What are the varieties and types of knotweed?

Knotweed is mainly used as turfgrass, so the cultivars bred are all turfgrass types. Since 1951 in Maryland, USA.

Since the Agricultural Research Institute bred the Meyer knotweed variety, more than 30 varieties have been bred around the world, including Midwest, Z-27, Cashmere, FLR-800, FLR-900, F2-26, Belair, Zenifh, Emerald, SK-9000, SR-9100, Sumrise, Brand, Elforo, FJM-21, and Mafrella. Since 1990, China has also selected and bred Qingdao knotweed, orchid introduction knotweed, and Liaodong.

knotweed species; South Korea has also bred the S-94 knotweed variety. In terms of breeding goals, it is mainly required to have excellent traits such as longer green period, finer texture, more cold tolerance, drought tolerance, and more trampling resistance. Genetic resources in breeding.

Mainly from China, Japan, North Korea and other Asian countries.

In terms of breeding methods, traditional breeding, hybridization and reincarnation selection are mainly adopted. For example, the Meyer variety was bred using materials imported from North Korea using a single-plant selection method; Z-27 was further bred by single plant selection using the Meyer variety; The emarald variety is made from Knotweed (Knotweed with fine leaves.

Cultivated by intraspecific crossbreeding. Some biotechnology such as tissue culture, protoplast culture, transgenic technology.

It has also been used in the breeding of knotweed.

It is a perennial warm-season turfgrass of the Poaceae family. The main characteristics of Chinese knotweed are cold and heat resistance, strong drought resistance, trampling resistance, one of the high-quality lawn seeds in courts, parks, communities, river greening, and mountain greening. The growth environment requirements of Chinese knotweed are general, there is water and soil to germinate and take root, and the pests and diseases are almost negligible, especially few, which is a very small harm.

In the northern region, the Chinese knotweed begins to germinate and turn green in March and April, and turns yellow in September and October in winter, and begins to prepare for wintering. In the north, cool-season lawns such as early-maturing grass, ryegrass, and tall fescue are generally mixed and planted to achieve the effect of evergreen in all seasons.

Introduction of Japanese knotweed:

Japanese knotweed mostly grows on hillsides, plains, or seaside meadows. Prefer warm and humid climates. It has many advantages of resistance to barrenness, trampling, drought, pests and diseases, and also has a certain resistance to negativity and moisture.

Main uses:

Japanese knotweed has a well-developed root system and can take deep roots in the soil. The leaves are dense, smooth and resistant to trampling and are excellent for sporting turf grass. It is also a good soil and water conservation plant. At the same time, its stems and leaves are rich in nutrients, and it is also a very good grass for animal husbandry.

1.Sowing time and germination method

The sowing time of Japanese knotweed is generally chosen to be sown after the rainy season, and the seeds should be soaked in sodium chloride solution for a day and night before sowing, and then washed with water and then dried to sow seeds. Generally, it can germinate in about 2 weeks.

2.Soil requirements

Before sowing Japanese knotweed, the land should be ploughed, leveled, removed from excess weeds and gravel, and then applied enough base fertilizer to provide enough nutrients for the growth of Japanese knotweed.

3.Pest control

During the seedling period, we must pay attention to the control of diseases and insects, the most common are rust, leaf blight, and mole crickets. If found, scientific prevention and control methods must be adopted.

Japanese knotweed (scientific name: Zoysia japonica steud.).) is native to southeastern Asia.

Perennial warm-season herbaceous plants are wild species in the vast areas of China from the Liaodong Peninsula in the northeast, Hainan Island in the south, and Guanzhong in Shaanxi Province in the west, among which the Jiaodong Peninsula and the Liaodong Peninsula are more distributed. At present, it is one of the very few turfgrass seeds in China that does not rely on imports and can be exported. It grows mostly on hillsides, plains and coastal grasslands, and has not yet been cultivated by artificial introduction.

The distribution area is mainly in the warm zone of North Korea and Japan and some areas of China. It grows at altitudes between 200 and 500 meters above sea level.

