Chlorophyll analyzer for strawberry nitrogen diagnosis and nitrogen fertilizer recommended
Nitrogen fertilizer is the largest fertilizer used by crops and it is the most direct way to increase strawberry production. In a certain range, the yield of strawberries increases significantly with the increase in the use of nitrogen fertilizers. However, the continued heavy use of nitrogen fertilizers will also cause the waste of nitrogen fertilizers, and even cause irreversible effects on the soil properties, resulting in deterioration of the ecological conditions of the ground. Pollution and a series of environmental issues. Chlorophyll content in the determination of plant chlorophyll content of the function, but also can provide nitrogen fertilizer content data to guide the application of nitrogen fertilizer.
This year, more and more studies have been conducted to monitor the nitrogen content of plants through chlorophyll content, and they have been successfully applied to rice, wheat, cotton and vegetables, and the chlorophyll content analyzer is subject to the characteristics of simplicity, rapidity, and non-destructiveness. Extensive researcher's blitz. There is an instrument in the chlorophyll content meter, which determines the chlorophyll content by measuring the SPAD value. This instrument is compact in appearance and can be carried around. It is also called a handheld chlorophyll meter. The handheld chlorophyll meter measures the relative content of chlorophyll in the current leaf by measuring the absorption of leaves in two wavelength bands. In specific experiments, we often randomly select five functional leaves with the same growth potential, measure the chlorophyll meter readings, and record the average value as the leaf chlorophyll content. In addition, the handheld chlorophyll meter only needs to insert the blade and close the measuring probe, and it is not necessary to cut the blade, so that the specific blade can be monitored throughout the growth process of the crop, so that a more scientific analysis result can be obtained. .
The results showed that the chlorophyll content of strawberry leaves increased with the increase of soil inorganic nitrogen, plant total nitrogen, and leaf nitrate content. That is to say, there was a significant linear correlation between SPAD values ​​and the above indicators. Therefore, the plant's nitrogen nutrition levels can be diagnosed by SPAD values. In addition, the SPAD value can reflect the strawberry yield to a certain extent, and the chlorophyll content meter can also preset the final yield of the strawberry. Of course, the most important thing is that the chlorophyll content meter can determine the nitrogen content of strawberry plants, and then guide the application of nitrogen fertilizer to achieve the purpose of high yield and high quality.
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