Objective  To clarify the influence of different soil compaction on the growth and development of the Anoectochilus, and to screen out the appropriate compaction required for the growth of the Anoectochilus, to provide a theoretical basis for the scientific planting and quality improvement of the Anoectochilus.

  Method  Through pot experiment, used perlite control, the soil bulk density was set to 0.7, 0.8, 0.9, 1.0 and 1.1 g·cm⁻³, a total of 5 treatments to study the effect of soil compaction on the growth and quality of Anoectochilus.

  Result  (1) Too high or too low soil compaction is not conducive to the growth and yield of Anoectochilus. When the soil bulk density is 0.9 g·cm⁻³, the plant height, ground path, number of leaves, root length and fresh weight of Anoectochilus are was the largest, with a significant increase of 14.97%, 8.70%, 6.80%, 21.04%, and 28.87% on average compared with other treatments; the drying rate is the largest when the soil bulk density is 0.8 g·cm⁻³, which is an average increase of 44.84% compared with other treatments; The soil compaction has no obvious effect on leaf length and leaf width. (2) Suitable soil compaction (0.8～0.9 g·cm⁻³) increased the content of chlorophyll a and carotenoids in the leaves of Anoectochilus, but had little effect on the content of chlorophyll b. (3) Too high or too low soil compaction is not conducive to the accumulation of C, N, P, K nutrients and quality improvement of Anoectochilus, when the soil bulk density is 0.9 g·cm⁻³, the polysaccharides, amino acids, total The content of phenol, flavonoids, and Vc was the highest, and the average increase was 36.65%, 41.79%, 23.22%, 24.10%, 13.60% compared with other treatments.

  Conclusion  Too high or too low soil compaction is not conducive to the growth and yield and quality of the Anoectochilus. When the ratio of red soil to perlite reaches 40 ∶ 1, which is the soil bulk density is 0.9 g·cm⁻³, the growth and quality of the Anoectochilus is the best.