chong

Assuming that the remaining roots were live roots, they should help in limited nutrient intake for the plant. Yellowing of the leaves is normal because the plant is concentrating on developing new roots. If your plant is in the ground, it needs to be sheltered from sunlight. Heavy shade is best. And after the initial watering, withhold subsequent watering until the top 2" of the soil is dry. Misting around the area of the pseudo-stem would be helpful, too. After new leaf emerges, you can water normally.

If your plant is in a pot, you basically need to the same thing, i.e., keep it in a warm place with some air flow, in the shade, water only when top of the soil is dry.

Other than starting or transplanting solution added to your first watering, do not use any fertilizer until there are several leaves growing.