Figure 1

Effects of different levels of N forms and K supply on the plant growth in wheat seedlings. Wheat plants were supplied with ammonia (AN) and nitrate (NN) at 2 and 10 mmol L⁻¹ and three different concentrations of potassium (K) solution (0.5, 5, 15 mmol L⁻¹ K [K0.5, K5, K15]).