Nitrogen deficiency: After the nitrogen deficiency of peanuts, the plants grow poorly, the leaves become smaller, and the color is light yellow, which affects the formation of fruit needles and the development of pods. The stem slowly turns red, the nodule formation is less, and the branches are less.
Control measures: 1. Apply sufficient organic fertilizer; 2. Inoculate rhizobium; 3. Increase the application of phosphate fertilizer to promote its own nitrogen fixation capacity; 4. Apply 5 to 10 kg of ammonium sulfate per acre before flowering, the best condition with organic fertilizer Apply after 15 to 20 days of tanning.
Phosphorus deficiency: When the peanut is deficient in phosphorus, the leaves are dark green, the stems are thin, the color is purple, the nodules are few, the flowers are few, and the pods are poorly developed.
Control measures: 15 to 25 kg of calcium phosphate per acre, mixed with organic fertilizer for 15 to 20 days and then applied as base fertilizer.
Potassium deficiency: When the peanut is deficient in potassium, it begins to show that the leaf color becomes darker, and then the macula appears at the tip of the leaf, and then develops into a light brown dark spot on the leaf green. Eventually, the leaf green tissue is scorched, the veins remain green, the leaves lose water and curl, and the pods are less or deformed.
Control measures: 1. Apply 150 kg of grass ash per mu, 2. Use 5 to 10 kg of potassium chloride or potassium sulfate per acre, or spray 0.3% potassium dihydrogen phosphate on the foliage.
Iron deficiency: When the peanut is iron-deficient, the leaf flesh is chlorotic, and in severe cases, the veins are also chlorotic.
Control measures: 1. Apply soluble ferrous sulfate as base fertilizer, preferably mixed with organic fertilizer. 2. Soak the seeds with 0.1% ferrous sulfate for 12 hours. 3. Spray 0.2% aqueous ferrous sulfate solution on the leaf surface of the flowering or pod-forming period, once every 5 to 6 days, and spray continuously for 2 to 3 times.
Calcium deficiency: When the peanut is deficient in calcium, the pod seed kernel develops poorly and forms an empty fruit. Calcium deficiency often forms "black germ", and the calcium-deficient peanut fruit shell is not dense and easy to rotten fruit. When the calcium deficiency is serious at the seedling stage, the leaf surface is chlorotic, the petiole is broken or the growth point is wilting, and the root is not differentiated.
Measures to prevent calcium deficiency: 15-20 kg per mu of superphosphate in the middle of growth.
Huaxian Agricultural Technology Promotion Center Shang Hongyan
Control measures: 1. Apply sufficient organic fertilizer; 2. Inoculate rhizobium; 3. Increase the application of phosphate fertilizer to promote its own nitrogen fixation capacity; 4. Apply 5 to 10 kg of ammonium sulfate per acre before flowering, the best condition with organic fertilizer Apply after 15 to 20 days of tanning.
Phosphorus deficiency: When the peanut is deficient in phosphorus, the leaves are dark green, the stems are thin, the color is purple, the nodules are few, the flowers are few, and the pods are poorly developed.
Control measures: 15 to 25 kg of calcium phosphate per acre, mixed with organic fertilizer for 15 to 20 days and then applied as base fertilizer.
Potassium deficiency: When the peanut is deficient in potassium, it begins to show that the leaf color becomes darker, and then the macula appears at the tip of the leaf, and then develops into a light brown dark spot on the leaf green. Eventually, the leaf green tissue is scorched, the veins remain green, the leaves lose water and curl, and the pods are less or deformed.
Control measures: 1. Apply 150 kg of grass ash per mu, 2. Use 5 to 10 kg of potassium chloride or potassium sulfate per acre, or spray 0.3% potassium dihydrogen phosphate on the foliage.
Iron deficiency: When the peanut is iron-deficient, the leaf flesh is chlorotic, and in severe cases, the veins are also chlorotic.
Control measures: 1. Apply soluble ferrous sulfate as base fertilizer, preferably mixed with organic fertilizer. 2. Soak the seeds with 0.1% ferrous sulfate for 12 hours. 3. Spray 0.2% aqueous ferrous sulfate solution on the leaf surface of the flowering or pod-forming period, once every 5 to 6 days, and spray continuously for 2 to 3 times.
Calcium deficiency: When the peanut is deficient in calcium, the pod seed kernel develops poorly and forms an empty fruit. Calcium deficiency often forms "black germ", and the calcium-deficient peanut fruit shell is not dense and easy to rotten fruit. When the calcium deficiency is serious at the seedling stage, the leaf surface is chlorotic, the petiole is broken or the growth point is wilting, and the root is not differentiated.
Measures to prevent calcium deficiency: 15-20 kg per mu of superphosphate in the middle of growth.
Huaxian Agricultural Technology Promotion Center Shang Hongyan
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Huilifeng Anti-Corrosion And Insulation Steel Pipe Group Co., Ltd , http://www.tj-steeltube.com