Application of wheat seed fertilizer can be quickly absorbed by seedlings, so that early rooting of wheat seedlings, early tiller, and promote strong seedlings. Application of wheat seed fertilizer can generally increase production by 10% -20%, especially in the case of soil barren, underfertility or misunderstanding late broadcast, the increase in production is particularly significant. When choosing seed fertilizers, care must be taken to use fast-acting fertilizers that have little side effects on seeds or young shoots. Commonly used seed fertilizers are:
Ammonium Sulfate In the existing nitrogen fertilizers, ammonium sulfate has low hygroscopicity and is easily dissolved. Appropriate application has no adverse effects on seed germination and seedling growth, and is most suitable for wheat seed fertilizers. Ammonium sulphate can be directly mixed with wheat seeds, 3-4 kilograms per acre, or 50% of the seed weight mixed with the wheat seed dry mix.
Urea urea has high nitrogen content but contains biuret, which affects seed germination and seedling growth, and should not be mixed with seeds. If you need to use urea as a seed fertilizer, you must use high quality urea, the amount can not be too large, 2-3 kg per mu. It is best to use a plant, so that the seed can be sowed after the first application of fertilizer, and the contact between the seed and the fertilizer is avoided as much as possible.
Superphosphate calcium superphosphate is easy to dissolve, but its mobility in the soil is small, its range is generally 1-3 cm, and most of it is concentrated in 0.5 cm of fertilization point. Contains free acid, corrosive, easy to absorb hygroscopic agglomerate, applied to the soil, easy to be chemically fixed in the soil and reduce the effectiveness of phosphorus. When making fertilizers, you must select premium quality products and not contact seeds. Application method: 1 application of superphosphate 5-7.5 kg per acre, mixed with 5-10 times of decomposed organic fertilizer, along the sowing groove applied below the seed or 2-3 cm below the side. 2) Use 3-5 kg ​​of superphosphate per acre, mix well with 1-2 times fine dry organic fertilizer (also use a small amount of fine dry soil to mix), and mix it with the dried seed after soaking. , with the mix with the broadcast.
The calcium magnesium phosphate fertilizer does not deliquescence, does not agglomerate, is not corrosive to the seeds, and has good physical properties. After being applied to the soil, it has low mobility and is not easily lost. It is easily decomposed by the acid in the soil solution and the acid secreted from the root of the crop, which is absorbed and utilized by the crop. It is advisable to make wheat seed fertilizer, 5-10 kilograms per mu, which can be used for seed dressing.
Diammonium phosphate is a phosphorus-based nitrogen and phosphorus binary compound fertilizer, 2.5-3 kg per mu, applied in the sowing ditch.
Potassium dihydrogen phosphate is a high-quality phosphorus, potassium compound fertilizer, used as a seed fertilizer, can improve the phosphorus and potassium nutrition at the seedling stage of wheat, and promote the roots under the bar, is conducive to seedlings full seedlings and safe winter. Application method: 1 seed dressing with potassium dihydrogen phosphate 500 grams, 5 kilograms of water, dissolved after mixing 50 kilograms of wheat seed, mix well bored 6 hours sowing. 2 Soaking The selected wheat seeds are soaked in a solution of 0.5% potassium dihydrogen phosphate for 6 hours, then removed by drying and sowing.
Potassium sulphate has low hygroscopicity, is easily soluble in water, is not easy to agglomerate, has good physical properties and is easy to apply. In potassium-depleted soil, potassium sulfate can be used as a seed fertilizer. After potassium sulfate is applied to soil, potassium ions can be directly absorbed and utilized by crops, and can also be adsorbed by soil colloids. The dosage per acre is 1.5-2.5 kg. It should be noted that potassium sulfate has a high content of fertilizers and cannot be in contact with the seeds so as not to burn seedlings. Be sure to control the dosage. Fertilizer and seeds should be 3-5 cm apart.
The use of zinc sulfate in zinc deficiency areas can increase wheat production by 10% to 18%. 1 seed dressing with 50 grams of zinc sulfate was dissolved in the appropriate amount of water, mixed with 50 kg of wheat seed, mixed and boring for 4 hours, dried after sowing. 2 Soaking Soak the selected wheat seeds in 0.05% zinc sulfate solution for 12-24 hours, remove and dry them.
The application of borax in areas with a deficiency of boron can increase wheat production by more than 10%. 1 10 grams of borax seed dressing, dissolved in 5 kg of water, mixed with 50 kg of wheat. 2 Soaking Soak the selected wheat seeds in a 0.01%-0.05% borax solution for 6-12 hours.
The application of manganese sulfate in areas lacking manganese can increase wheat production by about 15%. At the time of sowing, 4-6 g of manganese sulfate was used for seed dressing per kilogram of wheat seed.
Copper sulphate is seeded with copper sulfate in 0.2%-0.3% of the seed amount, and mixed for 12-17 hours after mixing.
The application of ammonium molybdate in areas where molybdenum is deficient can increase wheat production by more than 10%. 1) Use 2-6 grams of ammonium molybdate for each kilogram of wheat seed, and use the 40°C warm water to open the ammonium molybdate before dressing. 2 Soaking The selected wheat seeds can be soaked in 0.05%-0.1% ammonium molybdate solution for 12 hours.
In addition, fully cooked manure, cattle and sheep manure, pig manure, chicken manure, rabbit manure, etc., after crushing and sifting, all can be used as seed fertilizer application. As farmyard manure contains more organic matter, it can improve the soil and fertility, and it can be applied with wheat seed dressing.
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