Relationship between chlorophyll content and iron elements and its prospects Iron ions are one of the most fixed elements in plants, usually present as macromolecules, with little fluidity, and iron in old leaves cannot migrate to new tissue. Iron deficiency first appeared on young plants. Iron-deficient plant leaves chlorosis and chlorosis, often bleached heart, called chlorosis. The so-called chlorosis is the reduction of chlorophyll content in the leaves of plants. Chlorophyll content can be measured using a chlorophyll meter for rapid, non-invasive measurements.
Chlorophyll detectors were used to detect chlorophyll in plants and apply appropriate concentrations of iron-containing fertilizer. After the measurement, it was found that iron directly affected the synthesis of chlorophyll. At the same time, it was found that there were significant differences in chlorophyll content and active iron content between different treatments. Excessive iron or insufficient supply can cause a decrease in chlorophyll content. When the concentration of Fe2+ is less than 30μmol·L-1, iron deficiency stress is caused on the plant, which can not meet the needs of plant growth. When the concentration of Fe2+ is higher than 120μmol·L-1, the plant will cause excessive iron stress. Affects the normal growth of the plant.
Measuring the chlorophyll instrument during this measurement is critical. The chlorophyll meter is used to measure the chlorophyll content in the plant leaves. It is simple, rapid and non-destructive. It is widely used in nitrogen diagnosis and nitrogen fertilizer recommendation. application. The sap value measured by the chlorophyll meter increases in proportion to the nitrogen content in the leaves. For a particular crop species, the higher the SPAD index, the more abundant the nitrogen content, and the healthier the plant grows. By using the chlorophyll meter to test the nitrogen fertilizer of plants, it was found that the amount of nitrogen fertilizer can be reduced by 10% without affecting the yield. The control of the amount of nitrogen fertilizer is mandatory in many countries, mainly because of nitrogen. The cumulative effect of elements in the soil is not only the pollution of the soil, but also affects the lake tax and groundwater pollution.
Therefore, the use of portable chlorophyll meter in agriculture to detect the chlorophyll content of plants can reduce pollution, and at the same time, it can also increase production. Maybe in the near future, the relationship between chlorophyll and iron will be developed. Then use chlorophyll. To measure, it is not only possible to understand the deficiencies of nitrogen, but also to understand the lack of iron.

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