Estimation of Relationship between Chlorophyll Content and Nitrogen in Rape

Estimation of Relationship between Chlorophyll Content and Nitrogen in Rape
Rapeseed is the most important oil crop in China. Its area and total production accounts for about 30% of the world's rapeseed area and total production. They all rank first in the world, and its product, rapeseed, is an important vegetable oil. Its quality is mainly affected by chlorophyll. The effect of the content, however, was confirmed by the use of a chlorophyll meter, and there was a certain relationship between chlorophyll content and nitrogen in the soil.
The curve was drawn by using the chlorophyll detector to determine the relationship between the paddiness of the 20 groups of rapeseed and the nitrogen content in the plant. The relationship between the two is as follows:

The linear relationship between the SPAD value and the N content of oilseed rape leaf is r=0.862 after fitting, then the mathematical relation model between SPAD value and N can be expressed by the following formula: y=0.3923x-0.4702
Therefore, a chlorophyll meter was used to measure the padding value in the rape leaf, and then the nitrogen deficiency was calculated by using the above formula to perform reasonable fertilization. Through experiments, using the chlorophyll meter to measure nitrogen fertilizers scientifically can reduce the use of 10% nitrogen fertilizers without reducing the yield of crops, reduce the application amount of nitrogen fertilizers, and improve the quality of crops.
In the use of chlorophyll meter to understand the absence of nitrogen, it should be noted that the coefficient is different between different varieties of the same crop. When measuring, the coefficient of that species must be measured before it can be used, so that it can be guaranteed. Accuracy of measurement results.