Growth characteristics of Direct seeding Brassica napus

The first is the depth of the main root: the root system of direct seeding rape is deep, the main root can reach 50 cm, and the lateral root and fine root are concentrated in the tillage layer of 20 cm, spreading horizontally to 40 cm. Second, the disease is relatively mild: because sowing and flowering are relatively late, to a certain extent, it can avoid the infection peak of Sclerotinia sclerotiorum and reduce the incidence. Third, the ontogeny is poor: because the whole growth period of direct seeding rape is short, the ontogeny time is short, and the productivity per plant is low. High yield should be obtained by reasonable close planting; fourth, weeds are easy to occur: direct seeding rape fields are extremely prone to weed damage. Chemical control of weeds is the key technology of sowing the whole seedling of direct seeding rape.