氮、硫沉降下邓恩桉土壤与植株养分特征关系研究

his article designs 16 patterns to simulate the effects of nitrogen and sulfur complex deposition on soil total quantity elements, soil effective elements, tree branches nutritions and tree leaves nutritions of young forest plots of EuCahetus dunnii, exploring the relationship between soil and plant nutrient characteristics by the method of typical correlation analysis. The results show that the first canonical correlation coefficient(r=0.9633) between Soil total quantity elements and Soil effective elements is significant. This illustrates that soil total quantity elements have certain influence on Soil effective elements. And the main relationship between soil total quantity elements and soil effective elements concentrate on the positive correlation between soil organic matter and soil exchange aluminum, because the absolute value of X4 coefficient about U1 is greatest (X4=0.4533) and absolute value of Y5 coefficient about V1 is the greatest (Y5=4.1306). The first canonical correlation coefficients(r=0.9963) among soil total quantity elements, soil effective elements, leaf nutrition elements is significant. This means that soil total quantity elements and soil effective elements have certain influence on leaf nutrient elements. And the main relationship among soil total quantity elements, soil effective elements and leaf nutrient elements concentrate on the negative correlation between soil exchange aluminum and leaf calcium, because the absolute value of X9 coefficient about U1 was greatest(X9=12609.81) and absolute value of Y3 coefficient about V1 was greatest(Y3=-0.7404). The first canonical correlation coefficients(r=1) among soil total quantity elements, soil effective elements and branch nutrient elements is significant. This means that soil total quantity elements, soil effective elements have certain influence on branch nutrient elements. And the main relationship among soil total quantity elements, soil effective elements and branch nutrition elements concentrate on the negative correlation between soil exchange aluminum and branch potassium, because the absolute value of X9 coefficient about U1 was greatest(64.0683) and absolute value of Y4 coefficient about V1 was greatest(-0.8676). The first canonical correlation coefficients(r=0.9427) between leaf nutrient elements and branch nutrient elements is significant. This means that leaf nutrient has certain influence on branch nutrient elements. And the main relationship between leaf nutrient elements and branch nutrient elements concentrate on the positive correlation between leaf magnesium and branch potassium, because the absolute value of X4 coefficient about U1 was greatest (0.4781) and absolute value of Y4 coefficient about V1 was greatest (0.7843). This article studies the relationship between soil and plant nutrient characteristics under the deposition of nitrogen and sulfur, which provides the reasonable theoretical basis for scientific management and prevention scheme of EuCahetus dunnii under the circumstance of the increase of acid deposition.