The soilless culture method for the
caragana microphylla in the underground three-dimensional farm comprises the steps that high-quality
caragana microphylla seeds are selected, then the seeds are soaked and subjected to constant-temperature
oxygenation treatment, then water is drained off, and under the controlled temperature,
humidity and illumination conditions, seed
germination accelerating treatment is conducted to promote seed
germination. The germinated seeds are sown in a
seedling culture medium, temperature,
humidity and illumination management is conducted, and
germination of the seeds is promoted. When the true leaves of the seeds grow to a certain height, the stem
diameter and time are counted. According to the method, the seeds are systematically pretreated, so that the dormant state of the seeds is effectively broken, the problems of non-uniform germination and overlong germination time caused by improper environment or improper treatment are reduced, the germination rate is increased, and the germination time is shortened. Particularly, by controlling the components and proportion of the
seedling culture substrate and the illumination condition of
artificial light, the optimal condition can be provided for rapid growth of
caragana microphylla seeds, the
seedling culture period is shortened, and the seedling culture quality is improved.