[Influence of fungi-feeding nematodes on soil functional stability under heat or copper stress].
In a microcosm experiment, the effects of the interaction between soil fungi-feeding nematodes and microorganisms on the soil functional stability under persistent stress of CuSO4 or transient stress of heating to 40 degrees C for 18 h were studied, with the short-term decomposition of barley leaf powder as a representative of soil function. The results showed that whether the stress existed or not, inoculation of fungi-feeding nematodes could enhance soil basal respiration, an overall indicator of soil microbial activity. Under copper stress, the soil basal respiration after the inoculation increased significantly during the period from the 8th day to the end of the experiment (P < 0.05); while under heat stress, the promotion effect of the inoculation was only significant at the 8th day of the experiment, suggesting that the influence of fungi-feeding nematodes on soil microorganisms varied with stress type. Under the two stresses, inoculation of fungi-feeding nematodes had no influence on the resistance of soil function but could promote its recovery, and the soil fungal biomass in the late period of the experiment was lower in the treatment of inoculation than in CK, indicating that under stress condition, fungi-feeding nematodes depressed the growth and development of soil fungi, and possibly, indirectly promoted bacterial development.
Chen
Shi
S
College of Resources & Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China. 2006103079@njau.edu.cn
Chen
Xiao-Yun
XY
Li
Hui-Xin
HX
Hu
Feng
F
Liu
Man-Qiang
MQ
D000818:Animals; D003300:Copper / Q000032:analysis*; D017753:Ecosystem; D005658:Fungi / Q000254:growth & development; D001467:Hordeum / Q000378:metabolism; D006358:Hot Temperature; D009348:Nematoda / Q000502:physiology*; D012987:Soil / Q000032:analysis / Q000469:parasitology*; D012988:Soil Microbiology
D012987:Soil; D003300:Copper