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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
16/04/2021 |
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Data da última atualização: |
10/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOLLATO, R. P.; JAENISCH, B. R.; SILVA, S. R. |
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Afiliação: |
ROMULO P. LOLLATO, Dep. of Agronomy, Kansas State Univ., 2004 Throckmorton Bld., 1712 Claflin Rd., Manhattan, KS 66506, USA; BRENT R. JAENISCH, 1 Dep. of Agronomy, Kansas State Univ., 2004 Throckmorton Bld., 1712 Claflin Rd., Manhattan, KS 66506, USA; SERGIO RICARDO SILVA, CNPT. |
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Título: |
Genotype-specific nitrogen uptake dynamics and fertilizer management explain contrasting wheat protein concentration. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Crop Science, p. 1-19, Dec. 2021. |
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DOI: |
10.1002/csc2.20442 |
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Idioma: |
Inglês |
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Conteúdo: |
Increasing yield and grain protein concentration (GPC) in wheat (Triticum aestivum L.) without excessive nitrogen (N) rates requires increasing N use efficiency (NUE, yield per available N). We assessed the effects of N rate and timing on yield, GPC, and N nutritional indices of two winter wheat genotypes with similar yield but contrasting GPC. Factorial field experiments evaluated the wheat genotypes ?LCS Chrome? (high GPC) and ?WB?Grainfield? (low GPC), three N rates, and four N timings (?Fall?, 100% of N rate applied at Zadoks GS20; ?Spring?, 100% at GS25; ?Split?, 40% Fall plus 60% Spring; and ?Anthesis?, 40% fall, 50% spring, and 10% at GS61) in six Kansas environments. Yield ranged from 2,853 to 8,023 kg ha-1 and GPC from 88 to 152 g kg-1. Fall and spring N timing had the lowest and greatest yield difference from the zero-N control and showed linear, linear-plateau or no responses to N rate. ?LCS Chrome? had 5 to 19 g kg-1 greater GPC than ?WB?Grainfield?, which was associated with greater post-anthesis N uptake (24 vs 15% of maturity-N uptake), a greater spike N gain between anthesis and maturity (7.4 vs 6.5 g m-2), and greater N recovery efficiency (0.34 vs 0.28 kg kg-1). Greater N rates and Anthesis or Spring N timings increased GPC. The NUE (range: 20?311 kg kg-1) was inversely related to N availability, and Fall N timing had the lowest NUE. Our results highlighted physiological reasons for genotype-specific GPC performance and suggested agronomic opportunities to simultaneously improve wheat yield and GPC. MenosIncreasing yield and grain protein concentration (GPC) in wheat (Triticum aestivum L.) without excessive nitrogen (N) rates requires increasing N use efficiency (NUE, yield per available N). We assessed the effects of N rate and timing on yield, GPC, and N nutritional indices of two winter wheat genotypes with similar yield but contrasting GPC. Factorial field experiments evaluated the wheat genotypes ?LCS Chrome? (high GPC) and ?WB?Grainfield? (low GPC), three N rates, and four N timings (?Fall?, 100% of N rate applied at Zadoks GS20; ?Spring?, 100% at GS25; ?Split?, 40% Fall plus 60% Spring; and ?Anthesis?, 40% fall, 50% spring, and 10% at GS61) in six Kansas environments. Yield ranged from 2,853 to 8,023 kg ha-1 and GPC from 88 to 152 g kg-1. Fall and spring N timing had the lowest and greatest yield difference from the zero-N control and showed linear, linear-plateau or no responses to N rate. ?LCS Chrome? had 5 to 19 g kg-1 greater GPC than ?WB?Grainfield?, which was associated with greater post-anthesis N uptake (24 vs 15% of maturity-N uptake), a greater spike N gain between anthesis and maturity (7.4 vs 6.5 g m-2), and greater N recovery efficiency (0.34 vs 0.28 kg kg-1). Greater N rates and Anthesis or Spring N timings increased GPC. The NUE (range: 20?311 kg kg-1) was inversely related to N availability, and Fall N timing had the lowest NUE. Our results highlighted physiological reasons for genotype-specific GPC performance and suggested agronomic opportunities to ... Mostrar Tudo |
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Palavras-Chave: |
Grain protein concentration (GPC); Wheat (Triticum aestivum L). |
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Thesagro: |
Trigo; Triticale. |
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Thesaurus Nal: |
Wheat. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02205naa a2200217 a 4500
001 2131344
005 2021-12-10
008 2021 bl uuuu u00u1 u #d
024 7 $a10.1002/csc2.20442$2DOI
100 1 $aLOLLATO, R. P.
245 $aGenotype-specific nitrogen uptake dynamics and fertilizer management explain contrasting wheat protein concentration.$h[electronic resource]
260 $c2021
520 $aIncreasing yield and grain protein concentration (GPC) in wheat (Triticum aestivum L.) without excessive nitrogen (N) rates requires increasing N use efficiency (NUE, yield per available N). We assessed the effects of N rate and timing on yield, GPC, and N nutritional indices of two winter wheat genotypes with similar yield but contrasting GPC. Factorial field experiments evaluated the wheat genotypes ?LCS Chrome? (high GPC) and ?WB?Grainfield? (low GPC), three N rates, and four N timings (?Fall?, 100% of N rate applied at Zadoks GS20; ?Spring?, 100% at GS25; ?Split?, 40% Fall plus 60% Spring; and ?Anthesis?, 40% fall, 50% spring, and 10% at GS61) in six Kansas environments. Yield ranged from 2,853 to 8,023 kg ha-1 and GPC from 88 to 152 g kg-1. Fall and spring N timing had the lowest and greatest yield difference from the zero-N control and showed linear, linear-plateau or no responses to N rate. ?LCS Chrome? had 5 to 19 g kg-1 greater GPC than ?WB?Grainfield?, which was associated with greater post-anthesis N uptake (24 vs 15% of maturity-N uptake), a greater spike N gain between anthesis and maturity (7.4 vs 6.5 g m-2), and greater N recovery efficiency (0.34 vs 0.28 kg kg-1). Greater N rates and Anthesis or Spring N timings increased GPC. The NUE (range: 20?311 kg kg-1) was inversely related to N availability, and Fall N timing had the lowest NUE. Our results highlighted physiological reasons for genotype-specific GPC performance and suggested agronomic opportunities to simultaneously improve wheat yield and GPC.
650 $aWheat
650 $aTrigo
650 $aTriticale
653 $aGrain protein concentration (GPC)
653 $aWheat (Triticum aestivum L)
700 1 $aJAENISCH, B. R.
700 1 $aSILVA, S. R.
773 $tCrop Science, p. 1-19, Dec. 2021.
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