Introduction of knotweed:

Knotweed is a plant of the genus Knotweed in the family Poaceae. It is distributed in North Korea, Japan and China's Hebei, Anhui, Jiangsu, Zhejiang, Fujian, Shandong, Northeast, Taiwan and other places, growing at an altitude of 200 to 500 meters, mostly on mountain slopes, plains and coastal grasslands.

Knotweed is adaptable, likes warm climates, and likes sunlight. Resistant to high temperatures, drought, shade. Taking advantage of its branches, it is easy to form a single community and pure grass layer.

It is barren and thin, resistant to trampling, and has a certain toughness and elasticity. In addition to the lush growth in spring and autumn, it can maintain a beautiful green grass layer in the hot summer, and dormant in the winter.

Knotweed is a warm-season, perennial, low, turf-type herbaceous plant with well-developed rhizomes and stolons elongated close to the ground. It is widely distributed in our country. Knotweed is a lawn plant with Chinese characteristics, and the current use of knotweed in China is mainly sown from the grass seeds collected from wild knotweed.

As a lawn species, knotweed is a rare export grass species in China, which is mainly produced in Shandong, Liaoning and other provinces.

Knotweed has good trampling resistance, drought tolerance, and is relatively barren and thin. In Beijing, Shenyang and other places, football fields and golf courses built with knotweed have better elasticity, trampling resistance, stress resistance, and extensive management resistanceIt is worth further systematic research in order to select and breed new varieties suitable for China's natural conditions as soon as possible. At present, some commercial varieties have also been introduced from abroad, such as Meier, Sunshine Z-73, Yade, etc.

Knotweed, also known as: Knotweed, Awl Grass, Yandi Green, etc., Latin name: Zøysia japonica Stud

Poaceae and knotweed are perennial herbs. It has a transverse rhizome and a fibrous root that is weak. The stalk is erect, 15-20 cm high, and there are often withered leaf sheaths at the base.

It is distributed in North Korea, Japan and China's Hebei, Anhui, Jiangsu, Zhejiang, Fujian, Shandong, Northeast, Taiwan and other places, growing at an altitude of 200 to 500 meters, mostly on mountain slopes, plains and coastal grasslands.

There are "Manila No. 1", "Manila No. 2", and "Taiwan Grass". Knotweed (Zoysiajaponicasteud.)), also known as knotweed, awl grass, Yandi green, etc.

Poaceae and knotweed are perennial herbs. It has a transverse rhizome and a fibrous root that is weak. It is 14-20 cm high, and there are often withered leaf sheaths at the base.

Born on plains, hillsides or coastal meadows, at altitudes between 200 and 500 meters above sea level.

Knotweed grows on plains, hillsides, or seaside meadows. Knotweed prefers warm and humid climates in rock formations, and its growth is most favourable in offshore areas affected by the oceanic erosion climate. Light-loving, it grows strong in well-ventilated open fields, but has a certain tolerance to negativity.

Drought resistance, jujube resistance to saline-alkali, strong resistance to diseases and pests, barren resistance, trampling resistance, and certain water moisture resistance.

Which of the following grasses does the genus Knotweed include? (Waste).

a.Cut the stock and take the shares.

b.The sky is quietly goose down.

c.Miscanthus. d.Broom grass.

Correct answer: B

Advantages of knotweed:

1.Heat-resistant

As a warm-season lawn, the heat of knotweed is undoubtedly excellent, and it can still grow well in a high temperature environment of about 35 degrees Celsius.

2.Drought tolerant

Knotweed is very drought tolerant, and even if there is no rain for a month or two in areas with little rainfall, it can still recover very quickly after watering.

3.Resistant to trampling and pruning

Its stolons are very developed, very resistant to trampling, and the protective effect on the ground cover is also very good; Moreover, it has fast tillering speed and strong regeneration ability, and can also recover quickly after pruning.

