[Effect of afforestation modes on soil microbial community and nitrogen functional genes in Hippophae rhamnoides plantation].
The study aimed to assess the effect of different afforestation modes on microbial composition and nitrogen functional genes in soil. Soil samples from a pure Hippophae rhamnoides stand (SS) and three mixed stands, namely, H. rhamnoides and Pinus tabuliformis (SY), H. rhamnoides and Platycladus orientalis (SB), H. rhamnoides and Robinia pseucdoacacia (SC) were selected. The results showed that the total PLFA (TPLFA), bacterial PLFA, gram positive bacterial PLFA (G⁺PLFA) were significantly higher in soil samples from other three stands than those of the pure one. However, no significant difference was found for fungal PLFA among them. The abundance of nifH, amoA, nirK and narG genes were higher in SY and SC than in SS. The TPLFA, G⁺PLFA, gram negative bacterial PLFA (G⁻PLFA), and all of the detected gene abundance were significantly and positively correlated with soil pH, total organic carbon, total nitrogen, ammonium nitrogen and available potassium. Afforestation modes affected indirectly soil microbial composition and functional genes through soil properties. Mixing P. tabuliformis or P. orientalis with H. rhamnoides might be suitable afforestation modes, which might improve soil quality.
Dan
D
Yang
Xuan
X
Yu
Xu
X
Liu
Jin-liana
JL
Liu
Shun-xiang
SX
Zhang
Ze-qun
ZQ
Yu
D064751:Ammonium Compounds / Q000032:analysis; D001419:Bacteria / Q000235:genetics; D002244:Carbon / Q000032:analysis; D065928:Forests; D005658:Fungi; D005798:Genes, Bacterial; D031281:Hippophae / Q000382:microbiology*; D009584:Nitrogen / Q000032:analysis*; D028223:Pinus; D011188:Potassium / Q000032:analysis; D031301:Robinia; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology
D064751:Ammonium Compounds; D012987:Soil; D002244:Carbon; D009584:Nitrogen; D011188:Potassium