TITLE:
Reproductive Components of Safflower Genotypes Submitted of Bulk Density Levels in the Brazilian Cerrado
AUTHORS:
Juliana Terezinha Sasso Paludo, Edna Maria Bonfim-Silva, Tonny José Araújo da Silva, Maurício Dutra Zanotto, William Fenner, Marcio Koetz
KEYWORDS:
Carthamus tinctorius L., Bulk Density, Oleaginous Crop, Safflower Genotypes, Physical Attributes of Soil
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.9,
August
4,
2017
ABSTRACT: 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.