The invention relates to a culture method for
plant seedlings. The
plant seedlings are cultured by a ventilated root division culture device, the side surfaces of two culture bowls of the device are in
butt joint, a cover plate and a culture plate are arranged on the two culture bowls, culture holes are formed in the culture plate, and vent holes are formed in the two sides of the culture holes. The culture method comprises the followings steps: the
plant seedlings of 3 days are taken and cultured in a Hoagland's
nutrient solution with the concentration of 50 percent for 2 days then in a Hoagland's
nutrient solution with the concentration of 100 percent for 12 days, the plant seedlings growing consistently are taken, the stems of the plant seedlings are wrapped by
nutrient cotton and fixed in the culture holes of the culture plate, the roots of the plant seedlings are divided into a group A and a group B, the group A is put into the culture bowl containing the Hoagland's
nutrient solution, and the group B is put into the culture bowl containing a
nutritional deficiency nutrient solution; the pH values of the nutrient solutions are regulated to 6 at 8 o'
clock in the
morning and 15 o'
clock in the afternoon; the nutrient solutions are changed every other three days; and after 4-12 days, the plant seedlings are taken out. The operation is simple, and the personal errors are reduced, so that the
research result is more accurate, the culture time is saved, and the working efficiency is improved.