Comportamento do sorgo granífero em função de diferentes frações da água disponível no solo

Peiter, Márcia Xavier; Carlesso, Reimar

doi:10.1590/s0103-84781996000100010

Cited by 7 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Peiter and Carlesso (1996), the results of reducing the LAI, caused by water stress, is an irreversible fact for the plant. The authors point out that this behavior is the morpho-physiological adaptation of the plant, especially when it occurs during the growth and development of the sorghum crop, causing decreased absorption in interception and photosynthetically active solar radiation.…”

Section: Resultsmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

show abstract

“…O comportamento da altura das plantas respondendo positivamente ao incremento da irrigação verificado neste trabalho (Figura 1) é corroborado por Peiter;Carlesso (1996), que constataram aumento no comprimento de entrenós com a maior fração da água disponível. De igual maneira, Chielle et al (1984) verificaram que a redução na altura de sorgo sacarino ocorre em função da quantidade da água disponível no solo.…”

Section: Tabela 2 -Resumo Daunclassified

Características morfológicas de sorgo sacarino BRS 501 em deficit hídrico

et al. 2016

View full text Add to dashboard Cite

A cultura do sorgo [Sorghum bicolor (L.) Moench] destaca-se das demais por tolerar tanto o deficit hídrico como o excesso de umidade no solo, em situações ambientais muito secas e/ou muito quentes, nas quais a produtividade de outros cereais tornase antieconômica. Este trabalho objetivou avaliar os efeitos da irrigação na conformação radicular na fase inicial de desenvolvimento do sorgo sacarino. Nesse propósito, foi utilizada a cultivar BRS 501 submetida a quatro níveis de irrigação que se basearam em 80%, 60%, 40% e 20% da capacidade de campo (CC). A diminuição na disponibilidade de água no solo influenciou negativamente a maioria das características avaliadas com exceção da relação entre o sistema radicular e a parte aérea (SR/PA), diâmetro médio de raiz (DMR) e área radicular específica (ARE). Concluise que o crescimento das plantas de sorgo sacarino é sensível à diminuição de água no solo, sendo afetado pela baixa disponibilidade hídrica. A metodologia utilizada, comum a outras culturas, adequa-se ao sorgo sacarino para estabelecer disponibilidades hídricas em estudos com a finalidade de discriminar cultivares tolerantes à seca.

show abstract

“…FAO (2000) reported many cases where DI was a beneficial impact on water savings. In SA, deficit irrigation techniques has been investigated for olives (Sellés et al, 2006), grapevine (Ferreyra et al, 2003), Chilean tomato (Maldonado et al, 2003) in Chile; maize (Bergamaschi et al, 2006), sugarcane , irrigated coffee (Fernandes et al, 2000), sorghum (Peiter and Carlesso, 1996), beans (Phaseolus vulgaris) (Calvache et al, 1997;Guimarães et al, 2006), garlic (Macêdo et al, 2006), watermelon (Citrullus lanatus) (Andrade Júnior et al, 2001) in Brazil; quinoa in Bolivia (Geerts et al, 2006); sugar cane in Argentina (Romero et al, 2006).…”

Section: Deficit Irrigation As a Water Saving Practicementioning

confidence: 99%

Irrigation Water Management in Latin America

Oliveira

Trezza

Holzapfel³

et al. 2009

Chilean J. Agric. Res.

View full text Add to dashboard Cite

Latin American countries show a great potential for expanding their irrigated areas. Irrigation is important for strengthening local and regional economy and for enhancing food security. The present paper aimed at providing a brief review on key aspects of irrigation management in Latin America. Poor irrigation management can have great impact on crop production and on environment while good management reduces the waste of soil and water and help farmers maximizing their profits. It was found that additional research is needed to allow a better understanding of crop water requirements under Latin American conditions as well as to provide farmers with local derived information for irrigation scheduling. The advantages of deficit irrigation practices and the present and future opportunities with the application of remote sensing tools for water management were also considered. It is clear that due to the importance of irrigated agriculture, collaborative work among Latin American researchers and institutions is of paramount importance to face the challenges imposed by a growing population, environment degradation, and competition in the global market.

show abstract

Comportamento do sorgo granífero em função de diferentes frações da água disponível no solo

Cited by 7 publications

References 7 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

Características morfológicas de sorgo sacarino BRS 501 em deficit hídrico

Irrigation Water Management in Latin America

Contact Info

Product

Resources

About