First, the basic introduction of broccoli

1. Broccoli, also known as broccoli, is a herb of 1-2 years old, native to the eastern coastal area of the Mediterranean. At present, it is cultivated in the north and south of China, and has become one of the main vegetables in daily life. Broccoli is rich in nutrients, including protein, sugar, fat, vitamins and carotene. Its nutritional components rank first among similar vegetables, and it is known as the "crown of vegetables".

2. A variety of Brassica plants in Cruciferae, whose products are green flower heads. Originated in Italy on the Mediterranean coast of Europe, it was introduced to China during Guangxu period.

3. The nutrients in broccoli are not only high in content, but also comprehensive, mainly including protein, carbohydrates, fats, minerals, vitamin C and carotene. According to the analysis, every 100g of fresh broccoli contains 3.5g-4.5g of protein, which is three times that of broccoli and four times that of tomato. In addition, the mineral composition of broccoli is more comprehensive than other vegetables, and the content of calcium, phosphorus, iron, potassium, zinc and manganese is very rich, which is much higher than that of cruciferous cabbage.

Second, the morphological characteristics of broccoli

1, shape

The morphological characteristics and growth habits of broccoli are basically similar to those of common cabbage (Brassica oleracea L.), which belongs to Brassica of Cruciferae and is a 1-2-year-old herb. Strong growth, strong heat resistance and cold resistance. This plant is very tall. According to the growth of different varieties of leaves, about 20 leaves are taken out, with clustered buds at the top. Close-knit flowers are spherical and hemispherical with turquoise buds, so they are called broccoli.

Step 2 leave

The color of leaves alternated between blue and green, gradually turned into dark blue and green, and the wax layer thickened. The petiole is long and narrow, and the leaf shape has two kinds: broad leaf and long leaf. The rhizome is thick, the epidermis is thin, the water content in the middle pith cavity is large, fresh and tender, and the root system is developed.

Third, the classification of broccoli

1, excellent

Early-maturing variety, with mushroom-shaped top protruding, dark green color, single bulb weighing 350 ~ 400g, compact bulb, thin bud, good commercialization and few side branches, is suitable for cultivation in early spring and autumn.

2. Future

Early maturing variety, erect variety, suitable for close planting, mushroom shape, dark green color, full shape, good commodity, suitable for autumn cultivation.

3. Scenery

Medium-mature variety, vigorous growth, large development, single ball weighing about 500 grams, semi-circular, compact flower ball, fine buds, blue-green, poor cold resistance, but strong stress resistance.

4. Urban Green Belt

Medium-mature variety, with a single ball weighing about 500 grams, flourishing leaves, good quality, semi-circular, and also used for main side flower balls. It is easy to be hollow when there is plenty of fertilizer and water, and it is easy to appear all over the sky when it is hot and rainy, and it is easy to turn purple when it is frosted.

5. Holy green

Mid-late maturity variety, vigorous growth, cold tolerance, single ball weighing about 500 grams, semi-circular, thin buds, dark green, not easy to hollow.