Artificial Breeding Experiment on Campylotropis polyantha in Dry Valleys of the Upper Reaches of the Minjiang River

Campylotropis polyantha plants are rich in resources in the dry valley area of the upper reaches of the Minjiang River, and most of them are found in the shrubs of rocky mountains, dry land and streams along the hillsides and sunny places. The Associated plants are mainly leguminous and Rosaceae. There were few studies of the Campylotropis polyantha in this area, hence researches were made on the artificial breeding of the Campylotropis polyantha in order to promote the flowering scorpion shoots as drought-resistant species or landscape plants.It could be propagated by seed they were dibbled and twig cutting. The seeds were pretreated by soaking and germination method, and the seed germination rate reached 82.65% at 60℃ water temperature soaking treatment. After seed germination, in the field, under good field management measures, the growth of the flowering scorpion shoots could reach more than 90 cm in that year, and they could bloom once in the same year. Campylotropis polyantha was generally selected by cutting shoots. Under the treatment of the root-promoting reagent solution, the rooting rate of the cuttings could be greatly improved, with the highest concentration of 200 mg·kg^-1 and the rooting rate of 84.33%. The resources of Campylotropis polyantha in the arid valley of the upper reaches of the Minjiang River are widely distributed, and the seed collection is relatively easy. The seedlings germinated with seeds have strong stress resistance, and the cost of seedlings is lower than that of shoots. Therefore,the priority can be given to the seed propagation method when a large number of seedlings are bred.