How does critical concentration of nutrients differ from toxicity of micronutrients
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Essentiality of Elements in Plant Nutrition
A mineral element is considered essential to plant growth and development if the element is involved in plant metabolic functions and the plant cannot complete its life cycle without the element. Usually the plant exhibits a visual symptom indicating a deficiency in a specific nutrient, which normally can be corrected or prevented by supplying the nutrient. Terms commonly used to describe levels of nutrients in plants:
Deficient: When the concentration of an essential element is low enough to limit yield severely and distinct deficiency symptoms are visible. Extreme deficiencies can result in plant death. With moderate or slight deficiencies, symptoms may not be visible, but yields will still be reduced.
Critical range: The nutrient concentration in the plant below which a yield response to added nutrient occurs. Critical levels or ranges vary among plants and nutrients, but occur somewhere in the transition between nutrient deficiency and sufficiency.
Sufficient: The nutrient concentration range in which added nutrient will not increase yield but can increase nutrient concentration. The term luxury consumption is often used to describe nutrient absorption by the plant that does not influence yield.
Excessive or toxic: When the concentration of essential or other elements is high enough to reduce plant growth and yield. Excessive nutrient concentration can cause an imbalance in other essential nutrients, which also can reduce yield.
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A mineral element is considered essential to plant growth and development if the element is involved in plant metabolic functions and the plant cannot complete its life cycle without the element. Usually the plant exhibits a visual symptom indicating a deficiency in a specific nutrient, which normally can be corrected or prevented by supplying the nutrient. Terms commonly used to describe levels of nutrients in plants:
Deficient: When the concentration of an essential element is low enough to limit yield severely and distinct deficiency symptoms are visible. Extreme deficiencies can result in plant death. With moderate or slight deficiencies, symptoms may not be visible, but yields will still be reduced.
Critical range: The nutrient concentration in the plant below which a yield response to added nutrient occurs. Critical levels or ranges vary among plants and nutrients, but occur somewhere in the transition between nutrient deficiency and sufficiency.
Sufficient: The nutrient concentration range in which added nutrient will not increase yield but can increase nutrient concentration. The term luxury consumption is often used to describe nutrient absorption by the plant that does not influence yield.
Excessive or toxic: When the concentration of essential or other elements is high enough to reduce plant growth and yield. Excessive nutrient concentration can cause an imbalance in other essential nutrients, which also can reduce yield.
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Nutrients are different from micronutrients
Explanation:
- The majority of the minerals present in soil can enter plants through roots. Truth be told, in excess of sixty components of the 105 found so far are found in various plants. Some plant species amass selenium, some others gold, while a few plants developing close to atomic test destinations take up radioactive strontium. There are procedures that can identify the minerals even at a low fixation (10-8 g/mL).
- Toxicity Of Micronutrients:
- There is a restricted scope of fixations at which the micronutrients are ideal. Much the same as somewhat less than the basic focus prompts inadequacy, minimal more can cause danger. The mineral fixation that diminishes the dry load of plant tissue by 10% is viewed as harmful.
- The basic focus changes for every micronutrient and the danger level for any component likewise fluctuate for various plants. Along these lines, harmful side effects are hard to recognize. Besides, the overabundance of one component may hinder the take-up of another component. For instance, the overabundance of manganese may cause inadequacies of iron, calcium, and magnesium.
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