Rape is commonly known as green vegetables, Chinese cabbage and Chinese cabbage. The rape referred to here is different from the rape cultivated as an oil crop. The former uses edible leaves and petioles as vegetables, while the latter uses oil rolled from edible seeds as oil crops.

There is a big difference in external morphology between rape and Chinese cabbage. The former has obvious petiole, while the latter has no obvious petiole, but leaves extend to both sides of the petiole to form obvious wings. The biggest difference between them is that when the rosette leaves grow to a certain number, the reappeared heart leaves begin to roll in, and finally the cabbage is formed. However, rape does not have curly leaves, but always grows in the state of rosette leaves. Although they are different in morphology, they are closely related and belong to subspecies and varieties of the same Brassica species. Therefore, the fertility rate of natural hybridization is 1%, and the hybrids produced can also grow and reproduce normally. Pay attention to strict isolation when collecting seeds, otherwise the hybrid offspring will mutate and lose the commodity value.

Rape, as a kind of vegetable with tender vegetative organs, is a kind of green leafy vegetable that people in the south like to eat. In recent years, northern Renye Fang has gradually become accustomed to it, especially in autumn and winter, when Chinese cabbage and radish are on the market in large quantities, it will be very pleasant to eat some green vegetables at intervals and adjust the dietary structure.

Rape belongs to shallow root system, which is distributed in the shallow soil layer and has strong regeneration ability, so it is suitable for seedling raising and transplanting.

The stem is short and the rosette leaves are densely planted on the stem disk. In the vegetative growth period, the leaves are differentiated by shortening the stems. When a certain period of low temperature is encountered during the growth period, the growing points differentiate the flower buds, and the flower stems are sprouted in a mild climate. Once the flower stems are formed, the leaves are aged and lose their edible value. But the young stems are edible.

The leaves of rape are both edible organs and assimilating organs. There are obvious petioles, and the leaf shapes are round, spoon-shaped, oval and oval, which vary according to different varieties. Leaf colors are light green, dark green and black green; Most leaves are smooth and shriveled, and a few have fuzz; Petiole is thick, flat, semicircular and diverse in shape. The number of leaves per plant is more than 1, and the edible leaves are about 7 ~ 8. The leaves of most varieties are stretched, or the petioles are folded in a waist shape, and a few heart leaves are folded in a hemispherical shape.