A nitrogen deficiency: the plant is short and thin, the growth is slow, the leaves are narrow, the leaves are light green. In severe cases, the leaves turn yellow from the base, the tips are dry and dead, more no tillers, fewer secondary roots, and the stems are weak.
Correction: nitrogen deficiency in seedling stage and greening stage, 5 kg of urea can be applied per acre, and 10-15 kg can be applied after jointing stage.
Two phosphorus deficiency: the growth of wheat seedlings is slow, the leaves are dark green, dull, the leaves are blue-green, the leaves are purple-red, the stems are thin, the tillers are weak, the roots are poorly developed, the time for heading is delayed, the wheat empty grains are increased, and the 1000-grain weight is decreased. .
Correction: Phosphorus deficiency at seedling stage, 35-40 kg of superphosphate can be applied per acre; phosphorus deficiency in the middle and late stages, sprayed with 50-250 g of potassium dihydrogen phosphate per acre in the early stage of booting and flowering, 50 kg of water Spray again every 7-10 days, even spray 2-3 times.
3. Deficiency of potassium: The tip and leaf edge of the old leaves of the lower part of the wheat seed turn yellow first, then gradually turn brown, which looks like a fire in the long distance. When it is serious, the whole leaf is dry and the stem is small and weak, and it is easy to fall.
Correction: apply 10 kg of potassium chloride or 50 kg of ash per acre during seedling period; or spray 50 kg of 0.2%-0.3% potassium dihydrogen phosphate solution in the middle and late stages of wheat growth, spray again every 7-10 days. , even spray 2-3 times.
Four zinc deficiency: the leaves of wheat seedlings are chlorotic, the leaves are white, the plants are short in the middle and late stages, the leaves are small and brittle, the roots turn yellow, the empty grains are more, and the thousand grains are low.
Correction: 150-200 g of zinc sulphate is applied to 50 kg of water on the surface of the seedling and jointing stages.
Author: Huang Lihua Huaxian CABTS
Correction: nitrogen deficiency in seedling stage and greening stage, 5 kg of urea can be applied per acre, and 10-15 kg can be applied after jointing stage.
Two phosphorus deficiency: the growth of wheat seedlings is slow, the leaves are dark green, dull, the leaves are blue-green, the leaves are purple-red, the stems are thin, the tillers are weak, the roots are poorly developed, the time for heading is delayed, the wheat empty grains are increased, and the 1000-grain weight is decreased. .
Correction: Phosphorus deficiency at seedling stage, 35-40 kg of superphosphate can be applied per acre; phosphorus deficiency in the middle and late stages, sprayed with 50-250 g of potassium dihydrogen phosphate per acre in the early stage of booting and flowering, 50 kg of water Spray again every 7-10 days, even spray 2-3 times.
3. Deficiency of potassium: The tip and leaf edge of the old leaves of the lower part of the wheat seed turn yellow first, then gradually turn brown, which looks like a fire in the long distance. When it is serious, the whole leaf is dry and the stem is small and weak, and it is easy to fall.
Correction: apply 10 kg of potassium chloride or 50 kg of ash per acre during seedling period; or spray 50 kg of 0.2%-0.3% potassium dihydrogen phosphate solution in the middle and late stages of wheat growth, spray again every 7-10 days. , even spray 2-3 times.
Four zinc deficiency: the leaves of wheat seedlings are chlorotic, the leaves are white, the plants are short in the middle and late stages, the leaves are small and brittle, the roots turn yellow, the empty grains are more, and the thousand grains are low.
Correction: 150-200 g of zinc sulphate is applied to 50 kg of water on the surface of the seedling and jointing stages.
Author: Huang Lihua Huaxian CABTS
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
IBC Coupling 2 Side Female Thread
IBC adapter plastic fittings swivel double thread,Female thread Adapters 2' BSP, PP IBC adapter female thread
Cixi Chengtuo Hardware Parts Factory , https://www.ibccoupling.com