Trace elements play an irreplaceable role in the growth and development of wheat (such as nitrogen, phosphorus, potassium, etc.). The scientific application of trace element fertilizers is an important measure to ensure high yield and stable yield of wheat.
Wheat iron fertilizer per 1 ton of dry matter is formed, it needs to absorb 232 grams of iron. When iron is deficient, the leaves are yellow-green, small spots appear, white patches or streaks appear in the young leaves, and the old leaves are premature. Application method: When the wheat is found in the early stage of growth or when the plant is found to be deficient in iron, the leaf surface is sprayed with a 0.2% to 0.3% ferrous sulfate solution.
Boron wheat per 1 ton of dry matter is formed, it needs to absorb 18 grams of boron. When boron deficiency, bent stems and leaves hypertrophy, purple leaves, apical meristem death, to form a "dieback", filaments and tiller extension are not normal, wheat ear development is not good, poor seed set, severe late "and spike Not awkward." Applying boron fertilizer on boron-deficient soil can increase wheat yield by more than 10% . Application method: ( 1 ) as a base fertilizer. 1 kg of borax per acre was applied to the soil before sowing . ( 2 ) As a seed fertilizer. Use 10 g of borax , dissolve in 5 kg of water, mix 50 kg of wheat, or put the selected wheat seeds in 0.01% ~ 0.05% borax solution for 6 ~ 12 hours. ( 3 ) Top dressing. In the wheat seedling stage, jointing stage and booting stage, spray each time with 0.1% to 0.2% borax solution.
Manganese fertilizer wheat per 1 ton of dry matter is formed, it needs to absorb 26 g of manganese. When Mn deficiency, between the initial pulse chlorosis yellow, white and yellow fine spots, and then gradually expanded, even as brown streaks, near the blade tip has a clear horizontal line of weakened tissue, causing upper blade Bending and sag; the roots are poorly developed, and some are black and dead; the plants grow slowly, without tillers or few tillers. Application method: ( 1 ) as a base fertilizer. 1 kilogram of manganese sulfate per acre , combined with soil preparation into the soil. ( 2 ) As a seed fertilizer. When sowing, mix 4 to 6 grams of manganese sulfate per kilogram of wheat . ( 3 ) Top dressing. When wheat seedling, jointing, flowering stage or Mn deficiency symptoms appear plants, spraying with 0.1% to 0.2% manganese sulfate solution foliage.
Wheat copper fertilizer per 1 ton of dry matter is formed, it needs to absorb 8 g of copper. In the absence of copper, the new leaves are grayish green, the tip of the leaves is whitened, the leaves are twisted, and the white leaves are spotted or streaked in the lower part of the leaf sheath. The old leaves are easily broken or bent at the leaf tongue ; the internodes are shortened, the heading is small, and the head cannot be eared or ear Distorted shape, grain development or shrinkage. Application method: ( 1 ) as a base fertilizer. 1 with copper sulfate per acre ~ 1.5 kg, administered buried soil soil preparation. ( 2 ) As a seed fertilizer. When sowing , mix the seeds with 0.2% to 0.3% of the amount of copper sulfate , mix well and pile up for 12 to 17 hours. ( 3 ) Top dressing. During the growth period, wheat was found to be deficient in copper, and the foliage was sprayed with 0.2% to 0.4% copper sulfate solution in time.
Zn wheat per 1 ton of dry matter is formed, it needs to absorb 2l grams of zinc. Zinc deficiency, plant height tufted, twisted or crimped margin, both sides of the vein until a pale green to yellow, yellow edge stripes appear, white, green and white. According to local comparative tests, the application of zinc fertilizer in zinc-deficient areas can increase wheat yield by 10% to 18% . Application method: ( 1 ) as a base fertilizer. Use 1 to 2 kg of zinc sulfate per acre and apply to the soil during soil preparation. ( 2 ) Soaking seeds. The selected wheat seeds are placed in a 0.05% zinc sulphate solution, soaked for 12 to 24 hours, and then dried and sown. ( 3 ) for topdressing. In the wheat seedling stage, 1 kg of zinc sulphate per acre , 15 to 20 kg of fine dry soil or organic fertilizer , and ditching between rows, the earlier the effect is better. ( 4 ) Top dressing. Foliar sprays were applied with 0.1% to 0.2% zinc sulphate solution during wheat seedling, jointing and heading, or when zinc deficiency symptoms occurred in the plants .
Wheat molybdenum fertilizer per 1 ton of dry matter is formed, it needs to absorb the 0.87 g molybdenum. When Mo deficiency, small plant, slow growth, leaf chlorosis first end portion, and then the full leaf leaf lower portion of the heart, veins along with slender small, yellow-white spots in parallel, and connected in a line shape or a sheet gradually, and finally The ends of the leaves are dry and the whole leaves die when severe. Application method: ( 1 ) seed dressing. Use 2 to 6 grams of ammonium molybdate per kilogram of wheat ; first dissolve ammonium molybdate with warm water at 40 °C , then mix with the seeds . ( 2 ) Soaking seeds. The wheat seeds were soaked in a 0.05% to 0.1% ammonium molybdate solution for 12 hours, and then sown after drying. ( 3 ) Top dressing. When Mo deficiency symptoms, with 0.01% to 0.1% ammonium molybdate solution to be sprayed foliar wheat seedling emergence, jointing, booting or plant strain.
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