When iron-fertilized wheat is iron-deficient, the leaves are yellow-green in color, small spots occur, white patches or stripes appear in young leaves, and old leaves are withered. Application method: In the early stage of wheat growth or when iron deficiency is found in the plant, spray with 0.2-0.3% ferrous sulfate solution.
When Boron was deficient in boron, the stems and leaves were hypertrophic and bent, the leaves were purple, and the apical meristems were dead. The top dead 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. "Spike but not squeak." 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) for seed fertilizer. With 10 grams of borax, dissolved in 5 kg of water, mixed with 50 kg of wheat seed, or the selected wheat seed into the 0.01-0.05% borax solution soak 6-12 hours; (3) top dressing. In the wheat seedling stage, jointing stage and booting stage, spray 0.1-0.2% borax solution once.
Manganese fertilization When wheat is deficient in manganese, the veins depigment and yellowish-white spots appear at the beginning of the wheat, and then they gradually enlarge and form yellow-brown stripe spots. There is a clear horizontal line of weakness near the tips of the leaves. The upper end of the leaf blade is sagging; roots are poorly developed and some are black and dead; plants grow slowly, with no or very few tillers. Application method: (1) as base fertilizer. 1 kg of manganese sulfate per acre, combined with soil preparation applied to the soil; (2) for seed fertilizer. When sowing, stir 4-6 grams of manganese sulfate per kilogram of wheat seed; (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 0.1-0.2% manganese sulfate solution.
When the copper fertilizer is copper-deficient, the new leaves are gray-green, the tips of the leaves are whitened, the leaves are twisted, and gray spots or stripes appear on the lower part of the leaf sheath. The old leaves are easily broken or bent at the ligule; the internodes of the copper leaf are shortened, and the earing is less, and when serious Heading or twisting of the spikes, secondary flowers on the spikelets aborted, grain incomplete or shrinking. Application method: (1) as base fertilizer. Use 1-1.5 kg of copper sulphate per acre and apply it to the soil when it is settling; (2) Use as a fertilizer. When seeding, use copper sulfate to seed the seed 0.2-0.3%, mix and boring for 12-17 hours; (3) top-dressing. During the growing season, wheat was found to be copper-deficient and timely sprayed with 0.2-0.4% copper sulfate solution.
In zinc deficiency wheat, the plants are dwarfed and clustered, and the leaf margins are twisted or shrunken. The veins turn from green to yellow on both sides of the veins, and yellow, white and green stripes appear on the edges. According to local comparative tests, the application of zinc fertilizer in zinc-deficient areas can increase wheat production by 10-18%. Application method: (1) as base fertilizer. Use 1-2 kg of zinc sulfate per acre, apply it to the soil when it is settling; (2) soak seeds. Put the selected wheat seeds into a 0.05% zinc sulfate solution, soak for 12-24 hours, remove and dry to dry, and (3) topdressing. In the wheat seedling stage, 1 kg of zinc sulfate is used per acre, and 15-20 kg of fine dry soil or organic fertilizer is applied to the rows. The sooner the effect is, the better; (4) The fertilizer is applied from the root to the outside. In the wheat seedling stage, jointing stage, and after heading, or when symptoms of zinc deficiency occur in plants, foliar spraying is performed with a 0.1-0.2% zinc sulfate solution.
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