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刚从艾伯塔收的野燕麦(Avena fatua L.)种子全部处于休眠状态。在室温下保存33周以后其中的46％休眠被解除。赤霉酸对打破刚收的或经贮藏的种子的休眠很有效。一些化学药物,即硝酸钾、硝酸铵、硝酸钠、细胞激动素(苄腺嘌呤、激动素)和硫脲对刺激种子的萌发和出苗有不同程度的效果。在温度10—21℃时种子萌芽率及出苗率最高,虽然在10℃时比在较高温度下萌芽和出苗率要低一些。温度达32℃对正常的萌发和出苗有害。当土壤湿度保持在田间持水量的50％或75％时幼苗出土最多。在田间持水量湿度很大时幼苗不出土,且在种植后11天内全部种子腐烂。播深2—8厘米最利于幼苗出土。在播种深度较深的情况下,大粒种子比小粒种子和中等种子(按籽粒重量来分)出苗速度快、出苗率高。播深0.5—3、4—12及16—20厘米,出苗最多的时间分别为8、11—13及13—17天。对这些结果在野燕麦防除考虑中的某些实际意义也进行了讨论。
The seeds of Avena fatua L. that had just been taken from Alberta were all asleep. 46% of dormancy was released after 33 weeks of storage at room temperature. Gibberellic acid is very effective in breaking dormancy of freshly harvested or stored seeds. Some chemical drugs, namely, potassium nitrate, ammonium nitrate, sodium nitrate, cytokinin (benzyladenine, kinetin) and thiourea have different degrees of effect on the germination and emergence of stimulated seeds. Seed germination and emergence rates were highest at 10-21 ° C, although germination and emergence rates were lower at 10 ° C than at higher temperatures. Temperatures up to 32 ° C are harmful to normal germination and emergence. The seedlings were most unearthed when the soil moisture remained at 50% or 75% of the field capacity. Seedlings were not excavated when field moisture was high and all seeds were decayed within 11 days of planting. Sowing depth of 2-8 cm best for seedlings unearthed. In the case of deeper sowing depths, the emergence rate of large seeds is faster and the rate of emergence is higher than that of small seeds and medium seeds (divided by grain weight). Sowing 0.5-3,4-12 and 16-20 cm deep, the emergence of the most time were 8,11-13 and 13-17 days. Some of the practical implications of these results in wild oat control are also discussed.