Chlorophyll measuring instrument is abbreviated as chlorophyll meter. It is a measuring instrument used to quickly measure the padding value. Through the use of SPAD values ​​to understand the status of nitrogen deficiency in plants, the SPAD value stands for (Soil and Plant Analyzer Development). That is, soil and crop analysis instruments, chlorophyll content measurement and judgment can help us to understand and analyze crop yield values. We have verified that there is a positive relationship between SPAD values ​​and the chlorophyll content of plants through experiments, and the use of chlorophyll detectors can be simple. Measure and determine the chlorophyll content in the plant.
The chlorophyll meter measures the relative content of chlorophyll in the current leaf by measuring the absorptivity of the leaves in two wavelength bands. Its measured chlorophyll value is expressed by the SPAD value. Studies have shown that there is a positive correlation between SPAD values ​​and chlorophyll content. The chlorophyll meter can be carried directly on the hand and taken to the field. It is not allowed to take off the leaves and it can be directly measured. Therefore, it is also called a portable chlorophyll meter.
The use of the SPAD502 chlorophyll meter in agriculture to determine the nitrogen content has passed the relevant certification. Through multiple test certifications, it has been found that the use of chlorophyll has been measured since the SPAD value, in order to understand the nitrogen content, can be done without affecting At the same time, the amount of nitrogen fertilizer can be reduced by 10%. However, in the process of measuring, it is better to use the control group to carry out the test, which can ensure the accuracy of the measurement results, and the reason for this is that the measurement process will be affected by many aspects, the nitrogen in the soil, Phosphorus, potassium, lead, cadmium, salinity, etc. all affect the accuracy of the measurement. Therefore, when using the handheld chlorophyll meter to measure, the control group can do its best to avoid the above problems.
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