They are both a kind of vegetable, but they are called differently. Cabbage is also called cabbage, cabbage and kohlrabi. Cabbage is named after it can be used as indigo dye. In addition, although cabbage is a vegetable, it is also called broccoli because its leaves are blue-green.
Its plant type is short and strong, the outer layer color is generally green or grayish green, the basal leaves are thick, and the layers are wrapped into spheroids, the shape is oblate, and the bulbs are generally milky white or light green, with a diameter of about 10-30 cm.
High-quality cabbage is compact in structure, rich in water, heavy in hand and good in taste, while inferior cabbage lacks water, light in hand and poor in taste. High-quality purple cabbage is bright and shiny; Inferior purple cabbage is dull and dull.
Cabbage is not strict with soil, and it can be cultivated in sandy loam, loam and clay. There is no strict requirement for soil acidity and alkalinity, and the adaptability is relatively wide.
The history of cabbage:
Cabbage originated from the Mediterranean to the northwest coast, and the results of the identification of cabbage genotypes by researchers show that they are most likely from a wild weed or a composite hybrid of wild related species.
Indirect evidence is that the four related wild species complexes * * * grow on the cliffs along the Mediterranean coast, and there is no species gap in the biological world: geographical isolation and reproductive isolation.
According to scholars' research on historical documents, as early as 4,000 to 4,500 years ago, the ancestors of ancient Rome and ancient Greece, European civilized countries, began to cultivate the ancestors of cabbage. At that time, some varieties of cabbage had not yet discovered their ornamental value, and Brassica napus continued its most essential and ancient use-being cooked into delicious food.
In today's Europe, there are still large areas of wild cabbage growing on the rocky wasteland exposed by the barren and cold Cretaceous sedimentary strata.