Effect of Abiotic Stresses on the Nondestructive Estimation of Rice Leaf Nitrogen Concentration

Figure 5

Seasonal dynamic of area-based leaf chlorophyll concentration (Ch_a) and leaf N concentration (N_a) for all treatments. Stress treatments applied were drought (–W), salinity (+Sal), sulfur deficiency (–S), and phosphorus deficiency (–P). Shown are mean treatment values for three replications and all varieties used because no significant interaction was detected. Significance levels for treatment (T) effects and treatment by sampling time interaction (T×S) are ns = 𝑃>.05;^∗∶.05≤𝑃≤.01;^∗∗∶.01≤𝑃≤.001;^∗∗∗∶𝑃<.001 (further details in Tables 3 and 4).

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