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纳罗克非洲狗尾草(Setaria sphacelata cv.Narok)是南方广大地区草地建设和环境治理最优秀的禾草之一。但其种子产量低,休眠程度深。以云南省生产的纳罗克非洲狗尾草商品种子为研究对象,通过机械方法去除稃片后,采用化学处理、温水浸种、液氮冷冻提高种子活力,结果表明:机械处理去除稃片后,再用0.4%KNO3溶液浸种12min是最好的处理方法。处理后,种子发芽势为34%,发芽率达到42%,发芽指数为9.88,而活力指数则达到了0.0130,种子活力几乎是对照的4倍(P<0.05)。
Setaria sphacelata cv. Narok is one of the finest grasses in the southern part of the world for grassland construction and environmental management. But its seed yield is low, deep sleep. After the seeds of Narodhenia foxtail genus were produced in Yunnan Province, the seed vigor was removed by mechanical treatment, warm water soaking and liquid nitrogen freezing. The results showed that: Soaking seed with 0.4% KNO3 for 12 minutes is the best treatment. After treatment, the seed germination potential was 34%, the germination rate reached 42%, the germination index was 9.88, and the vigor index reached 0.0130, the seed vigor was almost 4 times that of the control (P <0.05).