Soil microbial community structure based on indicator lipids (n·mol g⁻¹ soil) from the four sites.

<p>Soil microbial community structure based on indicator lipids (nmol g⁻¹ soil) from the four sites</p><p>^a SS: pure <i>Hippophae rhamnoides</i> plantation; SY: mixed plantation with <i>Hippophae rhamnoides</i> and <i>Pinus tabulaeformis</i>; SB: mixed plantation with <i>Hippophae rhamnoides</i> and <i>Platycladus orientalis</i>; SC: mixed plantation with <i>Hippophae rhamnoides</i> and <i>Robinia pseucdoacacia</i>.</p><p>^b Total lipid was the sum of the 31 detected fatty acids.</p><p>^c The values were the means of three replicates. Different letters within columns indicate significant differences at <i>p</i> < 0.05 levels through the LSD test.</p><p>^d G⁺ and G⁻ represent gram-positive and gram-negative bacteria, respectively. G⁺/G⁻ was the ratio of the sum of gram-positive bacteria to the sum of gram-negative bacteria.</p><p>^e Standard deviation.</p><p>Soil microbial community structure based on indicator lipids (n·mol g⁻¹ soil) from the four sites.