Tell me about alfalfa flowers.

Alfalfa is also called purple alfalfa and alfalfa. Native to Asia Minor, Iran, Transcaucasia and Turkmen Plateau. China has cultivated 2000 varieties.

It has a history of many years and is widely distributed in the northwest, north China and northeast China. It is also planted in the Jianghuai Valley, making it the largest cultivated pasture in China.

(1) feature

Alfalfa is a perennial herb with a plant height of 100.

About 150cm

Stems are much branched. Trifidate compound leaves, leaflets ovoid or oval. A raceme with 20 small flowers.

~30

Flowers are purple. Pod spiral, containing seed 2.

~9

The seeds are kidney-shaped and yellow-brown. I like warm and semi-arid climate, and the average daily temperature is 15.

~20

0℃ is most suitable for growth, while high temperature and high humidity are unfavorable for its growth. The cold resistance is strong, and its cold-resistant varieties can tolerate -20.

~-30

At 20℃, it can withstand MINUS 40 degrees when covered with snow.

The taproot is stout and the root system is developed, reaching 3.

About 6 million

It can fully absorb water in deep soil, so it has strong drought resistance. Not strict with soil, sandy soil,

Clay can grow, but the most suitable soil layer is deep, rich in calcium, and the soil pH is suitable.

7 o'clock

~8

. Water accumulation is the most taboo in the growing period, and a large number of people will die if they are flooded continuously for 24 hours. Therefore, good drainage is required, and the groundwater level is lower than1m.

Below. Saline-alkali tolerance, salt tolerance less than 0.3%, in NaC 1.

When the content is below 0.2%, the growth is good.

(2) Cultivation techniques

Alfalfa seeds are small, so careful soil preparation is required before sowing to keep soil moisture. Appropriate amount of organic fertilizer or phosphate fertilizer should be applied as base fertilizer in poor soil. Sowing can be done all year round, and it can also be done in places with good soil moisture and less wind and sand damage in spring. Sowing can be done at the end of rainy season in areas with spring drought and late frost. 8 can be used in areas that are not too cold in winter.

End of the month to 9

Sowing in the middle of the month, sowing in autumn has good moisture content and less weed harm; You can also sow the seeds before the soil freezes in early winter, send the seeds over the winter, and germinate by using the water when the soil freezes in early spring. Generally, drilling holes are used, and the row spacing is 30.

About 40 cm

The sowing depth is 1.

About 2 cm

The sowing amount per mu is 1.

~ 1.5kg

. Seedlings grow slowly and are vulnerable to weeds, so weeds should be removed in time. Tillage before turning green in early spring or after mowing every time, and watering in dry season and after mowing have a very significant effect on improving grass yield. You can cut three trees every year.

~4

Second, the average yield of hay per mu is 600.

About 800 kilograms

, up to 1000kg.

Above. Usually 4.

0 ~ 5 kg fresh grass drying 1 kg

Hay. Hay drying should be mowed when 10% plants bloom, and the stubble height should be 5cm.

Suitable.

(3) Economic value

Alfalfa is known as the "king of pasture", which not only has high grass yield and excellent grass quality, but also is rich in crude protein vitamins and inorganic salts. Protein is rich in amino acids, which are essential for animals. The content of crude protein in dry matter is 15% ~ 25%, which is half of soybean cake and higher than corn 1.

~ 1.5

Time magazine. Good palatability, green feed, silage or dried hay. Feeding young alfalfa to pigs, poultry, rabbits and herbivorous fish is a supplementary feed for protein and vitamins. Alfalfa grass powder can be made into granular feed, and can also be made into complete compound feed for livestock, poultry, rabbits and fish. Generally, mixed sowing of Festuca arundinacea, Bromus inermis and alfalfa is used in grazing grassland, which can not only improve the feeding value of forage, but also prevent livestock from swelling caused by eating too much alfalfa. Alfalfa mixed with silage such as Sudan grass and green corn has a good feeding effect. Alfalfa has developed root system and is a good soil and water conservation plant. Nodules grow in roots, which can fix nitrogen in air and increase nitrogen in soil, so they are also good green manure plants. Alfalfa buds and alfalfa buds in early spring can also be eaten by people.

Flower language: hope