Speaking of yellow flowers, in the eyes of mainland people, they will think of yellow cauliflower, which is rich in nutrition and has won praise from people all over the mainland. However, when it comes to Canada, the yellow flower talks about the tiger's color change. Why is the same yellow flower so different?
Goldenrod canadiensis is a perennial herbaceous plant with a long rhizome. The stem is erect and up to 2.5 m tall. The leaves are lanceolate or linear-lanceolate, 5–12 cm in size, and the cephalic inflorescences are small. Mainly distributed in the United States, Canada, central Mexico, Gulf of Mexico, northeast Mexico and other places, and later introduced into Altai, Austria, Belarus, China and other places, although it is cultivated for ornamentation, but the harm outweighs the benefits, so it has become an "ecological killer" and has been eradicated by people everywhere.
What are the reasons why the introduced Canadian goldenrod has become an "ecological killer"?
Although the Canadian goldenrod was first introduced as a garden flower because of its beautiful appearance, it was later found to do more harm than good, so it had to be eradicated. The reasons are:
(1) A Canadian goldenrod plant is up to 2.5 meters high, if it grows in fruit trees, vegetables, rice fields and other places, it will block the sun, resulting in poor light transmission between plants, it is easy to cause growth, more diseases, or flower and fruit drops, light causes yield reduction, heavy cause land destruction, etc.
(2) Canadian goldenrod rhizome is developed, spread through seeds, and can also be asexually reproduced by rhizomes, which can penetrate deep into the soil layer, destroy fruit trees, vegetable root growth, and cause the destruction of fruit trees or vegetables.
(3) Because of its tenacious rhizome, if it grows in a large area in fruit trees, vegetables, rice fields and other places, it not only competes for the light of the upper layer, but also competes for the nutrients of the lower soil, resulting in malnutrition of fruit trees, vegetables, and rice fields, which is easy to cause yield reduction.
(4) Canadian flowers are particularly fertile, a Canadian goldenrod can produce more than 20,000 seeds, the seed particles are also extremely small, and with crown hairs, can float with the wind, can also be attached to people and animals, floating far away. It can also be asexually reproduced by the rhizome, so if it is not eradicated in time, it is likely to cause large-scale crop destruction. At the same time, it has also led to a significant reduction in local biodiversity. According to the Shanghai Agricultural Technology Extension Center, more than 30 species native to Shanghai have become extinct due to the invasion of the Canadian goldenrod.
However, when it was eradicated, it was found that if the seeds were not eradicated in time before they were set, it was likely to cause large-scale spread of seeds, and because of the strong fecundity, the eradication pressure was increased, which was time-consuming and labor-intensive, and brought a lot of pressure to the local finances. As Wu Aimin, deputy director of the village committee of a town in Huzhou City, said: "Every time villagers are organized to concentrate on eradication, the expenditure requires more than 80,000 labor costs."
Later, because of the solution to the shortage of rabbit agricultural feed in a certain place, some people suggested to feed with local Canadian goldenrod, after theory and practice, it was concluded that Canadian goldenrod can be used as rabbit feed, with high nutritional value, and rabbits also like to eat. Similarly, because rabbits have one stomach and cows and sheep have four stomachs, they have stronger digestion than rabbits, so they are also suitable for cattle and sheep. Just as we see that some people use it to feed lake sheep, it becomes another choice of sheep feed.
So will the "ecological killer" Canadian goldenrod become the "fragrant fruit" of the feed industry?
I think it will, because there are the following aspects:
1. Canadian goldenrod has tenacious vitality, strong rhizomes, and developed seeds, whether through seed dispersal or asexual reproduction of rhizomes, can survive. Therefore, it is suitable for all parts of the mainland, whether it is saline-alkali land, acidic, alkaline, sandy loam soil or loam soil can survive. Especially in the northwest of the mainland, Inner Mongolia and other places, if they grow in a large area, they will also make great contributions to solving the local feed problem.
2. Although the Canadian flower likes water and sunny environments, it is also shade-tolerant and barren, so it can survive in farmland, wasteland, highways, and railways. Therefore, like those barren Gobi Deserts and wastelands in the northwest, if they survive in a large area, they can not only prevent wind and fix sand, but also provide fodder for cattle and sheep, killing two birds with one stone.
3. Canadian goldenrod has a cooling and detoxifying effect, and the nutritional value is also high, and the crude protein content is close to legumes in the early growth stage, and long-term feeding not only ensures the nutritional needs of livestock, but also reduces the economic burden of farmers.
4. In the past, the eradication of Canadian goldenrod was time-consuming and laborious, which brought a lot of economic pressure to the local area. But if it is used as feed and reused, it will be a good choice, and it is also another kind of belonging to it.
In short, as we often say: "There is no garbage in the world, just misplaced resources"! In the past, crayfish was like this, I believe that the Canadian goldenrod will also become a "fragrant glutton" in the feed industry with its tenacious vitality, transmission and nutritional value! #Will the Canadian Goldenrod be the next crayfish#