Causes and Countermeasures of abnormal Leaf Color of Wheat seedlings

After sowing and emergence, all kinds of abnormal heterochromatic seedlings are often formed due to the influence of natural conditions and cultivation measures. In order to facilitate seedling and symptomatic management, they are introduced as follows. Causes of yellowing of wheat leaves in yellow leaf seedlings.

First, the soil is dry. This kind of situation often occurs in the wheat field where the soil moisture is insufficient or the soil moisture is running away through ventilation. It is characterized by slow birth of tillers, gray-green leaves, short heart leaves, slow growth or stagnation (called by the masses as "shrinking seedlings"), yellow and dry leaves in the middle and lower parts, and few and thin roots. Key points of management: combined with watering, 15kg ammonium bicarbonate per mu.

The second is nitrogen deficiency. The seedlings were thin and erect, the tillers decreased, and the leaves were narrow and short. The lower leaf starts from the leaf tip, gradually turns yellow and dry, and develops to the upper leaf. Key points of management: urea 78kg per mu, or ammonium bicarbonate 20kg, or ammonium bicarbonate 20kg, or human feces 600kg 700kg, applied in ditches between rows or mixed with water.

Third, the soil is hard. Due to the lack of soil moisture and air, the root system is difficult to stretch, so the wheat leaves are yellow and short, and the tillers can not appear on time. Management points: first timely watering, and then deep ploughing and loosening soil, in order to break the rigid layer.