黑麦草种子萌发特性研究

Study on Germination Characteristics of Ryegrass seeds

为了探寻黑麦草(Loliurn perenne L.)种子萌发的动态吸水规律与发芽特性,以黑麦草“金石”种子为材料进行了吸水和发芽试验,并对吸水特性和发芽特性进行相关性分析。结果表明,黑麦草种子的动态吸水呈现“快慢快”的规律,吸水36h黑麦草种子的吸水量趋于饱和状态,吸水量达到2.225g,达到干种子质量的1.7倍;黑麦草种子第8天开始进入快速发芽阶段,第14天发芽率高达93%;黑麦草种子动态吸水量、发芽率随时间的回归方程均为三次函数,相关性达到极显著水平(P<0.01)。相关性分析表明,15~36h吸水量与种子发芽指数和活力指数呈显著正相关(P<0.05),且随着时间的推移,这种相关性越大;其他的发芽指标与种子的吸水量并不存在显著相关性;种子的吸水率与发芽特性也不存在显著相关性。该结论可为黑麦草种子的质量检测和黑麦草播种建植提供科学依据和技术指标。

The dynamic water absorption law and germination characteristics of ryegrass (Loliurn perenne L.) seeds are studied. Water absorption and germination experiments are carried out by using ryegrass “Jinshi” seeds as materials,and the correlation between water absorption and germination characteristics is analyzed. The results show that the dynamic water absorption of ryegrass seeds presents the rule of “fast-slow-fast”. The water absorption of ryegrass seeds tends to be saturated after 36 hours of water absorption,and the water absorption reaches 2. 225g,which is 1. 7 times of the dry seeds. The seeds of ryegrass began to germinate rapidly on the 8th day,and the germination rate reaches 93 % on the 14th day. The regression equation of dynamic water absorption and germination rate of ryegrass seeds with time is a cubic function,and the correlation reaches a very significant level (P<0. 01). The correlation analysis shows that the water absorption at 15?36h is positively correlated with seed germination index and vigor index (P <0. 05).and the greater the correlation is with the passage of time. Other germination indexes have no significant correlation with seed water absorption;and the water absorption ratio of seeds has no significant correlation with germination characteristics. These conclusions provide scientific proof and technical indicators for the quality detection of ryegrass seeds and turf establishment.