Nitrogen-deficient plants are thin, branches are stiff, and leaf florets are small. The color of the leaves from the old leaves to the new leaves is gradually faded from the dark green, and then a reddish purple color appears until the chlorosis falls off, and the whole plant loses its green color in severe cases.
Prevention and control methods to increase the maturity of human waste, cake fertilizer, fertilizer or ammonium sulfate, urea, ammonium nitrate and other fertilizers.
The phosphorus-deficient leaves turned from dark green to copper-colored, and the veins (especially petiole) were yellow and purplish. The formation of flower buds is difficult, and the flowering is small but less and light, resulting in poor fruit development, even withered and withered earlier.
Control methods increase bone meal, fish gizzard, poultry or calcium superphosphate, ammonium phosphate, potassium phosphate (as phosphorus, potassium compound fertilizer), generally about 0.10% of the aqueous solution for the top dressing.
The potassium-deficient plants are short and the stems are soft and easy to fall. The leaves often shrink, old leaves appear dark brown spots along the edges of the leaves, the leaves turn yellow, and the middle and leaf veins are still green.
Control methods: increase the use of plant ash, 1% ~ 2% potassium chloride aqueous solution (ball and root tuber flowers are not used), 0.30% ~ 0.50% potassium nitrate aqueous solution for extra-root fertilizer, potassium phosphate and other inorganic fertilizers are also available. .
The calcium-deficient leaves are green and shrivelled, and the leaf margins are curled with white stripes. The flowers are blocked and the new leaves are difficult to unfold or become distorted.
Control methods in the sowing or pots before the first half, in the soil Shi Shi amount of calcium chloride, calcium can play a role in disinfection and disinfection (acidic flower hid), can also be used as topdressing calcium nitrate.
Mg-deficient plants do not thrive. The old leaves from the bottom to the top gradually disappear from the leaf edge to the green white, veins appear on all kinds of spots, and finally the entire leaf yellow.
The control method was sprayed 3-4 times continuously with a 0.20% to 0.40% magnesium sulfate aqueous solution for 7 to 10 days at a time. The soil with severe magnesium deficiency uses 5 to 10 kilograms of magnesium sulfate per acre and is mixed into the soil in autumn or winter.
The sulfur-deficient young leaves begin to yellow from the veins, and finally until the whole leaves turn yellow, and the roots develop abnormally.
Iron deficiency yellows from young leaves to old leaves.
Sulfur deficiency and iron deficiency control methods can be sprayed with 0.30% ferrous sulfate aqueous solution for 3 consecutive times at intervals of 1 week. The fog should be fine and uniform at the time of spraying. At the same time, 0.20% urea iron solution can be used for extra-root dressing.
Prevention and control methods to increase the maturity of human waste, cake fertilizer, fertilizer or ammonium sulfate, urea, ammonium nitrate and other fertilizers.
The phosphorus-deficient leaves turned from dark green to copper-colored, and the veins (especially petiole) were yellow and purplish. The formation of flower buds is difficult, and the flowering is small but less and light, resulting in poor fruit development, even withered and withered earlier.
Control methods increase bone meal, fish gizzard, poultry or calcium superphosphate, ammonium phosphate, potassium phosphate (as phosphorus, potassium compound fertilizer), generally about 0.10% of the aqueous solution for the top dressing.
The potassium-deficient plants are short and the stems are soft and easy to fall. The leaves often shrink, old leaves appear dark brown spots along the edges of the leaves, the leaves turn yellow, and the middle and leaf veins are still green.
Control methods: increase the use of plant ash, 1% ~ 2% potassium chloride aqueous solution (ball and root tuber flowers are not used), 0.30% ~ 0.50% potassium nitrate aqueous solution for extra-root fertilizer, potassium phosphate and other inorganic fertilizers are also available. .
The calcium-deficient leaves are green and shrivelled, and the leaf margins are curled with white stripes. The flowers are blocked and the new leaves are difficult to unfold or become distorted.
Control methods in the sowing or pots before the first half, in the soil Shi Shi amount of calcium chloride, calcium can play a role in disinfection and disinfection (acidic flower hid), can also be used as topdressing calcium nitrate.
Mg-deficient plants do not thrive. The old leaves from the bottom to the top gradually disappear from the leaf edge to the green white, veins appear on all kinds of spots, and finally the entire leaf yellow.
The control method was sprayed 3-4 times continuously with a 0.20% to 0.40% magnesium sulfate aqueous solution for 7 to 10 days at a time. The soil with severe magnesium deficiency uses 5 to 10 kilograms of magnesium sulfate per acre and is mixed into the soil in autumn or winter.
The sulfur-deficient young leaves begin to yellow from the veins, and finally until the whole leaves turn yellow, and the roots develop abnormally.
Iron deficiency yellows from young leaves to old leaves.
Sulfur deficiency and iron deficiency control methods can be sprayed with 0.30% ferrous sulfate aqueous solution for 3 consecutive times at intervals of 1 week. The fog should be fine and uniform at the time of spraying. At the same time, 0.20% urea iron solution can be used for extra-root dressing.
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