Vol. 60, 2021
(update: 2021.10.12; 12.07)
A Soil Nematode Community
Response to Reclamation of Salinized Abandoned Farmland
Lei Yang1, Fenghua
Zhang1,*, and
Yanqin Luo1
doi:10.6620/ZS.2021.60-72
1The
Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and
Construction Corps, Shihezi University, Shihezi, Xinjiang, 832003,
China. Correspondence: E-mail: zhangfenghua6088@126.com (Zhang)
E-mail: yanglei24@163.com (Yang); 627102636@qq.com (Luo)
Received 13 May 2021 / Accepted 20
September 2021
Communicated by Benny K.K. Chan
Development from abandoned land to
farmland after vegetation reestablishment for reclamation is an
important salinization rehabilitation process in dryland ecosystems.
While subsequent soil abiotic changes have been reported, few studies
have focused on how reclamation affects the soil biota. Understanding
the response of soil biota to reclamation is useful for evaluating the
effect of agricultural management. We
investigated soil physiochemical properties, the composition and
structure of nematode communities, and nematode metabolic footprints in
control and reclaimed farmland. The results showed that soil properties
were significantly altered by reclamation. In particular, reclamation
significantly increased pH, organic carbon, total nitrogen, and
microbial biomass carbon. Conversely, electrical conductivity was
significantly
decreased. Shannon and Simpson indices were affected by reclamation.
Reclamation significantly increased the Shannon index in the 10–20 cm
soil layer. Reclamation significantly increased the Simpson index in
the 0–10 cm soil layer, while the opposite was observed in the 10–20 cm
soil layer. High basal index and fungal-based channel were found in the
control. Total nematode abundance increased due to
reclamation, which included fungivores, herbivores, and
omnivores-predators. More nematodes could store more biomass carbon in
the reclaimed farmland. Reclamation had an effect on the structure and
function of soil food web, and increased the metabolic footprints of
various trophic groups of nematodes. Nematode faunal analysis revealed
that exogenous substances input led to the high level of communities
structure, and the soil food web matured in the reclaimed farmland. The
nematode communities were affected by reclamation. Furthermore, pH, EC,
SOC, TN, and MBC were key driving factors affecting the nematode
communities. Therefore, reclamation could effectively enhance the
structure and function of soil food web through bottom-up effects in
the cotton fields in Xinjiang, China.
Key words: Faunal analysis,
Metabolic footprint, Soil food web, Soil health, Land use.
Citation:
Yang L, Zhang FH, Luo YQ. 2021. A soil nematode community response to
reclamation of salinized abandoned farmland. Zool Stud 60:72. doi:10.6620/ZS.2021.60-72.
Supplementary
materials: Table
S1
|