Soil microbial metabolic strategies and the imbalance between available phosphorus and nitrogen controls the rhizosphere priming effect by grassland tumbleweed (Cleistogenes squarrosa and Saposhnikovia divaricata) root exudates

The original data include:
(a) the simulated root exudation test included five treatments: (1) a control without root exudation or water; (2) an amount of H2O equal to the volume of the exudates, (3) the exudates of L. chinensis; (4) the exudates of C. squarrosa; and (5) the exudates of S. divaricata.
(b) Each experimental treatment is further divided into four grazing sub-treatments: NG, no grazing; LG, light grazing; MG, moderate grazing; HG, heavy grazing
(c) The sampling times were on the 3rd day, the 10th day and the 21st day of the cultivation.
(d) Abbreviations: AMF, arbuscular mycorrhizal fungi; CUE, microbial carbon use efficiency; DOC, dissolved organic carbon; F: B, ratio of total fungi phospholipid fatty acids (PLFAs) to total bacterial PLFAs; G-, Gram-negative bacteria; G+, Gram-positive bacteria PLFAs; Nmin, nitrogen mineralization efficiency; NG, no grazing; LG, light grazing; MG, moderate grazing; HG, heavy grazing; Olsen P, available phosphorus; POlsen: Navailable, ratio of available phosphorus to available nitrogen; SOC, soil organic carbon; TOC/TN, the total organic carbon to total soluble nitrogen ratio; Vangle, Vector angle; Vlength, Vector length.