Cassava biology and physiology

El‐Sharkawy, Mabrouk A.

doi:10.1023/b:plan.0000019109.01740.c6

Cited by 227 publications

(342 citation statements)

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“…O máximo valor na parte aérea (56 kg ha -1 dia -1 ) foi estimado aos 125 DAP, revelando que a planta direciona a produção de fotoassimilados, nos períodos iniciais, para a formação da parte aérea, para, em seguida, deslocar os mesmos para os órgãos de reserva (Leihner 1983, Hillocks et al 2002, El-Sharkawy 2004.…”

Section: Resultsunclassified

Acúmulo de matéria seca e micronutrientes em mandioca consorciada com bananeira

Silva

Melo

Pacheco

et al. 2014

Pesqui. Agropecu. Trop.

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INTRODUÇÃOA mandioca é uma espécie perene, de propagação vegetativa e origem sul-americana, pertencente à família Euphorbiaceae, cultivada em todas as regiões do território nacional, sob diversas condições edafoclimáticas. Caracterizada pela produção de raízes e fécula, apresenta importância socioeconômica na região dos trópicos, sendo utilizada como fonte alimentar para humanos e animais, além da produção ABSTRACT RESUMOde energia renovável (Rós et al. 2011, Odubanjo et al. 2011. A determinação do requerimento de nutrientes pelas plantas deve ser feita por meio do conhecimento da curva de crescimento e de absorção de nutrientes pelos órgãos da planta, nas várias fases de desenvolvimento, dentro do ciclo de cultivo. A análise química dos órgãos vegetais é uma ferramenta que permite a avaliação do estado nutricional da planta, identificando a produtividade das culturas, em função Dry matter and micronutrients accumulation in cassava intercropped with banana treeCassava is an important intercropping plant. However, there is little information on its dry matter accumulation and partitioning, as well as micronutrient demand, when it is intercropped with fruit trees. The study was conducted in Januária, Minas Gerais State, Brazil, in 2010-2011, aiming at evaluating the dry matter and micronutrients accumulation in cassava intercropped with irrigated banana tree. A randomized blocks design, with four replications, was used, with treatments consisting of 14 sampling periods, from sowing to harvest. At each sampling period, plants were classified as shoots (stems and leaves) and roots, for determining their dry matter and contents of Cu, Fe, Mn and Zn. The dry matter and micronutrients accumulation fitted a sigmoidal growth pattern. The shoot dry matter accumulation increased up to 200 days after planting (DAP), stabilizing thereafter up to the end of the crop cycle. For roots, the dry matter accumulation was continuous up to the end of the cycle. From 250 DAP, roots became the main dry matter accumulation organ. Micronutrients accumulation in cassava plants occured in the following order: Fe > Zn > Mn > Cu. It was concluded that the cultivation of cassava intercropped with banana tree is viable, provided there is a proper availability of micronutrients required by plants. KEY-WORDS:Manihot esculenta Crantz.; Musa spp.; mineral balance.

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Section: Resultsunclassified

Acúmulo de matéria seca e micronutrientes em mandioca consorciada com bananeira

Silva

Melo

Pacheco

et al. 2014

Pesqui. Agropecu. Trop.

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“…It is one of the twenty mostproduced food and the sixth most consumed in the world, especially in tropical and sub-tropical regions of Africa, Asia and Latin America. This is because cassava is an important source of starch for many people around the world, being considered tolerant to drought and low soil fertility, and develops in different climatic conditions (EL-SHARKAWY, 2004;NJINE, 2010;FAO, 2015). In Brazil, cassava is the third most cultivated plant as a food crop, after sugarcane and soybeans, despite of the low productivity, particularly in northeast (IBGE, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…However, the yield obtained by the small farmers is still far below the potential productivity even using more productive cultivars. Climatic events, such as dry spells and extended drought, degraded soil, pests and diseases usually are involved among the main causes of low yield (El-SHARKAWY, 2004). In most of the situations, these factors contributed to the decrease in the available leaf area for intercepting solar radiation and carbon assimilation (ALVES & SETTER, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…In most of the situations, these factors contributed to the decrease in the available leaf area for intercepting solar radiation and carbon assimilation (ALVES & SETTER, 2004). Although the cassava plants have an inherent tolerance to extended drought stress, due to several physiological mechanisms that enable them to withstand more than three months without rain, their productivity is higher when moisture availability is not limiting (El-SHARKAWY, 2004). The objective of this study was identify the cassava cultivars from Brazilian Germplasm Bank with the greatest potential for drought tolerance and; therefore, more adapted to the environmental conditions of the Coastal Tableland of Northeast Brazil.…”

Section: Introductionmentioning

confidence: 99%

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Productivity and drought tolerance of cassava cultivars in the Coastal Tablelands of Northeastern Brazil

Carvalho

Oliveira

et al. 2016

Cienc. Rural

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Ten cassava cultivars were grown in the field and evaluated to identify the most adapted to the Coastal Tablelands of northeast Brazil. The cultivars showed differences in proline and chlorophyll contents, plant height, number of leaves and branches, canopy area and root production, however they did not differ on photosynthetic rates. whereas 'BRS Tapioqueira' and 'Irará' had the highest root yield. Few leaves coupled with the highest water use efficiency for CO 2 assimilation was found in 'BRS Kiriris' in contrast to

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“…Thus, sulfentrazone emerges as an option for weed control in cassava crops because of the high efficiency and the fact that the mechanism of action (Protox) is different from the herbicides registered (El-Sharkawy, 2004;Silva et al, 2009;Scariot et al, 2013). However, sulfentrazone has shown low selectivity to cassava plants when grown in sandy soil (Oliveira Jr. et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

et al. 2015

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Recebido para publicação em 16.7.2015 ABSTRACT -Weeds have the potential to dramatically interfere in cassava cultivation, reducing its productive potential; however, there are few studies on the selective herbicides in this crop. Therefore, the objective was to evaluate in this work the selectivity and efficiency of sulfentrazone in cassava crops grown in sandy and clayey soils. Two experiments were carried out: The first one was carried out in sandy soil conditions in the conventional system; and the second one was carried out in clayey soil conditions in the no-tillage system. The experimental design was a randomized block with four replications. The treatments consisted in doses of 250, 500, 750 and 1,000 g ha -1 of sulfentrazone, and weeded and non-weeded controls. Sulfentrazone application in cassava crops has linearly reduced the production of roots in a proportion of 0.0153 and 0.0107 t ha -1 at each increment in grams of the active ingredient, respectively. It was concluded that sulfentrazone was not selective for cassava crops grown both in sandy and in clayey soil; however, it was highly effective in weed control in both soils.

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Cassava biology and physiology

Cited by 227 publications

References 0 publications

Acúmulo de matéria seca e micronutrientes em mandioca consorciada com bananeira

Acúmulo de matéria seca e micronutrientes em mandioca consorciada com bananeira

Productivity and drought tolerance of cassava cultivars in the Coastal Tablelands of Northeastern Brazil

Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

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