In addition to the large amount of nitrogen, phosphorus and potassium fertilizers, wheat needs a variety of trace elements throughout its growth and development. To this end, you need to look at the wheat leaves, and apply micro-fertilizer.
"Three colors" wrinkled leaves. When zinc is deficient in wheat growth period, the leaf margin of wheat leaves is shrunken or twisted. The leaves are greenish yellow and white on both sides, showing yellow, white and green stripes. In this case, when applying fertilizer, 1 kg of zinc sulfate is mixed with nitrogen, phosphorus and potassium fertilizer. When zinc deficiency symptoms are found, it can be sprayed on the leaf surface with 0.3%-0.4% zinc sulfate solution immediately. -3 times.
Yellow and white leaves. This type of leaf is caused by iron deficiency. At the beginning, the young leaves are green and yellow, the veins remain green, and the whole leaves are green. Later, the whole leaves are yellowish white. It can be sprayed 2-3 times with 0.75%-0.9% ferrous sulfate solution.
Sharp white leaves. The tip of the blade turns white and the edges are yellow-gray. These leaves are caused by copper deficiency. In severe cases, it is not possible to heading at the heading stage, and foliar application is carried out 2-3 times with 0.03%-0.04% copper sulfate solution.
Soft drooping leaves. In the absence of manganese, the leaves are soft and drooping, and the veins turn from green to yellow. For this, foliar spraying can be carried out twice with a 0.1% manganese sulfate solution.
Yellow and white spotted leaves. In the absence of molybdenum, the leaves faded, and fine yellow-white spots appeared in parallel along the veins, and gradually connected into a line or piece, and finally the front part of the blade was dried up. When molybdenum deficiency is found, it can be sprayed with 0.05%-0.1% ammonium molybdate solution for 2 to 3 times.
Purple brown leaves. When the wheat is deficient in boron, the growth period is delayed, and the sheath is purple-brown. At the same time, its flowers are not loose powder, pollen is less or deformed, sometimes there is no pollen, the ovary is laterally enlarged, the husk is not closed in the early stage, and it is withered in the later stage. Can use borax 0.3 kg or boric acid 0.2 kg mixed with NPK fertilizer, or 150-200 g of borax or 50-100 g of boric acid for 50-60 kg of foliar spray, generally in wheat seedling stage, Spray once every spike.
"Three colors" wrinkled leaves. When zinc is deficient in wheat growth period, the leaf margin of wheat leaves is shrunken or twisted. The leaves are greenish yellow and white on both sides, showing yellow, white and green stripes. In this case, when applying fertilizer, 1 kg of zinc sulfate is mixed with nitrogen, phosphorus and potassium fertilizer. When zinc deficiency symptoms are found, it can be sprayed on the leaf surface with 0.3%-0.4% zinc sulfate solution immediately. -3 times.
Yellow and white leaves. This type of leaf is caused by iron deficiency. At the beginning, the young leaves are green and yellow, the veins remain green, and the whole leaves are green. Later, the whole leaves are yellowish white. It can be sprayed 2-3 times with 0.75%-0.9% ferrous sulfate solution.
Sharp white leaves. The tip of the blade turns white and the edges are yellow-gray. These leaves are caused by copper deficiency. In severe cases, it is not possible to heading at the heading stage, and foliar application is carried out 2-3 times with 0.03%-0.04% copper sulfate solution.
Soft drooping leaves. In the absence of manganese, the leaves are soft and drooping, and the veins turn from green to yellow. For this, foliar spraying can be carried out twice with a 0.1% manganese sulfate solution.
Yellow and white spotted leaves. In the absence of molybdenum, the leaves faded, and fine yellow-white spots appeared in parallel along the veins, and gradually connected into a line or piece, and finally the front part of the blade was dried up. When molybdenum deficiency is found, it can be sprayed with 0.05%-0.1% ammonium molybdate solution for 2 to 3 times.
Purple brown leaves. When the wheat is deficient in boron, the growth period is delayed, and the sheath is purple-brown. At the same time, its flowers are not loose powder, pollen is less or deformed, sometimes there is no pollen, the ovary is laterally enlarged, the husk is not closed in the early stage, and it is withered in the later stage. Can use borax 0.3 kg or boric acid 0.2 kg mixed with NPK fertilizer, or 150-200 g of borax or 50-100 g of boric acid for 50-60 kg of foliar spray, generally in wheat seedling stage, Spray once every spike.
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