Symptoms of magnesium deficiency in crops
Poaceae: Poaceae is not highly sensitive to magnesium, but if magnesium deficiency is severe in the field, crops will exhibit corresponding symptoms. When magnesium deficiency occurs in Poaceae crops, it can cause the leaves to turn green and yellow, but the veins do not change color. During the growth period, the number of capillary roots decreases, and during the mature period, the grains will dry up and yield will decrease.
Leguminous crops: Leguminous crops are highly sensitive to magnesium and are prone to symptoms of magnesium deficiency. When leguminous crops lack magnesium, the early mesophyll cells of old leaves turn yellow, and in severe cases, brown spots appear on the leaves, which eventually wither. Maturity leads to a decrease in yield, a decrease in protein and oil content in seeds, and a decrease in nutritional components.
Leaf vegetables: Leaf vegetables have a high sensitivity to magnesium. When Chinese cabbage lacks magnesium, the leaves turn yellow, and in severe cases, they do not wrap around the heart, leading to a decrease in disease resistance; When cauliflower lacks magnesium, the leaves become thinner, the leaf flesh turns yellow, and in severe cases, it cannot bear flower bulbs or has abnormal growth.
Solanaceae: Solanaceae crops are highly sensitive to magnesium. When plants lack magnesium, yellow spots often appear on their old leaves, followed by dense adhesion of yellow spots, which can lead to abnormal growth of stamens and affect pollination rates. Maturity can lead to deformities, decreased nutritional content, and decreased commercial value of eggplant fruits. Plants that are left behind lack magnesium, resulting in a lower rate of withered and sprouted seeds.
Citrus: Citrus crops have a high sensitivity to magnesium (which is related to the general lack of magnesium in acidic soil in the south). When plants lack magnesium, their leaves turn yellow as mesophyll cells, and the surface of the leaves is rough. When magnesium deficiency is severe, the navel of the fruit turns yellow early, resulting in a decrease in fruit quality. Long term magnesium deficiency may lead to a decrease in tree stress resistance, ultimately resulting in plant death.
Other crops: Apple, jujube, pear and other fruit trees in the north may also experience magnesium deficiency symptoms, mainly manifested on the leaves, and in severe cases, it can affect crop yield and quality. In addition, cotton is also a magnesium sensitive crop. When magnesium is lacking, the leaf mesophyll will turn red, resulting in a significant decrease in yield.
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