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When iron-fermented wheat is deficient in iron, the leaves are yellow-green, small spots appear, white patches or streaks appear in the young leaves, and the old leaves are premature. Method of application: Foliar application of 0.2-0.3% ferrous sulfate solution in the early stage of wheat growth or when the plant is found to be deficient in iron.
When boron is deficient in boron, the stems and leaves are thick and curved, the leaves are purple, the apical meristems die, and the "top dead" is formed. The filaments are stretched and the tillers are abnormal. The wheat ears are not well developed, and the seed setting rate is extremely poor. "The ear is 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, applied to the soil before sowing; (2) as a seed fertilizer. Use 10 grams 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.
When manganese is deficient in manganese, the initial pulse is chlorotic and yellowish, and yellowish white spots appear. Later, it gradually enlarges and becomes a yellow-brown streak. There is a clear horizontal line near the tip of the leaf, resulting in a weak horizontal line. The upper end of the blade is curved and drooping; the root system is poorly developed, and some are blackened to death; the plant grows slowly, without tillering or rarely tilling. Application method: (1) as a base fertilizer. 1 kg of manganese sulfate per acre, combined with soil preparation into the soil; (2) for seed fertilizer. When sowing, mix 4 to 6 grams of manganese sulfate per kilogram of wheat; (3) top dressing. In the wheat seedling stage, jointing stage, flowering stage or the presence of manganese deficiency in plants, the surface is sprayed with 0.1-0.2% manganese sulfate solution.
When the copper fertilizer is deficient in 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 ear can not be severe. Heading or spike-shaped twisting, secondary flower abortion on spikelets, grain dysplasia or shrinkage. Application method: (1) as a base fertilizer. 1 to 1.5 kg of copper sulfate per acre, applied to the soil during soil preparation; (2) used as seed fertilizer. When sowing, use copper sulphate to mix seeds at 0.2-0.3% of the seed amount, 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 it was sprayed with 0.2-0.4% copper sulfate solution in time. When zinc fertilizer is deficient in zinc, the plants are dwarfed, the leaf margins are twisted or shrunk, and the veins turn from green to yellow to white, and yellow, white and green stripes appear at the edges. According to local comparative tests, the application of zinc fertilizer in zinc-deficient areas can increase wheat yield by 10-18%. Application method: (1) as a base fertilizer. 1 to 2 kg of zinc sulfate per acre, applied to the soil during soil preparation; (2) soaking seeds. The selected wheat seeds are placed in a 0.05% zinc sulfate solution, soaked for 12 to 24 hours, and then dried for sowing; (3) for top dressing. In the wheat seedling stage, 1 kg of zinc sulphate per acre, 15-20 kg of fine dry soil or organic fertilizer, the ditch is applied to the line, the earlier the effect is better; (4) the top dressing. Foliar application of 0.1 to 0.2% zinc sulphate solution in wheat seedling, jointing and heading, or in the presence of zinc deficiency in plants.
Application of wheat micronutrient
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 fertilizer is an important technical measure for high yield and stable yield of wheat.
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