The invention discloses a method of increasing growth of lateral roots of
Malus hupehensis. The method of increasing growth of lateral roots of
Malus hupehensis includes the steps: after storing seeds of
Malus hupehensis in sand for one month, planting the seeds of
Malus hupehensis in a
nutrition pot; selecting 8-10 leaves and 60-days old and
insect-
disease-free seedlings of
Malus hupehensis, and taking the seedlings of
Malus hupehensis away from the
nutrition pot, rinsing the matrix by means of
clean water, and
transplanting the seedlings of Malus hupehensis to a
greenhouse;
transplanting the seedlings of Malus hupehensis to 1 / 2Hoagland water planting
nutrient solution for
seedling recovering for half a month, and exchanging the
nutrient solution once a week; and performing BR (
brassinosteroid)
processing, wherein the BR
processing concentration is 0.5mg / l, normally managing after one week of
processing, exchanging the
nutrient solution once a week, and cultivating for one month. For the method of increasing growth of lateral roots of Malus hupehensis, the BR processing increases the number of roots, the length of roots, the surface area of roots, the volume of roots, the height of plants, and the thickness of stems of the seedlings of Malus hupehensis. In a word, the RB processing is conductive to growth of lateral roots, and especially increases growth of fine roots. The method of increasing growth of lateral roots of Malus hupehensis can provide certain theoretical basis for growth of lateral roots of apple, and has important meaning for guiding practical production.