摘要
加拿大一枝黄花(Solidagocanadensis)在3月中、下旬,日平均气温在10.5℃左右,最高气温在20℃左右为草籽出苗起始阶段。4月上旬到5月中旬末,日平均气温在18℃左右,最高气温在30℃左右,为最佳出苗期。极端气温低于8℃,高于35℃,基本不出苗,处于休眠期。自然条件下近地表草籽出苗率最高,土下超过2cm的草籽一般不出苗。砂培法试验结果表明,含水量过低或过高对草籽的发芽率都不利,含水量在25%左右其发芽率最高,达48.67%。
Solidago canadensis is a species of perennial weed of composite family. The initial stage of the seedling emerged in mid-march about 10.5 ℃of the day temperature on average ,and 20℃of the highest day temperature. The period of germination was the most good time about 18℃of the day temperature on average and at 30℃of the highest day temperature in fore-april to end of mid-may. But it didn't emerged basically that the excreme temperature was below 8℃and over 35℃,and the seed was in a rest period. The test result showed the rate of emergence was the highest for seed of Solidago canadensis at nearly earth's surface and with containing water of soil about 25%in the nature.
出处
《上海交通大学学报（农业科学版）》
2004年第2期192-195,共4页
Journal of Shanghai Jiaotong University(Agricultural Science)
基金
上海市青浦区科委发展基金资助项目(02-19)
关键词
加拿大一枝黄花
生物学特性
杂草
发生规律
Solidago canadensis
germination emergence
cultivated in a pot sand-cultture
