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Water hyacinth, commonly known as water hyacinth, scientifically called water hyacinth, is native to Brazil. In the 1950s, my country introduced water hyacinth from South America as pig feed and is now widely distributed in the Yangtze River and Yellow River in China. basin and provinces in South China. Water hyacinth is the fastest growing and reproducing aquatic plant in the world. The growth area of ??one water hyacinth can double in 6 days and can multiply into a population of 600,000 plants in 8 months. As an exotic species, water hyacinth has no natural enemies in our country, which makes it even more capable of growing wildly without restriction. According to statistics, water hyacinth is now rampant in 18 provinces and cities across the country, including Zhejiang. Famous water bodies such as Dianchi Lake, Taihu Lake, Huangpu River and Wuhan East Lake have all seen overflowing water hyacinth. Relevant parties have spent huge sums of money but cannot cure it. . Therefore, water hyacinth is also listed as "one of the top ten harmful weeds in the world".

Water chestnut is a plant of the Rhytrope family, Rhombaceae, native to warm areas of Europe and Asia, but has only been domesticated and cultivated in China and India. In southern China, it is especially cultivated in the Taihu region of the lower reaches of the Yangtze River and the Pearl River Delta, with the largest number being cultivated in Honghu, Hubei. The skin of water chestnut is crispy and the meat is delicious. It can be eaten after steaming and peeling, or it can also be eaten as porridge. Water chestnuts are rich in protein, unsaturated fatty acids and a variety of vitamins and trace elements. It has the effects of diuresis, lactation, quenching thirst, and detoxification.

Water hyacinth:

Eichhornia crassipes (Mart.) Solms is a floating herb. The fibrous roots are well developed, brown and black. The stems are very short and the stolons are light green. The leaves are clustered at the base and arranged in a rosette shape; the leaves are round and the surface is dark green; the petioles vary in length and contain many air cells composed of polygonal columnar cells. Vascular bundles are scattered among them, ranging from yellow-green to green; the base of the petiole has a sheath-like yellow Green bracts; scapes multi-ridged; spikes usually have 9-12 flowers; petals are purple-blue, corolla is slightly symmetrical on both sides, lavender around, blue in the middle, and there is a yellow round spot in the blue center , the base of the tepals merges to form a tube; the stamens are attached to the tepal tube; there are glandular hairs on the filaments; ? Anthers are blue-gray; pollen grains are yellow; the ovary is pear-shaped; the style is about 2 cm long; the stigma is densely covered with glandular hairs . ? Capsule ovate. The flowering period is from July to October and the fruiting period is from August to November.

Originally from Brazil. It is now widely distributed in the Yangtze River and Yellow River basins of China and various provinces in South China. It likes a warm, humid and sunny environment, has strong adaptability, and has a certain degree of cold tolerance. It grows in ponds, ditches and rice fields at an altitude of 200-1500 meters. It has also grown widely in Asia and the tropics. In areas suitable for growth, water hyacinth often blocks waterways and affects traffic due to excessive reproduction. Water hyacinth was once introduced to many countries and is widely distributed around the world. It is also listed as one of the top 100 invasive alien species in the world.

Water chestnut:

Trapa bicornis, also known as waist water chestnut, water chestnut, water chestnut, and water chestnut, is the fruit of the annual herbaceous aquatic plant water chestnut. Water chestnuts are sweet, mild and non-toxic, with crispy skin and delicious meat. They can be eaten after being steamed and peeled, or can be eaten as porridge. "Compendium of Materia Medica" records: "Water chestnut can nourish the spleen and stomach, strengthen the thighs and knees, strengthen the body and replenish qi. Water chestnut powder porridge is beneficial to the gastrointestinal tract and can relieve internal heat. It is beneficial for the elderly to eat it regularly." The ancients believed that eating more water chestnut can nourish the five internal organs and eliminate all diseases. , and can lighten the body. The so-called lightening of the body means that it has the effect of weight loss and bodybuilding, because water chestnut does not contain fat that makes people fat. Water chestnut is rich in protein, unsaturated fatty acids, a variety of vitamins and trace elements. It has diuretic, breast-clearing, thirst-quenching, and anti-alcoholic effects. Water chestnut is native to Europe and is most cultivated in the Taihu region of the lower reaches of the Yangtze River and the Pearl River Delta in China.