Study on Chlorophyll Content of Crops by Canopy Chlorophyll Analyzer
During the growth and development of crops, and in the formation of yield and quality, the most significant nutrient elements are nitrogen. Moreover, nitrogen is involved in the composition of chlorophyll and it is also a major component of proteins. The abundance of nitrogen is closely related to the chlorophyll content in crop leaves. Numerous studies have been conducted to predict wheat grain quality by detecting leaf and plant nitrogen and chlorophyll during crop growth. The canopy chlorophyll meter determines the relative chlorophyll content of the leaf by measuring the light transmittance of the leaf in two wavelength ranges and is widely used in crop nitrogen management and crop quality prediction studies.
The correlation between leaf SPAD data and leaf nitrogen content in wheat was better than the correlation with canopy nitrogen density, and the correlation between chlorophyll fluorescence parameters SFR_G and SFR_R and canopy nitrogen density was better than the leaf nitrogen content. The correlation shows that the chlorophyll information obtained from the canopy chlorophyll analyzer can reflect the activity of individual crops. The chlorophyll fluorescence information of crop canopy obtained from the Multiplex3 measuring instrument more reflects the activity of the crop population.
Canopy chlorophyll determination instrument found that chlorophyll fluorescence parameters are mostly used to evaluate crop photochemical reactions. This study uses winter wheat chlorophyll fluorescence parameters for wheat quality prediction, research obtained by different growth stages of winter wheat leaf SPAD values ​​and canopy chlorophyll fluorescence parameters SFR_G, SFR_R The relationship between relevant parameters and wheat leaf nitrogen, canopy nitrogen density, and grain protein content at maturity was studied. The results showed that the correlation between wheat canopy nitrogen density and grain protein content was better than that of leaf during the early greening stage of winter wheat till the grain filling stage. The correlation between nitrogen content and protein content, and the correlation between grain filling and grain protein content in the middle grain filling period were not significant; the correlation between wheat canopy nitrogen density and wheat grain protein yield was higher than that between leaf nitrogen content and protein yield. Sexual trends.
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