4.Shade tolerant

The shade tolerance of knotweed is also very good, which is relatively rare in the warm-season lawn, which makes the application range of knotweed attack grass more extensive.

The lawns we usually see are made up of different kinds of turfgrass, and in most cases, when buying turf, we still have to consider the overall advantages of hail. After all, turf is used outdoors, and it may often be "destroyed", and if it cannot ensure a relatively strong durability, it may not be paved for a long time, and it will need to be replaced immediately. Many people are very recognizant of knotweed, especially in some sports fields, we can also see this kind of lawn, its advantages are very obvious, if you want to buy a lawn is also a good choice.

Advantage 1: Stronger adaptability. After all, every place used in the grass is a loss of grass, to ensure that the turfgrass can adapt to the local environment. However, if it is really a high environmental requirement, such a lawn is basically difficult to maintain, and even has to be replaced every once in a while, which is not cost-effective for businesses.

However, this is not the case with knotweed, which is very common in coastal areas such as Asia and Africa, and is also one of the more recognized types of warm-season lawns. Its adaptability is very strong, whether it is in high temperature, arid areas, or in some harsh environments, knotweed can adapt well, such a lawn is of course the best choice. Advantage 2: High durability.

There are still many uses of lawns, and we may be more common to maintain water and soil, plus some greening effects, and can also be matched with other greening plants, and the effect will be more satisfactory to us. In addition to being used as a background color for greening, knotweed can also be used as a lawn for activity venues or lawn lights for football fields. Its leaf quality is relatively hard, and it is known for its wear-resistant, step-resistant, and very good elasticity.

It is very practical anywhere and can be maintained in a good condition for a long time. Many parks use knotweed in crowded areas, so that they don't have to be tended as often and can keep the lawn green.

Japanese knotweed has an extremely developed rhizome, is a deep-rooted plant, fibrous roots can penetrate more than 30 cm into the soil layer, can fully absorb water, therefore, knotweed has a strong drought resistance. Strong cold resistance. Not only is it resistant to high temperatures, but it can also safely overwinter in extreme low-temperature -33 conditions.

Strong resistance to salt and alkali. Knotweed is not very demanding on the soil and can grow in slightly alkaline soils. Good abrasion resistance, trampling resistance and good elasticity.

The leaves of knotweed grass have a certain degree of flexibility, are extremely resistant to trampling, and are suitable for planting in open green spaces and garden squares. It is easy to form a single contiguous lawn with a flat and beautiful lawn and strong weed resistance. Due to the developed rhizomes, rough and hard leaves, so wear-resistant, trampling-resistant, and strong resistance to diseases and pests, but not shade-tolerant, stolons grow slowly, and the spreading ability is worse than that of general lawn rentals.

As a result, once a lawn has bald spots, it will recover more slowly.

Shear-strand shear: representative grass species include weak shear-flawed grass, fluffy shear-shear, creeping shear-shearing and small bran grass, etc., this kind of grass has stolons or rhizomes, spreads rapidly, has good turf formation performance, is resistant to trampling, the grass is delicate and dense, the leaf quantity is large, and it is suitable for weakly acidic and moist soil. It can be built into high-quality lawns, such as golf courses, hockey rinks and other sports field lawns and fine ornamental lawns.

Fescue genus: The representative species are tough leaf purple fescue, creeping purple fescue, fescue, fine leaf fescue and tall fescue. The common feature is that it is extremely resistant to stress, and has a strong resistance to acids, alkalis, barren fingers, arid soils, cold, hot climates and air pollution.

Tough-leaved purple fescue, creeping purple fescue, fescue, and fine-leaved grassgrass are all low-rise types with fine leaves. Tall fescue is a tall broad-leaved type. Fescue turfgrass is mainly used as a companion species in the mixed sowing of sports finch lawn and various green lawns.

The Chinese knotweed grass has the advantages of anti-trampling, good elasticity, strong regeneration, few pests and diseases, easy maintenance and management, and long life, and has been widely used in football fields, golf courses, bicycle racing tracks, baseball fields and other sports venues all over China.