Question

Describe the effect of nutrient supply on root growth.

Answer 1

Phosphorus and potassium are the two main nutrients that support root growth in plants and they encourage plants to put down a dense collection of new roots and strengthen existing roots as they develop. Mineral nutrition is an important factor influencing the growth of plant roots.

Increasing nutrient supplies in the soil may decrease root length but increase root weight in a quadratic fashion.Roots with adequate nutrient supply usually have more root hairs than nutrient-deficient roots and this may result in greater uptake of water and nutrients by roots well supplied with essential plant nutrients, compared with roots grown in nutrient-deficient soils.

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