Trace elements play an important role in the growth and development of wheat, which can not be replaced by a large number of elements (such as nitrogen, phosphorus, potassium, etc.). Scientifically increasing trace element fertilizers is an important measure to ensure high yield and stable production of wheat.
Iron fertilizers need to absorb 232 grams of iron for each ton of dry matter formed. In the absence of iron, the leaves are yellow-green with small spots, white patches or stripes appear on young leaves, and old leaves are withered. Application method: In the early stage of wheat growth or when plants are found to be iron-deficient, the leaves are sprayed with 0.2% to 0.3% ferrous sulfate solution.
For each ton of dry matter formed by boron-fertilized wheat, 18 grams of boron need to be absorbed. In the absence of boron, the stems and leaves were hypertrophic and curved, the leaves were purple, the apical meristems died, and the "top wither" was formed. The filament elongation and the tillers were not normal. The ear development was not good and the seed setting rate was extremely poor. Do not worry." Application of boron fertilizer on boron-deficient soil can increase wheat production by more than 10%. Application method: (1) as base fertilizer. One kilogram of borax per acre was applied to the soil before sowing. (2) As a fertilizer. 10 grams of borax, soluble in 5 kilograms of water, mixed with 50 kg of wheat seed, or the selected wheat seeds into 0.01% ~ 0.05% borax solution soak 6 ~ 12 hours. (3) Top dressing. In the wheat seedling stage, jointing stage and booting stage, spraying with 0.1% to 0.2% borax solution once.
For each ton of dry matter formed by manganese fertilizer, 26 grams of manganese need to be absorbed. In the absence of manganese, the veins chlorosis between the yellow and white spots at the beginning of the veins, and then they gradually enlarge and form yellow-brown stripe spots. There is a clear, weaker horizontal line near the tip of the leaves, causing bending of the upper ends of the leaves. Drooping; poor root development, some black death; plant growth is slow, with no or very little delivery. Application method: (1) as base fertilizer. One kilogram of manganese sulfate per acre was used in combination with soil preparation. (2) As a fertilizer. When sowing, mix 4-6 grams of manganese sulfate per kilogram of wheat. (3) Top dressing. In the wheat seedling stage, jointing stage, flowering stage, or when the plants showed symptoms of manganese deficiency, they were sprayed with 0.1% to 0.2% manganese sulfate solution.
For each ton of dry matter formed from copper fertilizer wheat, 8 grams of copper need to be absorbed. In the absence of copper, the new leaves are gray-green, with whitened leaves, distorted leaves, and gray spots or stripes on the lower part of the leaf sheath. The old leaves are easily broken or bent at the ligule; the internodes of the leaves are shortened, the earing is short, and the heads or spikes cannot be severe when severe. Distorted, incomplete or shrinking kernels. Application method: (1) as base fertilizer. Use 1 to 1.5 kg of copper sulphate per acre and apply it to the soil when it is set. (2) As a fertilizer. When sowing, use copper sulfate to seed 0.2% to 0.3%, mix and boring for 12 to 17 hours. (3) Top dressing. During the growing season, wheat was found to be copper-deficient, and the leaves were sprayed with 0.2% to 0.4% copper sulfate solution in time.
For each ton of dry matter formed by zinc fertilizer wheat, 2l grams of zinc need to be absorbed. In the absence of zinc, the plants were dwarfed and clustered, and the leaf margins were twisted or shrunken. The veins on both sides of the veins changed from green to yellow until white, and yellow, white, and green stripes appeared on the edges. According to local comparative experiments, applying zinc fertilizer in zinc-deficient areas can increase wheat production by 10% to 18%. Application method: (1) as base fertilizer. Use 1 to 2 kg of zinc sulfate per acre and apply it to the soil when it is set. (2) Soaking. Place the selected wheat seeds in 0.05% zinc sulfate solution, soak for 12-24 hours, remove and dry them. (3) Top dressing. In the wheat seedling stage, 1 kg of zinc sulfate is used per mu, and 15-20 kg of dry soil or organic fertilizer is fined. The earlier the effect is, the better the effect is. (4) Top dressing. In the wheat seedling stage, jointing stage, and after heading, or when the plants exhibit symptoms of zinc deficiency, the foliage is sprayed with 0.1% to 0.2% zinc sulfate solution.
For each ton of dry matter formed by molybdenum wheat, 0.87 g of molybdenum needs to be absorbed. In the absence of molybdenum, the plants are dwarf, grow slowly, and the ends of the leaves turn whitish green first. Then on the full-spread leaves at the lower part of the heart, small, parallel yellow-white spots appear along the veins, and gradually become linear or flaky. Finally the leaves The end is dry and the whole leaf withered when it is severe. Application method: (1) seed dressing. Ammonium molybdate 2 to 6 grams per kilogram of wheat seed was used; the ammonium molybdate was first dissolved in warm water at 40Â°C and then seeded. (2) Soaking. Immerse wheat seeds with 0.05% to 0.1% ammonium molybdate solution for 12 hours, remove and dry to dry. (3) Top dressing. In the wheat seedling stage, the jointing stage, the booting stage or the emergence of molybdenum-deficient plants, the leaves were sprayed with 0.01% to 0.1% ammonium molybdate solution.
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