In the process of growth and development of wheat, in addition to a large amount of nitrogen, phosphorus and potassium, a variety of micro-fertilizers are needed. If a certain trace element is lacking, it cannot grow normally.
1 zinc deficiency
1.1 symptoms of zinc deficiency. Distorted or shrunken, the leaves are turned from green to yellow and white on both sides, showing a yellow, white and green stripe.
1.2 Remedy: 1 Based on the application of nitrogen, phosphorus and potassium at the bottom of the wheat planting, zinc sulphate per kg of 667 m2. 2 It is found that immediately after spraying zinc, spraying with 0.3% ~ 0.4% zinc sulphate solution, continuous spraying 2 ~ 3 times, can make the wheat leaves turn green.
2 boron deficiency
2.1 Symptoms. The tip of the leaf is purple-brown, the growth period is postponed, the ear is divided and the alfalfa is not scattered, the pollen is less or deformed, sometimes there is no pollen, the ovary is laterally enlarged, the glume is not closed in the early stage, and the later is withered, the ear is not real.
2.2 Remedial measures. 0.3 kg of borax or 0.2 kg of boric acid per 667 m2 of bottom; or foliar application with borax 150 ~ 200 g or boric acid 50 ~ 100 g to 50 ~ 60 kg, sprayed at wheat seedling stage and beginning stage Times.
3 iron deficiency
3.1 Symptoms. Iron deficiency is characterized by “greenness†or “chlorosisâ€. At the beginning, the young leaves were chlorotic and yellow, and the veins remained green. Afterwards, they completely lost green, and the whole leaves were yellowish white.
3.2 Remedial measures. Foliar spray was applied with 0.75% ~ 1.0% ferrous sulfate solution for 2 to 3 times, and the leaves were green.
4 copper deficiency
4.1 Symptoms. The tip of the blade turns white, the edge of the vein is yellow-gray, and when it is severe, it cannot be headed.
4.2 Remedial measures. 1 When planting, use 1 ~ 1.5 kg of copper sulfate per 667 m2 to mix the phosphate fertilizer as the base fertilizer. 2 found copper deficiency symptoms with 0.03% ~ 0.04% copper sulfate solution for foliar application.
5 lack of molybdenum
5.1 Symptoms. The leaves are faded, and fine yellow-white spots appear in parallel along the veins, and gradually become linear and flaky, and finally the front ends of the leaves are dried up.
5.2 Remedial measures. 1 When planting, mix 50 g of ammonium molybdate with phosphorus and potassium fertilizer every 667 m2. 2 found that the symptoms of hypoxia were sprayed with 0.05% ~ 0.1% ammonium molybdate solution per 667 m2, and sprayed 2 to 3 times.
Source: Hebei Rural Technology Network
1 zinc deficiency
1.1 symptoms of zinc deficiency. Distorted or shrunken, the leaves are turned from green to yellow and white on both sides, showing a yellow, white and green stripe.
1.2 Remedy: 1 Based on the application of nitrogen, phosphorus and potassium at the bottom of the wheat planting, zinc sulphate per kg of 667 m2. 2 It is found that immediately after spraying zinc, spraying with 0.3% ~ 0.4% zinc sulphate solution, continuous spraying 2 ~ 3 times, can make the wheat leaves turn green.
2 boron deficiency
2.1 Symptoms. The tip of the leaf is purple-brown, the growth period is postponed, the ear is divided and the alfalfa is not scattered, the pollen is less or deformed, sometimes there is no pollen, the ovary is laterally enlarged, the glume is not closed in the early stage, and the later is withered, the ear is not real.
2.2 Remedial measures. 0.3 kg of borax or 0.2 kg of boric acid per 667 m2 of bottom; or foliar application with borax 150 ~ 200 g or boric acid 50 ~ 100 g to 50 ~ 60 kg, sprayed at wheat seedling stage and beginning stage Times.
3 iron deficiency
3.1 Symptoms. Iron deficiency is characterized by “greenness†or “chlorosisâ€. At the beginning, the young leaves were chlorotic and yellow, and the veins remained green. Afterwards, they completely lost green, and the whole leaves were yellowish white.
3.2 Remedial measures. Foliar spray was applied with 0.75% ~ 1.0% ferrous sulfate solution for 2 to 3 times, and the leaves were green.
4 copper deficiency
4.1 Symptoms. The tip of the blade turns white, the edge of the vein is yellow-gray, and when it is severe, it cannot be headed.
4.2 Remedial measures. 1 When planting, use 1 ~ 1.5 kg of copper sulfate per 667 m2 to mix the phosphate fertilizer as the base fertilizer. 2 found copper deficiency symptoms with 0.03% ~ 0.04% copper sulfate solution for foliar application.
5 lack of molybdenum
5.1 Symptoms. The leaves are faded, and fine yellow-white spots appear in parallel along the veins, and gradually become linear and flaky, and finally the front ends of the leaves are dried up.
5.2 Remedial measures. 1 When planting, mix 50 g of ammonium molybdate with phosphorus and potassium fertilizer every 667 m2. 2 found that the symptoms of hypoxia were sprayed with 0.05% ~ 0.1% ammonium molybdate solution per 667 m2, and sprayed 2 to 3 times.
Source: Hebei Rural Technology Network
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