Desempenho agronômico de genótipos de cártamo submetidos a compactação em latossolo de cerrado
Carregando...
Data
2015-11-12
Autores
Paludo, Juliana Terezinha Sasso
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Mato Grosso
Resumo
The global demand for new energy sources has boosted the
cultivation of new oleaginous plants for the production of biodiesel. The crop
development may be limited by soil compaction is one of the factors that
influence the penetration capacity and root growth in the soil. The objective was
to evaluate the agronomic performance of safflower genotype (Catthamus
tintorius L.) subjected to soil density levels. The experiment was conducted in a
greenhouse during the period from April to August 2015. The soil was the
Oxisol collected in area under Cerrado vegetation in the layer of 0-0.20 m. The
experimental design was completely randomized in four replications, with five
levels of soil density (1.0, 1.2, 1.4, 1.6 and 1.8 Mg m-3
) and ten safflower
genotypes (PI 237538, PI 248385, PI 250196, PI 301049, PI 305173, PI
305205, PI 306596, PI 306603, PI 560202 and PI 613366) selected from
genetic material with promising agronomic characteristics for the production of
biodiesel by the Mato-grossense Institute cotton (IMAmt) in four replications.
The experimental unit was represented by a pot of 9.423 dm3
, made from rigid
PVC pipe of 200 mm internal diameter, 300 mm height, and it comprises three
rings 100 mm, joined with tape "duct tape" the upper and lower rings pots were
filled with soil density 1.0 Mg m-3 and the intermediate treatment as soil density.
The experimental data were subjected to analysis of variance and the means
were grouped by the Scott-Knott test at 5% probability. The statistical program
used was SISVAR. Were evaluated during the experiment number of leaves,
plant height, stem diameter, chlorophyll content (SPAD index) number of
primary, secondary and tertiary branches, chapter number, shoot dry mass,
chapters, the Total shoot, dry matter root of the upper ring, intermediate and
lower dry matter total root, total dry weight, root volume of the top ring,
intermediate and lower overall root volume and mass relation shoot dry / dry
weight root. The increase in soil density levels showed significant changes in
variables of safflower genotypes. Genotypes PI 250196, PI 301049, PI 305173
and PI 305205 showed the best agronomic performance. The PI 250196
genotype showed better root development. The dry matter production of shoots
began to be influenced from the soil density 1.10 Mg m-3
, for dry root mass
reduction was observed from the soil density 1.04 Mg m-3
level critical to the
development of safflower genotypes was observed for values close to the
ground density of 1.10 Mg m-3
.
Descrição
Palavras-chave
Citação
PALUDO, Juliana Terezinha Sasso. Desempenho agronômico de genótipos de cártamo submetidos a compactação em latossolo de cerrado. 2015. 91 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2015.