Desempenho produtivo e retorno econômico da cultura do sorgo submetida à irrigação deficitária

Zwirtes, Anderson Luiz; Carlesso, Reimar; Petry, Mirta Teresinha; Kunz, Junior; Reimann, G.K.

doi:10.1590/1809-4430-eng.agric.v35n4p676-688/2015

Cited by 10 publications

(12 citation statements)

References 27 publications

(24 reference statements)

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“…Corroborate with the results found in the work Zwirtes et al (2015), that evaluating the morphological characteristics and productivity of sorghum plants submitted to deficit irrigation, achieved increment of 15% in the LAI in treatment 100% of ETc with LAI of 7.96 cm from the treatment of 25% ETc with 6.04 cm, at 60 days after emergence. With these results, it is clear that the change in water depth, variation provided the LAI with increased rate as the increase in irrigation depth.…”

Section: Resultssupporting

confidence: 86%

“…Another work which corroborates the results obtained is the one by Zwirtes et al (2015), who, in evaluating morphological and physiological characteristics and productivity of sorghum plants submitted to deficit irrigation, have found higher dry matter yield in the level of 100% of the ETo with 13,785 kg.ha , being close to the 13,680 kg.ha -1 found in the level of 140% of the ETo. Skonieski et al (2010) also contribute, when working with double purpose sorghum, in finding dry matter production of 13,006 kg.ha -1 , while for sorghum they obtained a productivity of 17,527 kg.ha -1…”

Section: Resultssupporting

confidence: 77%

“…With these results, it is clear that the change in water depth, variation provided the LAI with increased rate as the increase in irrigation depth. As the results found by Zwirtes et al (2015), the obtained in this study had an increase in the LAI with the increased level of irrigation, however, due to the standardization of cuts made, the IAF's maximum obtained were below those found by the author cited, where the highest levels were found at 80 DAS, with 4.80, at depth 120% of ETo.…”

Section: Resultssupporting

confidence: 46%

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Variation of leaf area index of the forage sorghum under different irrigation depths in dynamic of cuts

Kirchner¹,

Robaina²,

Peiter³

et al. 2017

Afr. J. Agric. Res.

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The determination of leaf area index is a variable of great importance for predicting productivity, especially when it comes to forage species where the desired product is the leaves. This study aimed to determine the variation of the leaf area index of forage sorghum when subjected to different irrigation depths in four culture cuts. Treatments consisted of six irrigation depths, these being 0, 60, 80, 100, 120 and 140% of the reference evapotranspiration. Seven evaluations of leaf area index (LAI) were performed, which were in the four cuts, specifically at 50, 80, 110 and 140 days after sowing (DAS), and also 15 days after each cut to evaluate the culture's resprouting, that is, at 65, 95 and 125 DAS. The delineation was randomized blocks, with six treatments and four blocks, totaling 24 experimental units. The experiment was conducted in Santiago-RS. Sowing was done on November 18, 2014. Using an irrigation system sprinkler, with one main row and six lateral rows, of PVC, being the irrigation levels differentiated by the nozzle diameter difference of sprinkler each lateral row. Samples of 0.5 linear meters per plot were collected in each of the seven evaluations, totaling 24 samples for evaluation. The analysis of leaf area index was performed using the computer program ImageJ. Significant results were found for the influence of the different irrigation levels on the leaf area index in the four cuts (recommended periods for grazing) evaluated, as well as for resprouting evaluations in the intermediate periods between cuts. Quadratic equations were adjusted for all the evaluation dates, where the 100 and 120% reference evapotranspiration levels alternated the largest LAI for all evaluations. The results also characterize that the second cut, or second grazing period of the irrigated forage sorghum, was the most productive, being it possible to recommend an increase in the animal load, or increase in grazing period in the area in this period. In this way, irrigation by sprinkling in the sorghum culture was characterized as an alternative for producers to increase leaf area index, and, consequently, crop productivity.

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Section: Resultssupporting

confidence: 86%

Section: Resultssupporting

confidence: 77%

Section: Resultssupporting

confidence: 46%

See 1 more Smart Citation

Variation of leaf area index of the forage sorghum under different irrigation depths in dynamic of cuts

Kirchner¹,

Robaina²,

Peiter³

et al. 2017

Afr. J. Agric. Res.

