Bulk Density in Jack Bean’s Development Grown in Cerrado Oxisol

Bonfim-Silva, Edna Maria; Paludo, Juliana; Silva, Tonny José Araújo da; Guimarães, Salomão Lima

doi:10.4236/ajps.2015.69134

Cited by 4 publications

(2 citation statements)

References 18 publications

(16 reference statements)

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“…In the present study, we observed that the roots dry mass in all the layers had a linear adjustment decreasing except in the layer 0-0.1 m. These results are in agreement with those found by Bonfim-Silva et al (2015b) that evaluated the development of Canavalia ensiformis with the same bulk density levels and using soil collected in the same area. They observed that, with the increase of the bulk density the smaller pore space between the particles made it difficult to absorb water and nutrients in addition to oxygen reduction, consequently causing inferior root development.…”

Section: Roots Total Dry Masssupporting

confidence: 93%

Correction of soil compaction using wood ash in safflower crop

et al. 2019

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Soil compaction is a big limitation to food production in agriculture. Wood ash is an agro-industrial residue generated by the burning of biomass in boilers for energy production. It can be used as a corrective agent and fertilizer of the soil. In this context, the objective of this study was to evaluate the root system of safflower cultivated under bulk density levels and wood ash doses in dystrophic Oxisol. The experiment was conducted in a greenhouse with a randomized block design under a 5x5 factorial scheme composed of 5 wood ash doses (0, 8, 16, 24, 32 g dm-3) and 5 bulk density levels (1.0, 1.2, 1.4, 1.6, 1.8 Mg m-3) with 4 replicates. The soil was collected from 0-0.20 m depth layer. Later it was incubated with the respective wood ash doses. Each experimental unit consisted of a pot made of three PVC (polyvinyl chloride) rings, in which the layers of 0.1-0.2 m were compacted. At 75 days after emergence, the plants were cut, their roots washed and the volume and dry mass checked. The results were submitted to analysis of variance and subsequent regression test, both at 5% probability. Soil densities negatively influenced the root system development and culture of safflower. Application of wood ash doses of 20 to 24 g dm-3 significantly improved root development of plant.

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Section: Roots Total Dry Masssupporting

confidence: 93%

Correction of soil compaction using wood ash in safflower crop

et al. 2019

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“…Confirming the findings for density, was reported developmental limitations in the morphological and productive characteristics in pig beans (Canavalia ensiformis) with increasing bulk density levels [20].…”

Section: Number Of Headssupporting

confidence: 61%

Reproductive Components of Safflower Genotypes Submitted of Bulk Density Levels in the Brazilian Cerrado

Paludo¹,

Bonfim-Silva²,

Silva³

et al. 2017

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Nutrient absorption in crops can decline and their development can be hindered by increased bulk density. This study aimed at assessing the manner in which bulk density levels affect the reproductive structures of the safflower genotypes in the Brazilian Cerrado. The completely randomized design was adopted with four replications for the experiment, which was conducted in a greenhouse using Oxisol collected from 0.0 to 0.2 m depth from the region supporting Cerrado vegetation. The treatments included ten safflower genotypes (PI 237538, PI 248385, PI 250196, PI 301049, PI 305173, PI 305205, PI 306520, PI 306603, PI 560202 and PI 613366) and five bulk density levels (1.0, 1.2, 1.4, 1.6 and 1.8 Mg•m −3). Evaluations were done at 90 days after emergence, in terms of the number, diameter and dry mass of the heads. The data were submitted to the analysis of variance. The means were grouped using the Scott-Knott test at 5% probability. The diameter and dry mass of the chapters were influenced by the mean bulk density of 1.10 Mg•m −3. A notable interaction was evident between the safflower genotypes and bulk density levels for the diameter and dry mass of the head alone, revealing the high degree of genetic variability that environmental changes induce among the genotypes. The PI 250196, PI 301049, PI 305173 and PI 305205 genotypes exhibited greater stability to the bulk density variations compared with the others. Mean bulk density of 1.2 Mg•m −3 was found to impair the development of the reproductive components of the safflower genotypes.

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