What happens when sunflowers lack nutrients during cultivation?
What happens when sunflowers lack nutrients? Here is a detailed introduction. Sunflowers show the following symptoms when lacking nutrients for reference: with nitrogen deficiency, growth is slow at the seedling stage, the plant is slender and weak, the leaves are small and thin, showing yellow-green or light green; with nitrogen deficiency in the mid-growth stage, the lower leaves turn yellow early, the flower head is small, and the growth of vegetative organs deteriorates noticeably, caus...
What happens when sunflowers lack nutrients? Here is a detailed introductionSunflowers show the following symptoms when lacking nutrients for reference:
Nitrogen deficiency Growth is slow at the seedling stage, the plant is slender and weak, the leaves are small and thin, showing yellow-green or light green; with nitrogen deficiency in the mid-growth stage, the lower leaves turn yellow early, the flower head is small, and the growth of vegetative organs deteriorates noticeably, causing premature aging of the plant.
Potassium deficiency The plant grows slowly, the leaves turn yellow, and brown spots appear on the leaves; these spots eventually dry up into thin flakes that break off and fall, and the oil content decreases.
Boron deficiency After the leaves open, the growing point is damaged or dies, or axillary buds sprout to form plants; growth is abnormal, the plant is short, and the stem has brown hooked longitudinal band-like marks. After the flower head forms, the stem supporting the flower head loses the ability to follow the sun; some heads always hang down, while others always face upward. The lower old leaves are thick and dark green, the upper leaves are small and curled, the leaf mesophyll loses its green color, and the veins protrude.
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