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Previous issue date: 2014-08-28 / O Brasil ? o segundo maior produtor de mandioca do mundo, da qual a maior
parte da produ??o ? utilizada para fabricar farinha e f?cula, gerando grande quantidade de
res?duo, a manipueira. Em geral, esse res?duo ? descartado diretamente no solo e cursos
d??gua, causando s?rios impactos ambientais. Diante disto, objetivou-se avaliar o uso de
?gua residu?ria da mandioca (manipueira) como fertilizante org?nico em pasto de
Brachiaria brizantha cv. Marandu. O experimento foi conduzido no Campus de Maca?ba da
Universidade Federal do Rio Grande do Norte. O delineamento experimental foi em blocos
ao acaso com seis tratamentos e quatro repeti??es. Os tratamentos utilizados foram doses
crescentes de manipueira (0; 15; 30; 60 e 120 m? ha-1
) e um tratamento com aduba??o
mineral (AM) na forma de NPK (140:30:120 kg ha-1
). Foram realizados tr?s cortes com
intervalo de 60 dias. As vari?veis avaliadas foram: altura da planta; ac?mulo de
componentes morfol?gicos da forragem; Intercepta??o de Luz (IL); ?ndice de ?rea Foliar
(IAF); Clorofila Total (CT); Produ??o de Mat?ria Seca (PMS). A produ??o de mat?ria seca
na dose de 120 m? ha-1
teve um acr?scimo quantitativo, totalizando uma produ??o de 2796
kg ha
-1
de MS no segundo corte, proporcionando um aumento de 493% em rela??o a
testemunha, e o efeito residual observado no terceiro corte promoveu um acr?scimo de 100
% quando comparado a ?0? m? ha-1
. Comparando-se a PMS obtida com a utiliza??o de AM
e os demais tratamentos observou-se que no segundo corte ela foi equivalente ? dose de 120
m? ha-1
e no terceiro corte a equival?ncia foi com as doses 60 e 120 m? ha-1
. Para as vari?veis
altura da planta, IL, IAF, CT e Massa de Folhas a adi??o de manipueira no solo promoveu
um aumento linear positivo para os tr?s cortes. Por?m, com a AM o IAF se mostrou superior
aos demais tratamentos. A massa de colmo atingiu sua maior produ??o (838 kg ha-1
de MS)
no segundo corte quando se utilizou a dose de 120 m? ha-1
. Na massa de material morto, no
segundo e terceiro cortes, verificou-se resposta linear positiva totalizando aumento de 322 e
452% respectivamente, em rela??o ? dose ?0? m? ha-1
. O uso da manipueira apresentou
efeito herbicida para a vari?vel massa das indesej?veis, resultando em resposta linear
negativa diminuindo a quantidade com o aumento das doses do res?duo. A manipueira pode
ser utilizada como fertilizante org?nico em pastagem de Brachiaria brizantha cv. Marandu
visando melhorias nas caracter?sticas produtivas, pois promoveu aumentos significativos na
maioria das vari?veis estudadas, principalmente na dose de 120 m? ha-1.
. / 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 Maca?ba 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 m? 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 m?ha-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 m? 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 m? ha-1 and the third
equivalence has been cut at doses 60 and 120 m?ha-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 m?ha-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 m?ha-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 m?ha-1
. This benefits the
environment by being alternative for disposal of cassava.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19874 |
| Date | 28 August 2014 |
| Creators | Bezerra, M?rcio Gleybson da Silva |
| Contributors | 96823216468, http://lattes.cnpq.br/0029507073767618, Oliveira, Ermelinda Maria Mota, 96835028491, http://lattes.cnpq.br/6957940488708665, Miranda, Neyton de Oliveira, 30341647004, http://lattes.cnpq.br/6580689264232001, Difante, Gelson dos Santos, Silva, Gualter Guenther Costa da |
| Publisher | Universidade Federal do Rio Grande do Norte, MESTRADO EM PRODU??O ANIMAL, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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