武夷科学

本实验研究了温度、土层深度及土壤湿度对加拿大一枝黄花种子发芽率与黑土、砂壤土、红壤土对其植株扦插成活率的影响。结果表明:(1)加拿大一枝黄花种子在25℃、位于土壤表面、土壤的相对含水量为35％的条件下,发芽率均达到最高,其值分别为45-48％、39-42％、36-40％。(2)加拿大一枝黄花扦插枝条的成活率:砂壤土>黑土>红壤土,其值依次为70％、50％、40％。加拿大一枝黄花(Solidago canadensis L．),隶属菊科(Compositae)一枝黄花属(Solidago),为多年生根茎植物。原产北美,20世纪30年代就以庭院花卉引入我国上海、南京一带,而后逸生野外造成严重危害。近年来,外来入侵物种对生物物种多样性的影响受到人们愈来愈多的关注。为了严防外来人侵植物加拿大一枝黄花进一步在中国扩散、传播、危害,开展了对其生物学特性的研究。

The article studied the effects of temperature, plant depth and soil humidity on the germination percentage and the effects of black soil, sandy soil and lateritic loam on cutting survival rates of Solidago canadensis . Results showed that (1) The optimumma for the seed germination were 25℃, on the soil surface and 35% soil humidity. Under these conditions, the germination percentage reached 45 -48% , 39 -42% , 36 -40% , respectively. (2) The highest survival rate of 5. canadensis cutting was found in sandy soil and the rate reached 70% . The cutting rates in black soil and lateritic loam followed and were 50% and 40% , respectively.