Seasonal Variation Characteristics of C, N, and P Stoichiometry and Water Use Efficiency of Messerschmidia sibirica and Its Relationship With Soil Nutrients

The seasonal dynamic characteristics of C, N, and P stoichiometry water use efficiency (WUE) Messerschmidia sibirica the soil in Yellow River Delta (YRD) were studied. correlations stoichiometric WUE between organs M. analyzed. results showed that: (1) contents their ratios various varied with seasons. dynamics leaf N:P that degree nutrient restriction by N decreased July increased September. (2) P, as well ratio, a high correlation throughout growing season, showing significantly positive among lowest root. (3) C 13 stable isotope analysis May was higher than other months (July September). had content negative C:N, indicating can compensate for decline through improvement WUE. structural equation model (SEM) affected joint effect season WUE, mainly directly (4) Redundancy (RDA) main factors affecting variation . This study is helpful to deeply understand adaptive mechanism plant use, which provides theoretical basis vegetation protection restoration area.