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Previous issue date: 2006-04-27 / Organic systems were evaluated for cassava root production directed to human comsuption in
natura, at Serop?dica, Metropolitan Region of Rio de Janeiro State. Treatments consisted of:
cassava ('IAC 576-70') single cropping and its intercropped with corn ('Eldorado'), cowpea
('Mau?') or corn plus cowpea. The organic management was standardized and the
experimental area was submitted to artificial irrigation. Several phenological features were
considered in the evaluations relating all three species under cultivation. Green (immature)
corn ears were harvested at the point requiered for fresh marketing. The cowpea was
included to function as green manure being cut at flowering and left on the soil surface. Both
(corn and cowpea) species were sown between cassava rows, in an alternate design, following
the first weeding of the main crop (cassava). The cultivar IAC 576-70 showed suitability with
respect to organic management averaging approx. 31 Mg.ha-? of marketable roots. No
significant differences were detected between cassava single cropping and any of the
intercropping tested systems. Thus, the corn crop represented potential for additional income
to the growers. Yield of Eldorado corn averaged 18.125 ears.ha-? correspponding to 5,1
Mg.ha-?. The harvested ears measured 19,5 cm of length by 4,5 cm of basal diameter (mean
values) reaching the requirements for marketing, despite a certain frequency of grain failures
at the apical end. Residues coming from cowpea cutting brought about an input close to 12
Mg.ha-1, which meant an expressive contribution in nutrient elements, specially nitrogen
(about 44 kg N.ha-1). The legume crop, in addition, completely covered cassava inter-rows
demonstrating its potential for controlling erosion and weeds. / Foram avaliados sistemas org?nicos de produ??o de mandioca para consumo humano in
natura (aipim de mesa), em Serop?dica, Regi?o Metropolitana do Estado do Estado do Rio de
Janeiro. Os tratamentos consistiram de: monocultivo da mandioca (cv. IAC 576-70) e de seus
cons?rcios com o milho (cv. Eldorado), com o caupi (cv. Mau?) e com milho+caupi. O
manejo org?nico foi padronizado e a ?rea experimental foi artificialmente irrigada. Foram
considerados nas avalia??es diversos par?metros fenol?gicos referentes ?s tr?s esp?cies
cultivadas. Do milho, foram colhidas espigas verdes (imaturas) no ponto apropriado para
comercializa??o como tal. O caupi foi inclu?do como adubo verde, cortado na flora??o e
deixado na superf?cie do solo. Ambos os consortes ocuparam as entrelinhas da mandioca, de
modo alternado, sendo semeados ap?s a primeira capina da cultura principal. A cultivar IAC
576-70 mostrou-se adaptada ao manejo org?nico, com produtividade m?dia em ra?zes de
padr?o comercial pr?xima a 31 Mg.ha-?. N?o houve diferen?as significativas entre o
monocultivo e os tr?s tipos de cons?rcio testados. Desse modo, a inclus?o do milho
representou potencial de renda adicional ao produtor. A produ??o comercial da cv. Eldorado
(m?dia) situou-se em 18.125 espigas.ha-?, o que correspondeu a 5,1 Mg.ha-?. Embora
apresentando, com certa freq??ncia, falhas de grana??o na extremidade apical, as espigas
foram adequadas para o mercado, medindo, em m?dia, 19,5 cm de comprimento por 4,5 cm
di?metro basal. Os res?duos provenientes da ro?ada do caupi representaram um aporte de
biomassa da ordem de 12 Mg.ha-?, com uma expressiva contribui??o em macronutrientes,
sobretudo o nitrog?nio (cerca de 44 kg de N.ha-1). A leguminosa, em adendo, dominou e
cobriu as entrelinhas da mandioca, demonstrando seu potencial de controle ? eros?o e plantas
espont?neas.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:tede/505 |
| Date | 27 April 2006 |
| Creators | Devide, Antonio Carlos Pries |
| Contributors | Ribeiro, Raul de Lucena Duarte |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Curso de P?s-Gradua??o em Fitotecnia, UFRRJ, Brasil, Ci?ncias Agr?rias |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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