Taboos of fertilizers application & types

Fertilizers can help crops absorb nutrients better and promote their own growth. But the application of fertilizer is also contraindicated, slightly careless will occur fertilizer damage, resulting in losses.

Keep away from nutrients & fertilizers: “Some Taboos” of fertilizer application & types are:

1. Single use of chlorine-containing fertilizers and the use on chlorine avoiding crops is a taboo. The long-term and single application of potassium chloride can accumulate the chloride ion in soil, leaving the soil nutrient to be broken and soil acidification. It debases the quality when applied on such chlorine avoiding plants as beet and tobacco.
2. Watering immediately after application of urea. Urea is diffluent with high fluidity, and it is easy to cause loss. It is a taboo neither to water the crops immediately after the application of urea on dry land, nor to apply urea before heavy rain.
3. Watering immediately after application of urea. Urea is diffluent with high fluidity, and it is easy to cause loss. It is a taboo neither to water the crops immediately after the application of urea on dry land, nor to apply urea before heavy rain.
4. Ammonium would better not be applied on the surface of soil. With high volatility, ammonium is easy to wilt the seeding, so it is better to apply the ammonium in the deep earth instead of on the surface, and get it earthed.
5. Acid fertilizer should not be mixed with alkaline fertilizer. Ammonium bicarbonate, ammonium sulphate, ammonium nitrate, ammonium phosphate cannot be mixed with basic fertilizers such as grass ash, lime, potash fertilizer of kiln ash, and so on.
6. Chlorine fertilizer should not be used in saline and alkaline land and chlorine crops. Chlorine – free crops are tobacco, beet, potato, tea tree, peach tree, grape, citrus, sugar cane, watermelon and so on.
7. Nitrogen fertilizer should not be applied shallow or before watering. Nitrogen fertilizer is usually converted into ammonium nitrogen after it is applied into the soil.
8. Ammonium bicarbonate and urea cannot be mixed. The amide nitrogen in urea cannot be absorbed by crops, and can only be used by crops when it is converted into ammonium nitrogen under the action of adenase in the soil. When carbon and iron are applied into the soil, the soil solution will be acidic in a short time, which will accelerate the volatilization loss of nitrogen in urea, so it cannot be mixed applied.
9. Ammonium would better not be applied on the surface of soil. With high volatility, ammonium is easy to wilt the seeding, so it is better to apply the ammonium in the deep earth instead of on the surface, and get it earthed.
10. Ammonium bicarbonate should not be mixed with bacterial fertilizer, because the former will emit a certain concentration of ammonia gas, toxic to the latter’s active bacteria, will make the bacterial fertilizer lose its effectiveness.
11. Nitrogen fertilizer should not be more applied to leguminous crops. There are nitrogen-fixing rhizobia in the roots of leguminous crops. Excessive application of nitrogen fertilizer will not only cause waste, but also cause late ripening of crops and affect yield.
12. Ammonium is not used in greenhouse. Ammonium is known as “air fertilizer”, when applied in greenhouse, it breaks apart into ammonia gas rapidly.
13. It is not a good to use ammonium sulfate on a long term basis. As physiological acidity fertilizer, ammonium sulfate can destroy the physical structure of soil. Moreover, the long-term application can also cause the soil to be hardened and rigid resulting from the reaction between residual sulfate ion and calcium ion in soil.
14. Phosphate fertilizer should not be dispersed use. Phosphorus elements in phosphate fertilizer are easy to be absorbed and fixed by the soil, losing the fertilizer effect, we should first put the phosphate fertilizer and compost mixed compost in the compost compost for a period of time, and then apply in the ditch or hole near the root system of crops.
15. Don’t mix ammonium nitrogen fertilizer with alkaline fertilizer. The alkaline substance causes the loss of nitrogen from the ammonium nitrogen fertilizer such as ammonium, ammonium sulfate, ammonium nitrate and ammonium phosphate.
16. It is a taboo to disperse the phosphatic fertilizer. Phosphorus moves slowly and is easy to be absorbed and fixed by soil, which will then reduce its fertility. The contact area between phosphorus and soil should be minished, and it is better to adopt furrow application or hole application, making the fertilizer near plants’ root.
17. Don’t use nitrate nitrogen fertilizer on rice field. The nitrate ion dissociated from nitrate nitrogen fertilizer such as ammonium carbonate can be taken to the deep soil by water, where denitrification occurs that cause nitrogen loss.
18. Potash fertilizer is used in the late growth stage of the crops. Potash features the transfer from a plant’s stem leaf of root to the tender part of top where it can be reused. So potassium deficiency starts relatively late than nitrogen and phosphorus. For this reason, the potash fertilizer should be applied in the earlier stage of growth, or be used only once as a base fertilizer.
19. The fertilizer with high phosphorus content should not be more used for vegetables. Vegetables need relatively little phosphorus.
20. Potash fertilizer should not be used in the late period of crop growth. Be waiting for to have when potassium symptom is short, crop grows already near later period, at this moment again top dressing fertilizer already had not played how old effect, accordingly potash fertilizer should advance to crop seedling stage top dressing is applied, or make base fertilizer use.
21. Rare earth fertilizer should not be directly applied in the soil. The amount of rare earth fertilizer is small, the correct way to use rare earth fertilizer is to mix seeds or apply to the leaves spray.
22. Should not be divided into crop varieties and growth period indiscriminate fertilizer. Different crops and crops with different growth periods have different demands for varieties and quantities of fertilizers, and fertilization regardless of crops and periods will only backfire.
23. Avoid long-term application of ammonium sulfate. Ammonium sulfate is a physiological acid fertilizer. Long-term application in the same soil will increase its acidity and damage the aggregate structure. In alkaline soil, ammonium sulfate ammonium ion is absorbed, and acid root ion residue in the soil reacts with calcium, making the soil harden.
24. Not rotten farm manure and cake fertilizer should not be used directly. The uncooked farm manure and cake fertilizer contains a variety of insect eggs, bacteria, but also produce a lot of carbon dioxide gas and heat, direct use will pollute the soil, accelerate the evaporation of soil water, burn the root system of crops, affect the germination of seeds. The correct method of use is, first will farm manure and cake fertilizer full heap mature, after high temperature disinfection or pharmaceutical treatment reusing.
25. Nitrogenous containing compound fertilizer is not a good choice to be used on legume. There are azorhizobium caulinodans near roots of the plants such as soybean, peanut, mung bean, broad bean, pea and alfalfa. The massive application of nitrogenous containing compound fertilizer not only causes waste of fertilizer, but also reduces the nitrogen fixation ability by due to the restriction of the activity of nodule bacteria.