Água residuária da mandioca como fertilizante orgânico em pasto de Brachiaria brizantha cv. Marandu
Brazil is the world's second largest producer of cassava, which most of the production is used to make flour and starch, generating large amounts of waste, cassava. In general, this waste is disposed of directly into the soil and waterways, causing serious environmental impacts. In view of t...
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Formato: | Dissertação |
Idioma: | por |
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Universidade Federal do Rio Grande do Norte
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Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/19874 |
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Resumo: | Brazil is the world's second largest producer of cassava, which most of
the production is used to make flour and starch, generating large amounts of waste,
cassava. In general, this waste is disposed of directly into the soil and waterways,
causing serious environmental impacts. In view of this, the aim of this work was to
evaluate the use of cassava wastewater water (cassava) as organic fertilizer in
Brachiaria brizantha pasture. Marandu. The experiment was conducted at the
Campus Macaíba the Federal University of Rio Grande do Norte. The treatments
were increasing rates of cassava, applied to the soil as organic fertilizer. The
experimental design was a randomized block design with six treatments and four
replications. The treatments consist of cassava doses (0, 15, 30, 60 and 120 m³ ha-
1
) and a treatment with mineral fertilizer (AM) in the form of NPK (140: 30: 120 kg
ha-1
). Three cuts with an interval of 60 days were carried out. The variables
evaluated were: plant height; accumulation of morphological components of fodder;
Trapping Light (IL); Leaf Area Index (LAI); Total chlorophyll (CT); Feature
Production Seca (PMS). The dry matter production at a dose of 120 m³ha-1
had a
quantitative increase, with a total production in 2796 kg ha-1 DM in the second cut,
providing an increase of 493% compared to control, and the residual effect
observed in the third cut caused a 100% increase compared to 0 m³ ha-1
.
Comparing the PMS obtained with the use of AM and other treatments it was
observed that it was the second cut equivalent to a dose of 120 m³ ha-1 and the third
equivalence has been cut at doses 60 and 120 m³ha-1. For the variables plant
height, IL, IAF, CT and leaves Mass adding cassava in the soil promoted a positive
linear increase for the three cuts. However, with the AM the IAF was superior to the
other treatments. The thatched mass reached its highest production (838 kg ha-1
DM) in the second cut when using a dose of 120 m³ha-1
. In dead material mass in
the second and third sections, there was increased linearly increased total of 322
and 452% respectively, compared to a dose of 0 m³ha-1
. The use of cassava
showed herbicidal effect for the variable mass of the undesirable negative linear
response resulting in decreasing the amount of residue with increasing doses.
Manipueira can be used as organic fertilizer in Brachiaria brizantha cv. Marandu for
improvements in the productive characteristics, as promoted significant increases in
8
most of the variables studied, especially at a dose of 120 m³ha-1
. This benefits the
environment by being alternative for disposal of cassava. |
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