Indispensable fertilizer for rapeseed
Phosphorus deficiency: leaves slowly, small leaves, dark green. The lower old leaf stems and petioles were purple, and the root development slowed down. Poor resistance, not normal premature. The seeds are not full, the yield is reduced, and the oil yield is low.
Potassium deficiency: The plants are short. The initial leaves were dark green and the leaf margins began to curl downwards, even worse in hot and dry weather. Later, when the potassium deficiency is severe, a white-colored macula appears on the outer edge of the leaves, and the old leaves dry before maturity. The fruit is thin and the yield is reduced.
Magnesium deficiency: There are purple patches on the lower middle leaves, yellow-purple and green-purple spotted leaves.
Sulfur deficiency: The plants are short, the leaves are light green, and the back of the leaves turn red. The leaves are erect or curled, the growth period is late, and the flowers are small and small. The tip of the pods dry up and about half of the seeds are stunted.
Boron deficiency: Plants grow slowly and dwarf. The stem is thick and thick and the wood is damaged. When the boron deficiency was slight, blue-purple spots appeared between the veins, and purple patches developed to the edge of the old leaves. Abnormal buds and atrophied flowers appear. The top of the flowering, the flowering period is prolonged, the pods are less, not strong, commonly known as "flowers but not real" disease. Appropriate application of various fertilizers can increase the production of rapeseed.
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