Effects of intercropping with Atractylodes lancea and application of bio-organic fertiliser on soil invertebrates, disease control and peanut productivity in continuous peanut cropping field in subtropical China

摘要

The consecutive monoculturing of peanut seriously affects its yield and quality in the red soil regions of southern China. Different control measures for consecutively monocultured peanut fields should be explored to ensure the sustainable development of the local peanut industry. In this study, the influence of two different regimes, the intercropping of peanut with Atractylodes lancea and the furrow application of bio-organic fertiliser (BOF), on the community composition of soil invertebrates, the severity of peanut disease and peanut productivity was evaluated in an upland region where peanut had been monocropping for 5 years. We found that intercropping with A. lancea and the furrow application of BOF significantly changed the community composition of soil invertebrates and increased their biodiversity, as estimated by the Shannon and Simpson indices. Intercropping with A. lancea significantly reduced the proportion of Collembola, such as Tullbergia, Onychiurus, Folsomia and Folsomina, while the furrow application of BOF significantly increased the abundance of Collembola, such as Isotomidae compared with conventional monoculture. The intercropping significantly increased the proportion of Acarina, such as Mesostigmata and Oribatida, whereas the furrow application of BOF did not increase this proportion compared to conventional monoculture. The intercropping and application of BOF significantly reduced the damping-off in seedling and root rot disease at the maturation stage and increased peanut yield. The leaf spot disease of peanut was significantly suppressed by the intercropping but not by the application of BOF. The results of the study suggested that the intercropping of peanut with A. lancea and the furrow application of BOF could effectively relieve the problems associated with consecutive monoculture of peanut in the red soil regions of southern China.