Impacts of Fallow Conditions, Compost and Silicate Fertilizer on Soil Nematode Community in Salt–Affected Paddy Rice Fields in Acid Sulfate and Alluvial Soils in the Mekong Delta, Vietnam

Avoidance of intensive rice cultivation (IRC) and soil amendments are potential practices to enhance properties. There is only limited information on the effects reduced IRC its mixture with compost or silicate fertilizer (Si) nematode community in salt–affected soils. This study aimed assess shifts by reducing a crop from triple system (RRR) double mixed Si paddy fields acid sulfate (ASS) alluvial (AL) Mekong Delta, Vietnam. Field experiments were designed four treatments replicates, including RRR proposed double–rice followed fallow (FRR) 3 Mg ha–1 crop−1 100 kg Si. Soils collected at harvest after 2 year experiment, reflecting fifth third consecutive FRR system, respectively. Results showed that gave significant reduction abundance plant–parasitic nematodes (PPN), dominated Hirschmanniella increased bacterivorous when ASS. In addition, biodiversity Hill’s indices herbivorous footprint Proposed having had strongly omnivorous footprints. Particularly, Rhabdolaimus, Mesodorylaimus Aquatides, metabolic footprints (structure footprint, bacterivorous, predator) diversity N1 index Our results highlighted was beneficial practice for decreasing PPN salt-affected soils increasing FLN structuring communities biodiversity, trophic structure,