1 育苗。父本12月初播种,母本12月15～20日播种(父本比母本早播15～20日),父本双株分苗,母本单株分苗。 2 整地。3月5日前扣棚,每亩普施优质农家肥5000kg、尿素50kg、过磷酸钙50kg,耕翻两遍,按1m起垄,垄高20cm～25cm,覆盖地膜,以升高地湿。 3 定植。定植前2～3天,分苗床浇一次透水,以利起苗时切土块护根,定植期为3月15～20日,定植时切土块护根起苗,按一垄双行,穴 1 nursery. Parents planted in early December, the mother of December 15 to 20 days of sowing (male parent than the mother of the early sowing 15 to 20 days), the parent double plantlets, the female plant single plantlets. 2 site preparation. March 5 before the shed, per mu Pu Pu quality farm manure 5000kg, urea 50kg, superphosphate 50kg, plowing twice, according to 1m ridge, ridge height 20cm ~ 25cm, covering the film to raise wetlands. 3 colonization. 2 to 3 days before planting, the sub-seedbed poured once pervious to the benefits of seedlings cut when the root nursery, planting period of March 15 to 20, when cutting soil block planting seedlings, according to a ridge double line, hole