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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
25/06/1996 |
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Data da última atualização: |
05/01/2012 |
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Autoria: |
SILVA, E. M. da. |
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Título: |
Analysis of furrow irrigation uniformity as affected by furruw spacing. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Arizona: The University of Arizona, 1990. |
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Volume: |
2 v. |
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Páginas: |
449p. |
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Idioma: |
Inglês |
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Notas: |
Tese Doutorado. |
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Conteúdo: |
This research examines the effects of furrow spacing on irrigation uniformity and efficiency. Laboratory and field experiments were conducted to obtain information on soil physical characteristics, furrow infiltration and water advance data in order to validate the theoretical results. A furrow infiltration model based on Richards' equation and a finite element technique is developed and used to predict infiltrated depths in the transverse and longitudinal directions relative to the furrow centerline and furrow inlet, respectively. The model predicted measured furrow infiltration in the field from the third irrigation but failed to do so for the first and second irrigations. Simulations of furrow irrigation in a hypothetical soil with various furrow spacingsshowed that cumulative infiltration is not affected by furrow spacing until the lateral wetting front reaches the imaginary vertical boundary located midway between two furrows. An analysis of uniformity and efficiency from predicted water distribution profiles from field irrigated furrows are conclusive in that the use of longitudinal water distribution profile alone is not enough to assess the performance of furrow irrigation. The transverse distribution of infiltrated depths which is a function of furrow spacing must be included in the analysis. |
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Palavras-Chave: |
Uniformidade. |
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Thesagro: |
Irrigação por Sulco. |
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Thesaurus Nal: |
furrow irrigation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01819nam a2200181 a 4500
001 1077587
005 2012-01-05
008 1990 bl uuuu m 00u1 u #d
100 1 $aSILVA, E. M. da
245 $aAnalysis of furrow irrigation uniformity as affected by furruw spacing.
260 $aArizona: The University of Arizona$c1990
300 $a449p. 2 v.
490 $v2 v.
500 $aTese Doutorado.
520 $aThis research examines the effects of furrow spacing on irrigation uniformity and efficiency. Laboratory and field experiments were conducted to obtain information on soil physical characteristics, furrow infiltration and water advance data in order to validate the theoretical results. A furrow infiltration model based on Richards' equation and a finite element technique is developed and used to predict infiltrated depths in the transverse and longitudinal directions relative to the furrow centerline and furrow inlet, respectively. The model predicted measured furrow infiltration in the field from the third irrigation but failed to do so for the first and second irrigations. Simulations of furrow irrigation in a hypothetical soil with various furrow spacingsshowed that cumulative infiltration is not affected by furrow spacing until the lateral wetting front reaches the imaginary vertical boundary located midway between two furrows. An analysis of uniformity and efficiency from predicted water distribution profiles from field irrigated furrows are conclusive in that the use of longitudinal water distribution profile alone is not enough to assess the performance of furrow irrigation. The transverse distribution of infiltrated depths which is a function of furrow spacing must be included in the analysis.
650 $afurrow irrigation
650 $aIrrigação por Sulco
653 $aUniformidade
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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Biblioteca |
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Origem |
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Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
13/12/2018 |
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Data da última atualização: |
13/12/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
REINEHR, M.; LAMEGO, F. P.; CARATTI, F. C.; PERUZZO, S. T.; FABIANI, M. F.; MAZZON, M. |
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Afiliação: |
Marcela Reinehr, UFSM; FABIANE PINTO LAMEGO, CPPSUL; Fernanda Cassiane Caratti, UFSM; Sabrina Tolloti Peruzzo, UFSM; Mirian Fracasso Fabiani, UFSM; Marinês Mazzon, UFSM. |
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Título: |
Relative yield of wheat in coexistence with concurrent plants as indicator of competitiveness. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Comunicata Scientiae, v. 9, n. 3, p. 332-339, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
One of the factors that limit the yield of wheat is the weed competition, being the competitive potential of plants affected by their morphophysiological characteristics. The objective of this study was to determine the competitiveness of wheat when in coexistence with Italian ryegrass (Lolium multiflorum) and radish (Raphanus sativus) competitive plants or with wheat as simulator competition plant. There were realized four experiments in the greenhouse of the Agricultural Department of Environmental Sciences of the UFSM, Campus of Frederico Westphalen ? RS, during July to September, 2012. The treatments were arranged in a replacement series, in the proportions of 100:00 (wheat monoculture), 75:25, 50:50, 25:75 and 100:00 (competitor plant monoculture) for wheat plants (cv. Fundacep Cristalino) and for Italian ryegrass, radish and wheat (cv. BRS Guamirim) as competitor plants. The wheat is more competitive than Italian ryegrass in initial coexistence, even in the smallest proportion of plants. The radish when intercropped with wheat demonstrates similar competitive potential for environmental resources to the crop. There is mutual beneficial effect when wheat cultivars Fundacep Cristalino and BRS Guamirim coexisted, and each cultivar seems to have mechanism to avoid competition. |
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Thesagro: |
Competição de Variedade; Erva Daninha; Trigo; Triticum Aestivum. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/188328/1/1347-10272-1-PB.pdf
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Marc: |
LEADER 01966naa a2200229 a 4500
001 2101403
005 2018-12-13
008 2018 bl uuuu u00u1 u #d
100 1 $aREINEHR, M.
245 $aRelative yield of wheat in coexistence with concurrent plants as indicator of competitiveness.$h[electronic resource]
260 $c2018
520 $aOne of the factors that limit the yield of wheat is the weed competition, being the competitive potential of plants affected by their morphophysiological characteristics. The objective of this study was to determine the competitiveness of wheat when in coexistence with Italian ryegrass (Lolium multiflorum) and radish (Raphanus sativus) competitive plants or with wheat as simulator competition plant. There were realized four experiments in the greenhouse of the Agricultural Department of Environmental Sciences of the UFSM, Campus of Frederico Westphalen ? RS, during July to September, 2012. The treatments were arranged in a replacement series, in the proportions of 100:00 (wheat monoculture), 75:25, 50:50, 25:75 and 100:00 (competitor plant monoculture) for wheat plants (cv. Fundacep Cristalino) and for Italian ryegrass, radish and wheat (cv. BRS Guamirim) as competitor plants. The wheat is more competitive than Italian ryegrass in initial coexistence, even in the smallest proportion of plants. The radish when intercropped with wheat demonstrates similar competitive potential for environmental resources to the crop. There is mutual beneficial effect when wheat cultivars Fundacep Cristalino and BRS Guamirim coexisted, and each cultivar seems to have mechanism to avoid competition.
650 $aCompetição de Variedade
650 $aErva Daninha
650 $aTrigo
650 $aTriticum Aestivum
700 1 $aLAMEGO, F. P.
700 1 $aCARATTI, F. C.
700 1 $aPERUZZO, S. T.
700 1 $aFABIANI, M. F.
700 1 $aMAZZON, M.
773 $tComunicata Scientiae$gv. 9, n. 3, p. 332-339, 2018.
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Embrapa Pecuária Sul (CPPSUL) |
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