After planted one generation, tulip imported into China had not been widely used because of the degeneration of the second generation seed corms.
我国目前引种的郁金香经第一代种植后，第二代种球由于普遍退化而未充分加以利用。
Washing corms with running tap water overnight before sterilization were effective for reducing surface epiphytic microorganisms significantly and depressing the rate of contamination.
此外，表面灭菌前采用流水冲洗过夜可有效减少球茎表面附生菌，明显降低污染率。
Moreover, corms used for vegetative propagation are susceptible to disease, tissue senescence and degeneration, and the merits will be declined along with the process of storage and cultivation.
而球茎繁殖是营养繁殖方式的一种，容易感染病毒，随着储存和种植时间的延长，易出现衰老和退化现象，使香雪兰的品质下降。
Moreover, corms used for vegetative propagation are susceptible to disease, tissue senescence and degeneration, and the merits will be declined along with the process of storage and cultivation.
而球茎繁殖是营养繁殖方式的一种，容易感染病毒，随着储存和种植时间的延长，易出现衰老和退化现象，使香雪兰的品质下降。
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