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为了探讨“盐岛”和“肥岛”效应影响下盐碱土的养分特征,对黄河三角洲盐碱地柽柳植株周围不同土层的pH值、电导率和碳氮磷含量及其生态化学计量学特征进行了研究.结果表明:土壤pH和电导率均随土层的加深而升高,0~20 cm土层土壤电导率随离植株距离的增加而降低,全磷含量则升高.20~40 cm土层土壤有机碳、全氮、N/P和C/P随离柽柳植株距离的增加而降低,C/N则升高.随着土层的加深,有机碳和全氮均呈降低趋势,而全磷则先降低后升高.土壤pH与电导率呈显著正相关,且二者与土壤碳氮磷及其生态化学计量比之间均呈显著负相关.
In order to investigate the nutrient characteristics of saline-alkali soil under the influence of “Salt Island” and “Fertile Island” effects, the pH value, conductivity and content of carbon, nitrogen and phosphorus in different soil layers around Tamarix and shrubs in the saline-alkali soil of the Yellow River Delta and their ecological stoichiometry The results showed that soil pH and conductivity all increased with the deepening of soil depth, soil electrical conductivity of 0-20 cm soil layer decreased with increasing distance from plant and total phosphorus content increased.20 Soil organic carbon, total nitrogen, N / P and C / P of ~ 40 cm soil layer decreased with the increase of the distance from Tamarix and C / N, but increased with the increase of soil depth While the total phosphorus decreased firstly and then increased.The soil pH had a significant positive correlation with the conductivity, and there was a significant negative correlation between the two and soil carbon, nitrogen, phosphorus and its ecological stoichiometry.