilose on the back, the middle sepals are oval, the depression is boat-shaped, about 6 mm long and 2.5-3 mm wide, and the top is tapered, which is pocket-shaped when bonded with petals; Lateral sepals open, obliquely oblong or oblong-elliptic, 7-8 mm long, 2.5-3 mm wide, and slightly pointed at the top. Petals thin, nearly falcate, as long as middle sepals; The labellum is about 1.2 mm long, Y-shaped, with conical distance at the base, 2-cleft expansion at the front, nearly oblong or wedge-shaped oblong lobes, about 6 mm long and about 1.5-2 mm wide, with the whole edge, obtuse top, 4-5 claws in the middle and 6-8 tassels about 4-6 mm long on both sides. The pistil is short, about 2.5 mm long, and there are 1 wide flaky appendages on both sides of the front; Anthers ovate, 4 mm long; Beak erect, bifurcated and 2-lobed; Stigma 2, free, located on both sides of beak base. Flowering: (8-) 9-11(-12) month.