摘要
设置了６种恒温温度、４种变温温度、３种芽床处理、２种光暗水平对偃麦草属（Ｅｌｙｔｒｉｇｉａ．Ｄｅｓｖ．）４种牧草种子发芽的适宜条件进行了探讨。结果表明，４种牧草种子萌发的适宜温度（℃）分别为，毛偃麦草（Ｅ．ｔｒｉｃｈｐｐｈｏｒａ）：２０；１５～２５；１０～２０；长穗偃麦草（Ｅ．０ｅｌｏｎｇａｔａ）：２０；１０～２０；偃麦草（Ｅ．ｒｅｐｅｎｓ）：１５～２５；２０～３０；２０；中间偃麦草（Ｅ．ｉｎｔｅｒｍｄｅｉａ）：２０；１５～２５；２０～３０。在１５～２５℃和２０～３０℃变温处理下，胚根、胚芽生长健壮，使萌发种子的全株重量和简化活力指数极大提高。光暗条件不影响种子的发芽势，但光照显著促进偃麦草和中间偃麦草种子提高发芽率，而黑暗条件，对毛偃麦草和长穗偃麦草种子的发芽率有明显或显著促进效应。４种偃麦草种子的发芽率有明显或显著促进效应。４种偃麦草种子的发芽方式均以纸上法为最佳。
The optimum germination conditions for the four species of Elytrigia which were not listed in Rules For Grass Seed Testing of The People’s Republic of China (GB2930～82) or in International Seed Testing Rules(ISTA, 1985)were studied.It was showed that the optimum temperatures for E . trichpphora, E. elongata, E.repens and E. intermedia, in the order named, were 20, 15/25, 10/20℃; 20, 10/20℃, 15/25, 20/ 30, 20℃and 20, 15/25, 20/ 30℃. The latter two species had a relative requirement of light, whereas the formers was on the contrary.All of the species needed the top of paper(TP)as germination substrate.
基金
内蒙古自然科学基金
关键词
偃麦
草属
牧草
种子萌发
Elytrigia Desv .,seed germination
