In agricultural production, it is very important to apply appropriate fertilizers at the best timing according to crop growth conditions and to timely supplement nutrients that are lacking in crops.
Now introduce some methods to identify crop fat deficiency diseases through fruit leaves to guide farmers' friends to better engage in production.
1. Nitrogen deficiency: Light green leaves, yellow leaves on the base leaves (old leaves), and gradually develop upwards, brown when dry. Plants are short, with few branches (branches) and premature aging. If fruit trees lack nitrogen, they are characterized by small fruit, few fruit, and hard skin.
2. Phosphorus deficiency: The leaves become smaller, the leaves are dark green or grayish green, lack luster, often red or purple. Such as corn, tomato and other crops on the stems and leaves, there are obvious purple stripes or spots. The stems are short and fine, with yellowing of the base leaves, delayed heading, flowering and maturation, and the seeds are small and not full. Corn ear tip; sweet potato, potato potato block smaller; fruit trees falling fruit.
3. Potassium deficiency: The stems are easy to fall down, and the edges of the leaves are yellowed, scorched and chipped. There are necrotic spots between the veins. The whole leaves are sometimes rolled or shrunken, and the brown roots are more; grain crops and other sugar-rich crops. Large amounts of potassium are needed in the later stages of crop growth, such as cereals and potatoes, watermelon, and grapes.
4, iron deficiency: pulsating between veins, showing a clear reticular pattern, severe when the entire leaf (especially young leaves) was pale yellow, and even white. Northern fruit trees such as apples and pears are prone to symptoms. Iron-sensitive crops include peanuts, corn, sorghum, potatoes, vegetables (spinach, tomatoes, etc.).
5. Boron deficiency: Firstly, it appears at the top, such as the phenomenon of growth at the top; the roots are not well developed; the leaves are dark green, the leaves are small, hypertrophy, the young leaves are deformed and shrunk, the veins are irregularly green, and the flower development is not perfect. Ears are not true, roots, berries heart rot and necrosis. Such as soybean "bud blight", apple "stubbing", celery "stem cracking disease", radish "heart rot" and so on are the reasons for the lack of boron.
6, zinc deficiency: leaf chlorosis, small clusters of leaves, leaf spots on both sides of the plant, plants dwarf, internode shortening, growth period delayed. If the tree lobular disease, white corn seedlings and so on.
7, lack of copper: young shoots appear on the young shoots chlorosis, leaf curls between the leaves were sickle-like, leaf necrosis spots, and then withered and died. For example, cereal grains are clustered and the top of the plant is white. When it is severe, it does not produce heading and is not strong. The lack of copper in fruit trees showed that the top leaves showed clusters, and the leaves and fruits were all faded.
8, lack of manganese: Early lack of manganese, small necrotic spots appear between the veins, veins appear dark green stripes were ribs. The loss of green is first manifested in the new leaves.
9, lack of molybdenum: first appeared on the old leaves, leaves chlorosis, yellow-green or orange-red leaf spot between the veins, leaf margin curling, leaves withering and even necrosis, leaves bent upward and withered, flower development inhibited, seed Not full. The efficiency of molybdenum fertilizer is mainly reflected in leguminous and cruciferous crops, with soybean and peanut being the most obvious.
Now introduce some methods to identify crop fat deficiency diseases through fruit leaves to guide farmers' friends to better engage in production.
1. Nitrogen deficiency: Light green leaves, yellow leaves on the base leaves (old leaves), and gradually develop upwards, brown when dry. Plants are short, with few branches (branches) and premature aging. If fruit trees lack nitrogen, they are characterized by small fruit, few fruit, and hard skin.
2. Phosphorus deficiency: The leaves become smaller, the leaves are dark green or grayish green, lack luster, often red or purple. Such as corn, tomato and other crops on the stems and leaves, there are obvious purple stripes or spots. The stems are short and fine, with yellowing of the base leaves, delayed heading, flowering and maturation, and the seeds are small and not full. Corn ear tip; sweet potato, potato potato block smaller; fruit trees falling fruit.
3. Potassium deficiency: The stems are easy to fall down, and the edges of the leaves are yellowed, scorched and chipped. There are necrotic spots between the veins. The whole leaves are sometimes rolled or shrunken, and the brown roots are more; grain crops and other sugar-rich crops. Large amounts of potassium are needed in the later stages of crop growth, such as cereals and potatoes, watermelon, and grapes.
4, iron deficiency: pulsating between veins, showing a clear reticular pattern, severe when the entire leaf (especially young leaves) was pale yellow, and even white. Northern fruit trees such as apples and pears are prone to symptoms. Iron-sensitive crops include peanuts, corn, sorghum, potatoes, vegetables (spinach, tomatoes, etc.).
5. Boron deficiency: Firstly, it appears at the top, such as the phenomenon of growth at the top; the roots are not well developed; the leaves are dark green, the leaves are small, hypertrophy, the young leaves are deformed and shrunk, the veins are irregularly green, and the flower development is not perfect. Ears are not true, roots, berries heart rot and necrosis. Such as soybean "bud blight", apple "stubbing", celery "stem cracking disease", radish "heart rot" and so on are the reasons for the lack of boron.
6, zinc deficiency: leaf chlorosis, small clusters of leaves, leaf spots on both sides of the plant, plants dwarf, internode shortening, growth period delayed. If the tree lobular disease, white corn seedlings and so on.
7, lack of copper: young shoots appear on the young shoots chlorosis, leaf curls between the leaves were sickle-like, leaf necrosis spots, and then withered and died. For example, cereal grains are clustered and the top of the plant is white. When it is severe, it does not produce heading and is not strong. The lack of copper in fruit trees showed that the top leaves showed clusters, and the leaves and fruits were all faded.
8, lack of manganese: Early lack of manganese, small necrotic spots appear between the veins, veins appear dark green stripes were ribs. The loss of green is first manifested in the new leaves.
9, lack of molybdenum: first appeared on the old leaves, leaves chlorosis, yellow-green or orange-red leaf spot between the veins, leaf margin curling, leaves withering and even necrosis, leaves bent upward and withered, flower development inhibited, seed Not full. The efficiency of molybdenum fertilizer is mainly reflected in leguminous and cruciferous crops, with soybean and peanut being the most obvious.
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