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• W4294131792 endingPage "2092" @default.
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• W4294131792 abstract "The no-tillage, direct-seeded (NTDS) rice cropping system has attracted considerable attention because of its social, economic, and environmental benefits. However, very limited research has been conducted on optimizing nitrogen (N) management practices to enhance grain yield and N use efficiency (NUE) of rice grown in NTDS. An N fertilization field experiment with two rice hybrids was conducted in 2020 and 2021; the experiment consisted of three N rates (180, 153, and 0 kg N ha−1; N180, N153, and N0, respectively) and two N-application ratios split among the basal, seedling (three-leaf stage), mid-tillering, and panicle initiation stages (50%, 0%, 30%, and 20% and 0%, 30%, 40%, and 30%; R1 and R2, respectively). Although the N rate was 15% lower in the N153 treatment than in the N180 treatment, grain yield for N153 was equal to or slightly higher than that for N180. N153 had a higher agronomic efficiency of applied N (AEN), partial factor productivity of applied N (PFPN), and recovery efficiency of applied N (REN) compared to N180 by 10.1–24.7%, 15.0–20.1%, and 1.8–12.6%, respectively. Grain yield, AEN, PFPN, and REN in R2 were higher than those in R1 by 0.8–4.6%, 2.4–19.7%, 0.7–4.6%, and 3.5–30.0%, respectively. The increase in grain yield was due to improvement in the sink size that resulted from larger panicles, higher biomass production at maturity, which was partially attributable to increased biomass accumulation after heading, and a higher harvest index. Our results suggest that it is feasible to simultaneously improve grain yield and NUE in hybrid rice under NTDS through delayed and reduced N application rate, and current breeding programs need to target large panicle size as a primary objective for NTDS rice." @default.
• W4294131792 created "2022-09-02" @default.
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• W4294131792 date "2022-09-01" @default.
• W4294131792 modified "2023-09-26" @default.
• W4294131792 title "Delaying Application and Reducing the N Rate Enhances Grain Yield and N Use Efficiency in No-Tillage, Direct-Seeded Hybrid Rice" @default.
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• W4294131792 doi "https://doi.org/10.3390/agronomy12092092" @default.
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