摘要
1985～1988年在沈阳农业大学进行了豚草(Ambrosia artemisiifolia L.)和三裂叶豚草(Ambrosiatrifida L.)物候期的观测,二种豚草生育期均170天左右,豚草略短些。但出苗至开花期豚草比三裂叶豚草长,分别为119天和110天;开花到果熟期豚草比三裂叶豚草短,分别为50天和64天。全生育期有效积温二者均在1400℃上下,豚草略低些。但出苗到开花期豚草高于三裂叶豚草,分别为7445℃和6726℃;开花到果熟期豚草低于三裂叶豚草,分别为8776℃和10745℃。二种豚草出苗最低温度5℃,最适温度10～12℃,最高温度21℃左右,三裂叶豚草略低。
The phenology of common ragweed (Ambrosia artemisiifolia L.) and great ragweed (A. trifida L.) was investigated on the campus of Shen- yang Agricultural University in 1985--1988. The growth period lasts about 170 days in great ragwad and slishtly shorter in common regweed. However, the period from emegence to the beginning of blosson is longer in common ragweed than in great ragweed, being 119 days for the former, and 110 days for the latter. On the other hand, the period from the beg- inning of blossom to seed maturation is shorter in common ragweed than inr great ragweed They are 50, 64 days respectively. The effective temperature summation throughout the growth period is about 1400℃ for both, it is slightly lower for common ragweed. However in the period from emergence to the beginning of blossom, that temperature is higher for common ragweed than for great ragweed, being 744. 5℃ and 672. 6℃ respectively. On the contrary in the period from the beginning of blossom to seed maturation, that temperature is lower for commom ragweed than for great ragweed. They are 877.8℃, 1074. 5℃ respectively. The germination temperature for both ragweeds is as follows: minimum 5C, optimum 10--12℃ maximum 21℃. They ary slightly lower for great ragweed.
出处
《沈阳农业大学学报》
CAS
CSCD
1989年第5期344-350,共7页
Journal of Shenyang Agricultural University
关键词
豚草
三叶裂豚草
物候期
common ragweed
great ragweed
phenology
