ABSTRACT

Surface-dwelling beetles offer ecosystem services in agro-ecosystems including biological pest control and organic matter decomposition. This study was conducted to investigate beetle community response to six years of tillage, crop residue application, crop rotation and soil fertility amendments (low fertiliser, high fertiliser, manure, manure + low fertiliser and manure + 60 kg N ha⁻¹) treatments. Reduced tillage increased beetle abundance by 4.6% relative to soil inversion tillage. Crop residue application increased the abundances of Platynus assimilis, Zophosis boei and total beetles by two to three times. Meanwhile, Renatiella reticulata increased by 628.6% in high fertiliser compared to manure + 60 kg N ha⁻¹, manure + low fertiliser and the control. In crop rotation + crop residue retention plots, application of sole manure at 10 t ha⁻¹ increased the Shannon index by 360–365% relative to manure + 60 kg N ha⁻¹ and manure + low fertiliser. Based on the findings in this study, it can be concluded that reduced tillage, retention of crop residues on the soil surface and application of manure increase surface-dwelling beetle abundance and diversity.

摘要

地表甲虫在农业生态系统中提供生态系统服务，包括生物害虫控制和有机物分解。本研究旨在调查甲虫群落对六年耕作、作物残留物施用、轮作和土壤肥力改良（低施肥、高施肥、粪肥、粪肥 + 低施肥和粪肥 + 60 kg N ha ^-1）处理的响应。相对于土壤反转耕作，减少耕作使甲虫丰度增加了 4.6%。施用作物残留物使Platynus assimilis、Zophosis boei和总甲虫的丰度增加了2-3 倍。同时，与粪肥 + 60 kg N ha ^-1相比，Renatiella reticulata在高肥下增加了 628.6%、粪肥+低肥控制。在轮作 + 作物残留物保留地块中，相对于粪肥 + 60 kg N ha ^-1和粪肥 + 低肥料，施用10 t ha ^-1的单一粪肥使香农指数增加了 360-365% 。根据本研究的结果，可以得出结论，减少耕作、将作物残留物保留在土壤表面和施用粪肥会增加地表甲虫的丰度和多样性。