Organic amendments and their impact on arthropod diversity in rice (<i>Oryza sativa</i> L.) fields of Hyderabad, India
Keywords:
Vermicompost, Poultry manure, Neem cake, Predator, Parasitoid, Phytophage, Diversity indicesAbstract
Organic manuring influences the diversity of arthropods and their functional significance in rice fields. Arthropod diversity under eight organic manure regimes consisting of farmyard manure (FYM), vermicompost (VC), poultry manure (PM), neem cake (NC), FYM + 50% recommended fertilizer dose (50%RFD), VC+50% RFD, RFD, and unfertilized control (UC) was assessed in a randomized block design experiment. The doses of organic amendments were adjusted to give the recommended level of 120 kg N ha–1. Arthropod sampling was carried out by sweep-nets, vacuum sampling, and straining. Higher abundance of arthropods was observed in plots treated with VC and NC with the spider Tetragnatha sp. being the dominant species. Simpson’s index indicated that the maximum diversity was observed in PM treated plots (0.022) while the least was in RFD plots (0.183).Downloads
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