After understanding the antagonism, you will know why the fertilization effect is not good.
The interaction between nutrient elements refers to the mutual effects of nutrients in the soil or in the plants, or the different effects of one element when applied in different levels with the second element. That is to say, the promotion or antagonism that can be produced between the two nutrients. This interaction occurs between a large number of elements, between trace elements, and between trace elements and large amounts of elements. It can occur in the soil or in plants. Since these interactions alter the nutrition of plants, these interactions must be understood and considered in order to supply the appropriate nutrients.
Antagonism
Antagonism between nutrients refers to the presence of a nutrient (or ion) that inhibits the absorption of another nutrient (or ion), mainly between the cation and the cation, between the anion and the anion.
Synergism
Synergism is mainly manifested in the mutual absorption of nutrients
Nitrogen → absorption of nitrate nitrogen is more difficult than absorption of ammonia nitrogen; application of excess potassium and phosphorus affects the absorption of nitrogen; boron deficiency is not conducive to nitrogen absorption.
Phosphorus→increasing zinc can reduce the absorption of phosphorus; polynitrogen is not conducive to the absorption of phosphorus; iron also has an antagonistic effect on the absorption of phosphorus; the addition of lime can make phosphorus into an unacceptable state; magnesium can promote the absorption of phosphorus.
Potassium→increasing boron promotes the absorption of potassium, zinc can reduce the absorption of potassium; polynitrogen is not conducive to the absorption of potassium; calcium and magnesium have an antagonistic effect on the absorption of potassium.
Calcium→potassium affects calcium absorption and lowers calcium nutrition level; magnesium affects calcium transport, magnesium and boron have antagonistic effect on calcium; ammonium salt can reduce calcium absorption and reduce calcium to fruit transfer; sodium and sulfur are applied It also reduces the absorption of calcium; increasing the aluminum, manganese, and nitrogen in the soil also reduces the absorption of calcium.
Magnesium→potassium affects the absorption of magnesium. A large amount of sodium and phosphorus is not conducive to the absorption of magnesium. Polynitrogen can cause magnesium deficiency. Magnesium and calcium, potassium, ammonium, hydrogen have antagonistic effects, and the addition of sulfates can cause magnesium deficiency. Magnesium can eliminate the toxicity of calcium. Magnesium deficiency is easy to induce zinc deficiency and manganese deficiency. Magnesium and zinc have mutually reinforcing effects.
Iron→polyboron affects the absorption of iron and reduces the iron content in plants. Nitrate nitrogen affects the absorption of iron, and vanadium and iron have antagonistic effects. The elements causing iron deficiency are more, and their order is Ni>Cu>Co> Gr>Zn>Mo>Mn, potassium deficiency can cause iron deficiency; a large amount of nitrogen, phosphorus and calcium can cause iron deficiency.
Boron→iron and aluminum oxides can cause boron deficiency; aluminum, magnesium, calcium, potassium, and sodium hydroxides can cause boron deficiency; long-term lack of nitrogen, phosphorus, potassium, and iron can lead to boron deficiency; increased potassium can be aggravated The lack of boron, the lack of potassium will lead to a small amount of boron poisoning; the increase in nitrogen, the amount of boron required, will lead to the lack of boron. Manganese is not good for boron absorption, and plants need appropriate Ca/B and K/B ratios and appropriate Ca/Mg ratios.
Manganese→calcium, zinc and iron hinder the absorption of manganese, and the hydroxide of iron causes the manganese to precipitate. Manganese is fixed by applying a physiological alkaline fertilizer. Vanadium can slow the toxicity of manganese.
Sulfur and chlorine can increase the manganese in the released state and the effective state, which is beneficial to the absorption of manganese, which is not conducive to the absorption of manganese.
Molybdenum→nitrate nitrogen is beneficial to the absorption of molybdenum, and ammonia nitrogen is not conducive to the absorption of molybdenum; sulfate is not conducive to the absorption of molybdenum. A large amount of calcium, aluminum, lead, and iron, copper, and manganese all hinder the absorption of molybdenum. In the state of phosphorus deficiency and sulfur deficiency, molybdenum is inevitably deficient, increasing phosphorus is beneficial to the absorption of molybdenum, and increasing sulfur is unfavorable; when phosphorus is abundant, more molybdenum is required. Therefore, excessive phosphorus sometimes leads to the lack of molybdenum.
Zinc → causes zinc to form hydroxides, carbonates and phosphates in an unacceptable state. Plants require an appropriate P/Zn ratio (typically 100-120, more than 250 zinc deficiency). Excessive phosphorus can lead to zinc deficiency. When nitrogen is used, it needs more zinc. Sometimes it will lead to zinc deficiency. Nitrate is beneficial to zinc absorption. Ammonium nitrogen is not conducive to zinc absorption. Increased potassium and calcium are not conducive to zinc absorption. The absorption of manganese, copper and zinc is unfavorable. There is mutual absorption between magnesium and zinc. Zinc deficiency leads to less potassium in the roots. The clay with a low Si/Mg ratio in the soil will be deficient in Zn, which antagonizes the absorption of iron.
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