title: Integration of crop rotation and arbuscular mycorrhiza (AM) inoculum application for enhancing AM activity to improve phosphorus nutrition and yield of upland rice (Oryza sativa L.).
abstract: Upland rice (Oryza sativa L.) is a major crop of Eastern India grown during the wet season (June/July to September/October). Aerobic soils of the upland rice system, which are acidic and inherently phosphorus (P) limiting, support native arbuscular mycorrhizal (AM) activity. Attempts were made to improve P nutrition of upland rice by exploiting this natural situation through different crop rotations and application of AM fungal (AMF) inoculum. The effect of a 2-year crop rotation of maize (Zea mays L.) followed by horse gram (Dolichos biflorus L.) in the first year and upland rice in the second year on native AM activity was compared to three existing systems, with and without application of a soil-root-based inoculum. Integration of AM fungal inoculation with the maize-horse gram rotation had synergistic/additive effects in terms of AMF colonization (+22.7 to +42.7%), plant P acquisition (+11.2 to +23.7%), and grain yield of rice variety Vandana (+25.7 to +34.3%).
authors: Central Rainfed Upland Rice Research Station, (Central Rice Research Institute, ICAR), PB 48, Hazaribag, 825 301, Jharkhand, India. dipankar_maiti@live.in.
authors: Dipankar
authors: D
authors: Maiti
authors: Central Rainfed Upland Rice Research Station, (Central Rice Research Institute, ICAR), PB 48, Hazaribag, 825 301, Jharkhand, India.
authors: Neha Nancy
authors: NN
authors: Toppo
authors: Central Rainfed Upland Rice Research Station, (Central Rice Research Institute, ICAR), PB 48, Hazaribag, 825 301, Jharkhand, India.
authors: Mukund
authors: M
authors: Variar
mesh_terms: D059827:Agricultural Inoculants / Q000254:growth & development* / Q000378:metabolism; D000383:Agriculture / Q000379:methods*; D031294:Dolichos / Q000254:growth & development; D055137:Glomeromycota / Q000254:growth & development* / Q000378:metabolism; D007194:India; D038821:Mycorrhizae / Q000254:growth & development* / Q000378:metabolism; D012275:Oryza / Q000254:growth & development / Q000378:metabolism* / Q000382:microbiology*; D010758:Phosphorus / Q000378:metabolism*; D012988:Soil Microbiology; D003313:Zea mays / Q000254:growth & development
chemical_list: D010758:Phosphorus