祁连山典型灌丛植物根系化学计量特征及其与土壤理化因子的关系

为了揭示植物根系养分含量及其化学计量特征与土壤因子之间的关系,选择祁连山大野口流域的甘青锦鸡儿(Caragana tangutica)、鲜黄小檗(Berberis diaphana)、金露梅(Potentilla fruticosa)、鬼箭锦鸡儿(Caragana jubata)和吉拉柳(Salix gilashani...

Root Stoichiometric Characteristics of Typical Shrubs and Their Correlation with Soil Physicochemical Factors in Qilian Mountain

Understanding the relationship between plant root nutrient content and its stoichiometry and soil factors is of great significance for understanding nutrient utilization strategies and material cycling of plant communities in alpine mountainous areas.Taking the five typical shrubs of Caragana tangutica, Berberis diaphana, Potentilla fruticose, Caragana jubata and Salix gilashanica,which distributed in Dayekou watershed of Qilian Mountain as the research objects, the stoichiometric characteristics of coarse and fine roots of five typical plants were studied, and the relationship between stoichiometric characteristics and soil physical and chemical factors was explored. The results showed that the average contents of C, N and P in coarse roots and fine roots were 569.55, 7.86, 1.02 g/kg and 541.38, 8.61, 1.10 g/kg, respectively. The C/N, C/P and N/P of coarse roots and fine roots were 86.63, 729.78, 9.77 and 71.34, 527.61, 8.11, respectively. The contents of C and P were higher than the average level of Chinese plant roots, while the N content of coarse roots was higher than the average level of Chinese plant coarse roots, but the N content of fine roots was lower than the average level of Chinese plant fine roots. Redundancy analysis showed that soil available phosphorus content and soil mass water content were the main soil factors affecting the stoichiometric characteristics of coarse roots, while soil available phosphorus content and soil pH value were the main soil factors affecting the eco stoichiometric characteristics of fine roots.