Method for improving fruit setting rate and seed yield of tetraploid black-peel wax gourd

The invention belongs to the technical field of wax gourd planting, and particularly discloses a method for increasing the fruit setting rate and the seed yield of tetraploid black-peel wax gourds. The method comprises the following steps: (1) grafting: grafting a tetraploid black-peel wax gourd material with two cotyledons exposed out of soil and turning green to an original diploid black-peel wax gourd material with two cotyledons flattened to obtain a grafted seedling; covering a small arched shed for management, and transplanting when a grafted seedling has 1-2 true leaves; (2) management in a flowering period: spraying a water-soluble microelement fertilizer to the grafted seedlings for three times every 5 days; (3) artificial pollination: sleeving female flowers and male flowers with bagging cylinders one day before the grafted seedlings bloom, and smearing male flower pollen on stigmas of the female flowers in the morning of the blooming day; and (4) pollination management: dipping forchlorfenuron on m