Características morfológicas e produtivas da maniçoba cultivada sob lâminas hídricas e doses de nitrogênio

Filho, José Teodórico de Araújo; Paes, Reinaldo de Alencar; Amorim, Philipe Lima de; Comassetto, Fernanda; Silva, Silvia Comassetto da

doi:10.1590/s1519-99402013000400001

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…For the variables carrying capacity (CCAP), WAC and WUE, it was observed that the increase of the nitrogen levels (0, 100, 200 and 400 kg N ha -1 ) provided increasing linear increments, being observed that the higher the level of nitrogen the higher the cactus pear production (Table 2). However, the same pattern was not observed on NUE, which presented decreasing linear effect, and this behavior was similar to those found by Araújo Filho et al (2013), who obtained maximum N efficiency at the lowest nitrogen level (50 kg ha -1 ), associating this effect to the higher assimilation and lower nutrient loss by leaching or volatilization to the environment. In the present study, the lowest level tested (100 kg N ha -1 ) presented the best efficiency, which means it took a lower amount of N applied to produce one kg of accumulated DFMY, and this efficiency reduced as the N level applied increased.…”

Section: Resultssupporting

confidence: 88%

Evaluation of Application Frequency and Levels of Nitrogen on Cactus Pear

Nascimento

Edvan

Gomes³

et al. 2020

JAS

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The objective of this study was to evaluate the agronomic characteristics of Nopalea cochenillifera (L.) Salm-Dick under different frequencies and levels of nitrogen application (N). Three nitrogen fertilizer application frequencies (1 time year-1, 6 times year-1 and 12 times year-1) and four nitrogen levels (0, 100, 200 and 400 kg of N ha-1 year-1) were evaluated one year after the planting, in a randomized blocks design with 12 replications. There was no interaction (P>0.05) between application frequencies and nitrogen levels. The number of cladodes, and the green and dry forage mass yields of the cactus pear were higher with the application frequency of 6 times year-1, presenting 18.4 ± 2.0 cladodes per plant, 151.0 ± 17.8 and 9.8 ± 1.0 t ha-1, respectively. The yield doubled with the application of 400 kg N ha-1, when compared to the treatment with no nitrogen application. With the nitrogen application frequency of 1 time year-1 the crude protein and neutral detergent fiber contents were higher, presenting 4.0 ± 0.1% and 33.8 ± 0.5%, respectively. When nitrogen is applied 6 times year-1 it provides higher growth and yield, but lower protein and fiber contents. The level 400 kg N ha-1 provides higher yield and lower nitrogen use efficiency.

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Section: Resultssupporting

confidence: 88%

Evaluation of Application Frequency and Levels of Nitrogen on Cactus Pear

Nascimento

Edvan

Gomes³

et al. 2020

JAS

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“…Apesar do déficit hídrico ser mais drástico em estádios reprodutivos, o acúmulo de massa de matéria seca da parte aérea não parece ter sido drasticamente afetado nesse período, pois a planta está direcionando o seu metabolismo para o desenvolvimento das sementes que estão sendo formadas; nessa etapa há pouco crescimento e expansão foliar, além disso, caso a planta não tenha capacidade de fornecer o suprimento adequado para a expansão foliar, ela irá utilizar de suas reservas, retranslocado-as das folhas mais velhas para os pontos de crescimento (ARAÚJO-FILHO et al, 2013).…”

Section: Desenvolvimento Das Plantasunclassified

Fenotipagem de alto rendimento durante o desenvolvimento de plantas e produção de sementes de soja sob deficiência hídrica

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Water regimes on the development of accessions of the Manihot genus

Sobreira,

Simões,

Nunes

et al. 2023

Rev. Caatinga

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The objective of this work was to select water deficittolerant accessions of the genus Manihot, through morphological characters under different water regimes. The experiment was conducted in a randomized block design, using a split-plot arrangement with plots consisting of tree water regimes (simulated rainfall and water depth of 100 and 20% crop evapotranspiration (ETc)), and subplots consisting of eight accessions of the genus Manihot (Gema-de-Ovo and Engana-Ladrão from the species M. esculenta Crantz, and BGMS-115, BGMS-110, BGMS-102, BGMS- 79, BGMS-24, and BGMS-48 from Manihot sp.). The accessions were evaluated considering two crop cycles: the first had 120 and 60 days from the application of the treatments. Plant height, stem diameter, number of leaves, leaf lobe length and shoot dry mass production were evaluated. For each cropping cycle, a split-plot analysis of variance was performed. The highest genotypic means were expressed by the accessions BGMS-115, BGMS-102, BGMS- 79 and BGMS-24 for most of the analyzed variables, regardless of the cultivation cycle. For the characteristic shoot dry mass production, accessions BGMS-102 and BGMS-79 showed the best performances under conditions of limited water regime (20% ETc), regardless of the cropping cycle. Accession BGMS-102 was also grouped in the group with the highest genotypic means, for this trait, in treatments with rain simulation and 100% ETc, in the first cycle, demonstrating that, under stress conditions, this accession is an option to tolerate low water precipitation and responds well when higher precipitation occurs.

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Características morfológicas e produtivas da maniçoba cultivada sob lâminas hídricas e doses de nitrogênio

Cited by 6 publications

References 8 publications

Evaluation of Application Frequency and Levels of Nitrogen on Cactus Pear

Evaluation of Application Frequency and Levels of Nitrogen on Cactus Pear

Fenotipagem de alto rendimento durante o desenvolvimento de plantas e produção de sementes de soja sob deficiência hídrica

Water regimes on the development of accessions of the Manihot genus

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