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“…However, the tolerance of sorghum to water deficit is over short periods of time; its growth and productivity may be affected negatively when it is subjected to prolonged water deficit periods (ASSEFA et al, 2010). Thus, the correct use of irrigation can enhance the production of forage sorghum, as shown by Zwirtes et al (2015) and Kirchner et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Response of Forage Sorghum to Water Availability in a Typic Quartzipsamment

et al. 2019

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The objective of this work was to determine the factors of soil water availability (FSWA) that result in the highest agronomic performance of irrigated forage sorghum, with no changes in the plants' chemical-bromatological composition. The experiment was conducted at the Montes Claros State University, Janaúba campus, MG, Brazil, in a Typic Quartzipsamment (Neossolo Flúvico Psamítico - Embrapa) with 59 mm of soil water storage capacity in the 0.0-0.3 m layer, under drip irrigation. A randomized block design with four replications and a split-plot arrangement was used, consisting of five FSWA (f0.2 = 0.20; f0.35 = 0.35; f0.5 = 0.50; f0.65 = 0.65, and f0.8 = 0.80) in the plots and two simple forage sorghum hybrids (Volumax® and BRS-655) in the split-plots. The evaluations were based on fortnightly measurements of plant height, plant transversal diameter, number of leaves per plant, leaf area index, relative chlorophyll content, stem diameter, panicle length, dry matter yield, water use efficiency, crude protein, mineral matter, acid detergent fiber, neutral detergent fiber, and lignin. The FSWA of 0.20 and 0.35 increased dry matter yield and plant height of the two evaluated sorghum hybrids. The Volumax hybrid presented more crude protein content and acid detergent fiber. The evaluated FSWA did not change the chemical-bromatological composition of the sorghum hybrids.

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“…Um déficit hídrico na produção do sorgo sacarino causa uma redução na produtividade de grãos, redução na área foliar e rendimento de caldo (ZWIRTES et al, 2015). Isso evidencia que a uniformidade de aplicação tem impacto na eficiência da irrigação, a qual se caracteriza por fornecer quantidade de água necessária ao desenvolvimento e ao rendimento de determinada cultura de modo que nenhuma planta receba mais água que a outra.…”

Section: Introductionunclassified

Uniformidade De Um Sistema De Irrigação Por Gotejamento Na Cultura Do Sorgo Sacarino

Silva¹,

Gomes²,

Santos³

et al. 2017

Anais Do IV Inovagri International Meeting - 2017

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RESUMO:A uniformidade dos sistemas de irrigação influencia diretamente o manejo, a qualidade, a eficiência, o custo, assim como o desempenho da cultura no campo. Uma baixa uniformidade de distribuição de água faz com que determinadas plantas irrigadas recebam mais água do que outras, resultando em um desenvolvimento desuniforme dentro da cultura.Objetivou-se avaliar a uniformidade através de dois coeficientes e a eficiência de aplicação de água em sistema de irrigação por gotejamento na cultura do sorgo sacarino. O ensaio foi realizado em condições de campo sob cultivo de sorgo sacarino e para as determinações empregou-se metodologia com 16 pontos e a variação da pressão foi determinada por manômetros digitais, instalados no início e no final do sistema. Foram realizadas avaliações em 5 áreas, com 4 repetições cada, e com a vazão média das repetições dos pontos de coleta, calculou-se o coeficiente de uniformidade de distribuição (CUD), coeficiente de Christiansen (CUC) e a eficiência de aplicação (EA). Os valores encontrados de CUC, CUD e EA mostraram que o sistema encontra-se em excelente estado de aplicação de água. PALAVRAS-CHAVE:irrigação localizada, coeficientes, eficiência de aplicação de água. UNIFORMITY OF A DRIP IRRIGATION SYSTEM IN THE SORGHUM SACCHARINE CROPABSTRACT: The uniformity of irrigation system influences management, quality, efficiency, cost, as well as crop performance directly in the field. A low uniformity of water distribution causes certain irrigated plants to receive more water than others, resulting in uneven development within the crop. The objective of this study was to evaluate the uniformity by two

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Desempenho produtivo e retorno econômico da cultura do sorgo submetida à irrigação deficitária

Cited by 10 publications

References 27 publications

Variation of leaf area index of the forage sorghum under different irrigation depths in dynamic of cuts

Variation of leaf area index of the forage sorghum under different irrigation depths in dynamic of cuts

Response of Forage Sorghum to Water Availability in a Typic Quartzipsamment

Uniformidade De Um Sistema De Irrigação Por Gotejamento Na Cultura Do Sorgo Sacarino

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