What exactly is a Canadian goldenrod? Solidago canadensis blooms from June 65438+ 10 to June 165438+ 10 every year. Plants will grow 50 cm spikes in flowering period, which is very ornamental. As an exotic plant, too much will affect the survival of other plants. A flower in Canada has strong reproductive ability. After growing in an area, it will soon occupy most of the territory of the whole area.
When it is removed after flowering, it is easy to leave underground tubers. There are tubers underground, and soon a place will be covered with a Canadian flower. It is necessary to control its flooding by manual weeding at seedling stage, which brings difficulties to weeding work.
It seems that this plant is useless. In fact, its nectar is deeply loved by some insects. In order to obtain honey, it is impossible to completely control this plant. But if it is not controlled, it will threaten the growth of other plants. As far as management means are concerned, controlling population growth is the main purpose.
What is the harm of Solidago canadensis? In this regard, Li, a professor and doctoral supervisor at the School of Life Sciences of Henan Agricultural University, popularized science in Weibo video. There are three main hazards of Solidago canadensis. First, the growth is extremely dense, which encroaches on the growth space of local species; second, the substances secreted in the soil destroy the ecological balance; third, it can cross with plants such as Compositae to change genetic information.
Professor Li introduced that "Solidago canadensis" first appeared in the south of China and was kept at home by the citizens as a flower viewing or flower arrangement. However, after breeding in China for many years, the flower has appeared widely in Zhengzhou, Kaifeng, Xinxiang, Xinyang and other places, showing an explosive trend.
It is understood that it is on the list of the second batch of alien invasive species in China, because it is "tenacious, difficult to kill and harmful to the land", so it must be concentrated on encirclement and suppression.
According to the practice of Tianjianhu Park in Zhengzhou, sanitation workers first cut off the 2m-high yellow flowers from the roots with sickles, then dug out the roots with pickaxes, sent the stems and roots to the garbage sorting center for crushing, and then sent the garbage to the power plant for harmless treatment.
The original soil should be treated with herbicides, then carefully cleaned and planted with other environmentally friendly plants.
Encyclopedia data also show that Solidago canadensis is also known as "ecological killer" and "devil flower" among the people. A tree can bear more than 20 thousand seeds, and the survival rate is over 80%, which shows its harmfulness.
Source: Fast Technology