Influência da adubação com nitrogênio e cálcio nas características morfológicas e produtivas das raízes de capim-tanzânia cultivado em solução nutritiva

Silveira, Cristiane Prezotto; Monteiro, Francisco Antônio

doi:10.1590/s1516-35982011000100007

Cited by 9 publications

(7 citation statements)

References 8 publications

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“…Increase in the N rates (Figure 7a) may increase the need of Ca to grow and to reinforce cell walls, to activate enzymes and to balance the cations for the plant development (Epstein & Bloom, 2005). However, Silveira & Monteiro (2011) observed that the increase in N rates in Tanzânia guineagrass did not increase Ca absorption.…”

Section: Resultsmentioning

confidence: 89%

Root system characteristics of Marandu palisadegrass supplied with nitrogen and magnesium rates

et al. 2011

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-The development of root system of forage grasses is influenced by the supply of mineral nutrients. The experiment was carried out in a greenhouse in Piracicaba, São Paulo State, with the objective of evaluating the effect of nitrogen and magnesium rates on dry mass yield, total length and surface, specific length and surface, and concentrations of nitrogen, magnesium, calcium and potassium in the root system of Brachiaria brizantha Stapf. cv. Marandu. It was studied five rates of nitrogen (2, 9, 16, 23 and 30 mmol L -1 ) and five rates of magnesium (0. was a randomized block with four replications. Plants had two growth periods, and after the second harvest the roots were separated from the plant tops. Combination of the high rates of nitrogen and magnesium resulted in expressive increases in rooty dry matter yield, in the length and in the root surface of marandu palisadegrass. High rates of nitrogen and magnesium resulted in short root specific length and surface. Combinations of high rates of nitrogen and magnesium increased nitrogen concentration or decreased potassium concentration in the roots. Calcium concentration in the roots was increased by nitrogen rates and decreased by magnesium rates. Magnesium rates resulted in increase in magnesium concentration in the roots of marandu palisadegrass.

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Section: Resultsmentioning

confidence: 89%

Root system characteristics of Marandu palisadegrass supplied with nitrogen and magnesium rates

et al. 2011

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“…From the analysis of the laboratory results of erosions (Table 4), the level of calcium in the superficial layers of the horizons is high, except for Gullie da Vendinha, which has an adequate level of this nutrient. This is explained by the fact that calcium is essential for plant growth, however, in acid soils such as those studied, although the calcium level is high, it is not available to plants due to the chemical competition for the hydrogen ion (Silveira & Monteiro, 2011). The lower pH values indicated the presence of free acids and the larger ones indicated the presence of saline or limestone soils.…”

Section: Chemical Composition Analysismentioning

confidence: 81%

Characterization and Analysis of Gullies in the Sub-basin of Ribeirão Serra in Morrinhos, Goias, Brazil

Silva¹,

Giongo²,

Barbosa³

et al. 2019

JAS

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Due to the reduction of the vegetation cover, the exposed soil increases the erosive vulnerability, and reduces the organic matter content, factors that can aggravate with less production of vegetal mass and microbiological activity of the arable layers, rich in calcium carbonate and that increases the degradation of the soil structure leading to the formation of gullies. This study aimed to characterize and survey the physical, chemical and structural characteristics of soils of four gullies located in the sub-basin of Ribeirao Serra by means of physical-chemical parameters and subjected to multivariate analysis. Slope maps, hypsometry, drainage network and soil types were elaborated. Morphological description of the soil, georeferencing of the boundaries of each gullie, and collection of deformed soils samples for physical-chemical and structural analysis were performed. Soil samples were collected on the slopes of the gullies at three points of each erosion, with three replicates, one in each horizon (A, B and C) at depths ranging from 0 to 310 cm. Qualitative tests were also carried out to verify the presence of some substances in the soil, such as carbonates and manganese. The data were submitted to the multivariate analysis, by means of Discriminant Analysis of Partial Least Squares analysis to evaluate the grouping of gullies in relation to the analyzed elements (physical-chemical), identifying if the set of elements interact with each other and/or present similarities. There is a high degree of anthropization with the use of pasture cultivated around the four gullies studied. According to the multivariate analysis the gullies Barreiro, Vendinha and Capim, are different, while it resembles the gull of the Retreat with the gullies Vendinha and Capim. The chemical elements present greater weight than the physical ones, in the separation of the gullies through the multivariate model.

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“…The doses were high because of the low solubility of eggshells (between 10 and 15%) and were based on the study of Silveira & Monteiro (2011). The experimental design used in the study was randomized blocks with four replicates.…”

Section: Experiments Imentioning

confidence: 99%

“…It should be pointed out that, in Brazil, extensive areas of pasture are cultivated in soils with low natural fertility, which have low contents of calcium, magnesium, sulfur (Oliveira et al, 2009) and micronutrients. In this context, it is important to evaluate nutritional, bromatological and productive aspects of forages when there is the supply of other nutrients such as calcium, in order to optimize the recommendation of fertilization for pastures (Silveira & Monteiro, 2011).…”

Section: Introductionmentioning

confidence: 99%

Eggshell as a source of calcium in the production, nutrition and bromatological composition of 'Piatã' and 'Marandu' grasses

Silveira

Rabêlo

Rezende

et al. 2016

Rev. bras. eng. agríc. ambient.

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The demand for environmentally sustainable agricultural production systems encouraged this study, which evaluated the productive aspects and nutritional status of 'Piatã' palisadegrass and productive aspects and bromatological composition of 'Marandu' palisadegrass fertilized with eggshell, replacing other sources of calcium. 'Piatã' palisadegrass was grown in the field, in a randomized block design, and 'Marandu' palisadegrass in pots, in a completely randomized design, both with eggshell doses equivalent to 0, 78, 156, 234, 312 and 390 kg ha-1 of total calcium, using four replicates. The productive aspects of 'Piatã' and 'Marandu' grasses were not significantly altered by the eggshell doses, as well as the contents and accumulations of N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn in the 'Piatã' palisadegrass and dry mass, neutral detergent fiber, acid detergent fiber, hemicellulose, crude protein, digestible energy, metabolizable energy and the apparent digestibility of dry mass in the 'Marandu' palisadegrass. As a source of calcium, eggshell did not increase the mass production of the forages and did not promote improvements in the nutritional status of 'Piatã' palisadegrass and bromatological composition of 'Marandu' palisadegrass.

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Influência da adubação com nitrogênio e cálcio nas características morfológicas e produtivas das raízes de capim-tanzânia cultivado em solução nutritiva

Cited by 9 publications

References 8 publications

Root system characteristics of Marandu palisadegrass supplied with nitrogen and magnesium rates

Root system characteristics of Marandu palisadegrass supplied with nitrogen and magnesium rates

Characterization and Analysis of Gullies in the Sub-basin of Ribeirão Serra in Morrinhos, Goias, Brazil

Eggshell as a source of calcium in the production, nutrition and bromatological composition of 'Piatã' and 'Marandu' grasses

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