Injury symptoms. When wheat is deficient in zinc, the internodes are shortened, the leaves are clustered, the leaf margins are wrinkled, and the veins are white and green. It is a striped strip of yellow, white, green, and white. The white seedlings and the yellow seedlings appear. When severe, Dead seedlings emerged, and headings were delayed, and there were fewer spikelets.
Causes. The zinc content in the soil is reduced. The high yield of crops in successive years and the decrease of zinc content in soil are the main factors leading to the high incidence of zinc deficiency in wheat.
Chemical Fertilizer Nitrogen, Phosphorus Application Excess. As people are increasingly pursuing crop yields, the use of chemical fertilizers is increasing, especially with the increase in the use of nitrogen and phosphorus, virtually increasing the concentration of soil solution and increasing the difficulty of absorbing and aspirating wheat; secondly, zinc There is an antagonistic effect on the absorption of fertilizer and phosphate fertilizer. In soils with high effective phosphorus content, zinc deficiency is often induced. Reasonable soil phosphorus, zinc ratio is 25:1, the greater the proportion of phosphorus, zinc, the lower the chance of wheat absorption of zinc; In addition, high soil nitrogen, but also inhibited the effectiveness of soil zinc.
The increase of soil organic matter and the increase of microbial activity in the soil combine with effective zinc in the soil, thereby reducing the content of available zinc in the soil and showing temporary zinc deficiency. This symptom usually disappears after a period of time after the growth and development of wheat.
The increase in soil multiple cropping index has taken away a large amount of zinc from the soil, resulting in a low effective zinc content in the soil.
Prevention and control measures. Use formula fertilizer. According to the law of wheat's demand for fertilizer and soil nutrient content, scientific selection and use of fertilizer, Henan Province and northern Hebei Province can choose to use Wooli brand wheat formula fertilizer to prevent wheat from zinc deficiency.
Balanced fertilization. First, do not apply a single long-term fertilizer; Second, based on fertility and target yield reasonable fertilization; Third, according to the characteristics of wheat during growth to determine a reasonable proportion and methods of sub-fertilization, to eliminate a shelling fertilization habits.
Used as base fertilizer. With zinc sulfate 1-2kg/666.7m2, when the soil preparation is mixed fertilizer or sandy soil applied to the soil, generally 3-5 years once, can effectively make up for the effective zinc content in the soil.
Science soaking. Place the selected wheat seeds in 0.05% zinc sulfate solution, soak for 12-24 hours, remove and dry them.
Foliar spraying fertilizer. The 0.3%-0.4% zinc sulfate solution can be sprayed on the foliage and sprayed continuously for 2-3 times. The interval time is 5-7 days. It is best to mix and spray with amino acid and humic acid foliar fertilizer.
Precautions. Do not exceed 2 kg/mu when using Zn fertilizer as base fertilizer, and do not exceed four-thousandths of an inch when spraying foliar fertilizer. Otherwise, it will cause poisoning, which will adversely affect crop growth. Zinc fertilizer has poor mobility in soil and is easily fixed by soil. Therefore, be sure to spread evenly and spray evenly on the leaves. It is best to spray on the front and back sides of the crop leaves, otherwise the effect is not good. Do not mix zinc fertilizer with alkaline fertilizers or alkaline pesticides, otherwise it will reduce fertilizer efficiency. Zinc fertilizer has a post-effect. It does not need to be used as a basal fertilizer for consecutive years. Generally, the effect of application is good every other year.
Causes. The zinc content in the soil is reduced. The high yield of crops in successive years and the decrease of zinc content in soil are the main factors leading to the high incidence of zinc deficiency in wheat.
Chemical Fertilizer Nitrogen, Phosphorus Application Excess. As people are increasingly pursuing crop yields, the use of chemical fertilizers is increasing, especially with the increase in the use of nitrogen and phosphorus, virtually increasing the concentration of soil solution and increasing the difficulty of absorbing and aspirating wheat; secondly, zinc There is an antagonistic effect on the absorption of fertilizer and phosphate fertilizer. In soils with high effective phosphorus content, zinc deficiency is often induced. Reasonable soil phosphorus, zinc ratio is 25:1, the greater the proportion of phosphorus, zinc, the lower the chance of wheat absorption of zinc; In addition, high soil nitrogen, but also inhibited the effectiveness of soil zinc.
The increase of soil organic matter and the increase of microbial activity in the soil combine with effective zinc in the soil, thereby reducing the content of available zinc in the soil and showing temporary zinc deficiency. This symptom usually disappears after a period of time after the growth and development of wheat.
The increase in soil multiple cropping index has taken away a large amount of zinc from the soil, resulting in a low effective zinc content in the soil.
Prevention and control measures. Use formula fertilizer. According to the law of wheat's demand for fertilizer and soil nutrient content, scientific selection and use of fertilizer, Henan Province and northern Hebei Province can choose to use Wooli brand wheat formula fertilizer to prevent wheat from zinc deficiency.
Balanced fertilization. First, do not apply a single long-term fertilizer; Second, based on fertility and target yield reasonable fertilization; Third, according to the characteristics of wheat during growth to determine a reasonable proportion and methods of sub-fertilization, to eliminate a shelling fertilization habits.
Used as base fertilizer. With zinc sulfate 1-2kg/666.7m2, when the soil preparation is mixed fertilizer or sandy soil applied to the soil, generally 3-5 years once, can effectively make up for the effective zinc content in the soil.
Science soaking. Place the selected wheat seeds in 0.05% zinc sulfate solution, soak for 12-24 hours, remove and dry them.
Foliar spraying fertilizer. The 0.3%-0.4% zinc sulfate solution can be sprayed on the foliage and sprayed continuously for 2-3 times. The interval time is 5-7 days. It is best to mix and spray with amino acid and humic acid foliar fertilizer.
Precautions. Do not exceed 2 kg/mu when using Zn fertilizer as base fertilizer, and do not exceed four-thousandths of an inch when spraying foliar fertilizer. Otherwise, it will cause poisoning, which will adversely affect crop growth. Zinc fertilizer has poor mobility in soil and is easily fixed by soil. Therefore, be sure to spread evenly and spray evenly on the leaves. It is best to spray on the front and back sides of the crop leaves, otherwise the effect is not good. Do not mix zinc fertilizer with alkaline fertilizers or alkaline pesticides, otherwise it will reduce fertilizer efficiency. Zinc fertilizer has a post-effect. It does not need to be used as a basal fertilizer for consecutive years. Generally, the effect of application is good every other year.
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