1. Effects of a combination of potassium deficiency and salt stress
on the growth of maize. 1: K-present Hoa gland’s nutrient solution; 2: K present
Hoa gland’s nutrient solution + 40 mmol L−1 NaCl; 3: K-present Hoa gland’s
nutrient solution + 80 mmol L−1 NaCl; 4: K-present Hoa gland’s nutrient solution
+ 120 mmol L−1 NaCl; 5: K-deficient Hoa gland’s nutrient solution; 6: K-deficient
Hoa gland’s nutrient solution + 40 mmol L−1 NaCl; 7: K-deficient Hoa gland’s
nutrient solution + 80 mmol L−1 NaCl; and 8: K-deficient Hoa gland’s nutrient solution
+ 120 mmol L−1 NaCl. Treatments with different letters indicate significantly
different values (p < 0.05). Values represent means ± SE, n = 20.