How to remedy nitrogen deficiency in greenhouse strawberries? Practical methods shared
Generally, when nitrogen deficiency begins, the leaves during the vigorous growth period gradually change from green to light green. As the nitrogen deficiency worsens, the leaves turn yellow, with localized scorching, and are slightly smaller than normal leaves. As the degree of nitrogen deficiency intensifies in young leaves, the leaves become even greener. The petioles and calyxes of old leaves appear slightly red, and the leaf color is paler or shows a jagged bright red...
Generally, when nitrogen deficiency begins, the leaves during the vigorous growth period gradually change from green to light green. As the nitrogen deficiency worsens, the leaves turn yellow, with localized scorching, and are slightly smaller than normal leaves.
As the degree of nitrogen deficiency intensifies in young leaves, the leaves become even greener. The petioles and calyxes of old leaves appear slightly red, and the leaf color is paler or shows a jagged bright red. Poor soil without proper fertilization, extensive management, and overgrown weeds make nitrogen deficiency more likely.
Prevention and control methods: Apply sufficient base fertilizer to meet the characteristics of the short but concentrated growth period in spring. If nitrogen deficiency is found, apply 11.5 kg of ammonium nitrate or 8.5 kg of urea per mu as a top dressing, and irrigate immediately after application. During the flowering period, a foliar fertilizer of 0.3%-0.5% urea solution can also be sprayed 1-2 times, with 50 kg of fertilizer solution per mu, or a 0.2% potassium dihydrogen phosphate solution 2-3 times.