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• W2087235389 abstract "In the system of “aerobic rice”, especially adapted aerobic rice varieties are grown under non-flooded conditions in non-puddled and aerobic soils with supplemental irrigation and moderate external inputs. Limited research has been done so far on optimizing nutrient management to produce high yields. In this study, we investigated yield formation and dry matter translocation of aerobic rice cultivar HD297 in response to N application, grown under different irrigation regimes at two sites close to Beijing, North China. At the “experimental farm”, the groundwater table depth was 0.2–1 m; at the “experimental station”, it was deeper than 2 m. Fertilizer-N rates were 0, 75, and 150 kg N ha−1 applied in split dressings according to regional recommendations for lowland rice, with 30% being applied at sowing, 40% at tillering, and 30% at panicle initiation. The application of N increased grain yields from 3.4 to 4.4 t ha−1. There was no interaction between N rates and water management, and no effect of water treatment on the grain yield. Before anthesis, dry matter accumulation increased with N application, but after anthesis, it decreased with increasing N application. With high N applications, grain filling was limited by a low contribution of post-anthesis assimilates. This indicates that traditional lowland rice fertilizer application schedules are not suitable for aerobic rice. N rate and timing of N fertilizer should be adjusted to balance crop's demand before and after anthesis. Reducing N before anthesis and applying N at anthesis is necessary to increase post-anthesis dry matter accumulation and finally grain yield. Furthermore, germplasm improvement is suggested to increase the translocation of dry matter to grain for increasing grain yield. On average, yield was 14% higher at the “experimental farm” than at the “experimental station”. Differences in crop growth and Mn uptake between the farm and the station mainly resulted from the difference in hydrology. In target areas for aerobic rice with a deep groundwater table more research is needed to determine whether Mn deficiency is a potential cause of yield suppression of aerobic rice." @default.
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• W2087235389 date "2009-10-01" @default.
• W2087235389 modified "2023-09-28" @default.
• W2087235389 title "Response of aerobic rice growth and grain yield to N fertilizer at two contrasting sites near Beijing, China" @default.
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• W2087235389 doi "https://doi.org/10.1016/j.fcr.2009.07.001" @default.
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