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美国甘薯商品生产的主要成本是用苗床繁育秧苗,不同甘薯品种繁育的潜力也不同。采用缩短从苗床排种到采苗的间隔时间或者增加秧苗产量的处理,有助于降低育苗成本,对于产苗多的和产苗少的品种都可受益。在苗床排种前,将种薯置于32±1℃、相对湿度85%的条件下约3周进行催芽是提高甘薯秧苗产量的常规方法(Deonier 等,1960)。利用短期催芽(Hall,1987)、乙烯利浸种(Tompkins
The main cost of sweet potato production in the United States is the use of seedbed to grow seedlings, and the potential of different sweet potato varieties is also different. Reducing the time between seeding and harvesting seedlings or increasing seedling yields can help reduce the cost of seedling production and can benefit from more seedlings and fewer seedlings. The germination of seed potatoes at 32 ± 1 ° C and 85% relative humidity for about 3 weeks before seedbed seeding is the conventional method for increasing the yield of sweet potato seedlings (Deonier et al., 1960). Using short-term germination (Hall, 1987), ethephon soaking (Tompkins