Vol. 60, 2021
A Soil Nematode Community Response to Reclamation of Salinized Abandoned FarmlandLei Yang1, Fenghua Zhang1,*, and Yanqin Luo1
Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and
Construction Corps, Shihezi University, Shihezi, Xinjiang, 832003,
China. Correspondence: E-mail: email@example.com (Zhang)
Received 13 May 2021 / Accepted 20
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 focused on how reclamation affected 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 the 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 Shannon index in the
10-20 cm soil layer. Reclamation significantly increased Simpson index
in the 0-10 cm soil layer, while the change of value in the 10-20 cm
soil layer was opposite. High basal index and fungal-based channel were
found in the control. Total nematodes 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
varied 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 became mature 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.
Yang L, Zhang FH, Luo YQ. 2021. A soil nematode community response to
reclamation of salinized abandoned farmland. Zool Stud 60:72.
Supplementary materials: Table S1