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The SPAD-502 chlorophyll meter measures the chlorophyll content of the plant based on the principle of light transmittance of the leaves in two wavelength ranges. The greatest advantage of the SPAD-502 chlorophyll meter is that it can measure the relative chlorophyll value of the leaf in a relatively short period of time. Display is also very convenient, in the LED can directly display the chlorophyll value, in addition to the convenience of field measurement needs, SPAD-502 chlorophyll meter is set to a small and portable shape, very easy to carry with you, the measurement accuracy is also very high, can be Good for the determination of plant chlorophyll content.
The process of the experiment was to take five leaves of flower plants (safflower, white flowers, yellow flowers, etc.), a small amount of herbaceous plants, stems and leaves, and a few green leaves of trees and shrubs. The flowers and herbs were measured using the SPAD-502 chlorophyll meter. The chlorophyll content of the woody leaves was then measured and averaged over five groups of data and taken into account. Three measurements were used to reduce errors. The following items need to be noticed in the experiment: To prevent the lens from contaminating the lens and causing experimental errors, it is necessary to clean the lens in time after use; avoid using thicker leaves; the lens is completely covered on the blade to ensure light transmittance.
The structure of SPAD-502 chlorophyll meter showed that the chlorophyll content of these leaves was: woody> herb> flower. Because chlorophyll contains Mg, N, C, H, O and other elements. The lack of N will impede the synthesis of chlorophyll, resulting in yellowing of the leaves, and the photosynthesis will be weakened or even stopped. Therefore, the test results also showed that the nitrogen fertilizer requirements of these plants were: woody> herb> flower.
SPAD-502 Chlorophyllin Explores the Use of Chlorophyll and Nitrogen Fertilizers in Different Plants
In general, the content of chlorophyll in plants is closely related to the content of nitrogen in leaves. The SPAD-502 chlorophyll meter is widely used in the determination of chlorophyll content in plants in recent years. Therefore, the use of SPAD-502 chlorophyll meter to determine the plant chlorophyll content, you can know the plant's demand for nitro, thereby controlling the amount of nitrogen fertilizer application, improve the nitrogen utilization and reduce the excessive nitrogen fertilizer caused by environmental pollution.