Características produtivas e fitométricas de capim marandu em recuperação com doses de cinza vegetal e formas de aplicação
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Data
2017-02-08
Autores
Espirito Santo, Éllen Souza do
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Universidade Federal de Mato Grosso
Resumo
The recovery pasture degradation is needed to prevent opening up new
areas and increase productivity. The use of wood ash as an alternative fertilizer is a
way to reduce the costs of recovery systems in addition to targeting the solid waste.
The objective of this study was to evaluate the productive, phytometric and
chlorophyll index of Marandu grass in recovery with doses of wood ash and forms of
application of the residue in pasture grown in Typic Quartzipsamment. The
experiment was conducted on field in an area cultivated with Marandu grass, at the
Instituto Mato-Grossense do Algodão (IMA). The experiment was conducted in the
rainy season for two consecutive years (2015 and 2016). Six doses of wood ash (0,
3, 6, 9, 12 and 15 t ha-1
) were applied with two forms of application, not incorporated
and incorporated into the soil with light offset disk harrow. The experimental design
was a randomized complete block design, with four replications. The main
experimental units (8x30m) received the doses of wood ash, while the application
form was allocated to the subplots (8x15m). Nitrogen fertilization was 100 kg ha-1
using as urea source, carried out in two years. Four cuttings of the plant material
were carried out, with 30 days intervals, the first one being carried out after 30 days
of the application of the wood ash. The cuts were performed using a base rectangle
in the dimensions of 1.00X0.25 m, with a height of 5 cm, cast in the useful area of
each subplot. The variables analyzed were: chlorophyll index, plant height, number of
leaves and tillers, shoot dry mass, leaves and stems + sheaths and dry mass
accumulation in the two years of pasture recovery. The data were submitted to
analysis of variance and when significant the doses of wood ash were submitted
regression analysis and the form of application of the residue to Tukey test, both up
to 5% of probability, through the statistical program SISVAR. The productive
characteristics of pasture in recovery were positively influenced by the fertilization
with wood ash at doses above 15 t ha-1 when incorporated into the soil in the
production of dry mass of the aerial part and for dry mass of leaves the management
that stood out was the not incorporated. The phytometric characteristics obtained
better results in the doses of wood ash above 9.86 t ha-1
in the handling incorporated
for the height of plants and not incorporated for number of tillers, the other variables
were influenced in the doses of wood ash up to 15 t ha
-1
. The doses and the forms of
application of vegetal ash influenced the development of the forage grass in the two
years of evaluations of the experiment.
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Citação
ESPIRITO SANTO, Éllen Souza do. Características produtivas e fitométricas de capim marandu em recuperação com doses de cinza vegetal e formas de aplicação. 2017. 60 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2017.