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在通辽地区,对不同采种时期通草1号虉草(Phalaris arundinacea L.cv.Tongcao No.1)种子的生活力,进行了行距与施氮量影响的研究,旨在揭示虉草生活力对行距和氮肥的响应规律,为虉草种子生产提供理论依据。结果表明,虉草种子发芽势、发芽率、发芽指数和幼苗胚芽长、胚芽鲜质量和活力指数等都随行距和施氮量增加而增长。在适宜采种期(6月30日),施氮量92 kg/hm2处理下,虉草种子发芽指数和幼苗活力指数显著高于不施氮处理(p<0.01)。在施氮条件下,在行距70 cm处理下,虉草种子发芽指数和幼苗活力指数都显著高于行距30cm(p<0.01),而在行距50 cm和70 cm处理下,虉草种子和幼苗的上述指标差异不显著。采种时期对虉草种子生活力影响明显,盛花后13~15 d采集的种子生活力较高,提前或推迟采种都使虉草种子生活力下降。
In Tongliao area, the effects of row spacing and nitrogen application rate on the viability of seeds of Phalaris arundinacea L.cv.Tongcao No.1 in different harvesting periods were studied, And the response of nitrogen fertilizer, provide the theoretical basis for the seed production of hay. The results showed that germination potential, germination rate, germination index, seedling germ length, fresh germ quality and vigor index increased with the increase of seed spacing and nitrogen application rate. Under proper seeding period (June 30th), N application rate was 92 kg / hm2, seed germination index and seedling vigor index were significantly higher than those without nitrogen application (p <0.01). Under nitrogen application, the seed germination index and seedling vigor index were significantly higher than those with row spacing of 30 cm (P <0.01) at the row spacing of 70 cm. However, under the treatments of 50 cm and 70 cm, The above indicators did not differ significantly. The seed vigor significantly affected the seed vigor of seedlings, the vigor of seed collected from 13 to 15 d after blooming was higher, and the seed vigor of seed was decreased in advance or postponed.