Made available in DSpace on 2016-08-12T19:18:27Z (GMT). No. of bitstreams: 1 LeonardoBT_TESE.pdf: 645262 bytes, checksum: cb8927bd356a80ce69fa745400bf047e (MD5) Previous issue date: 2014-04-04 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The objective of this work was to verify the effects of the combination between weeds and intercropping with gliricídia (thirty viable seeds m-2 broadcast) on the weed and corn yields. Completely randomized blocks design with four repetitions in subdivided parts was used. Hybrids (AG 1051 e BR 205) were cultivated in the parcels, and in the subportions the following treatments were applied: two weeds (twenty and forty days after corn sowing); a weed accomplishing 20 days after corn sowing + gliricídia sowing after weed; gliricídia sowing on the occasion of the corn sowing + weed accomplishing forty days after corn sowing; gliricídia sowing on the occasion of corn sowing; without weed. There was among hybrids with respect to baby corn, green spike and grains. The greatest yields were obtained through the treatment with two weeds, but the execution of a weed 20 days after corn sowing + gliricídia sowing after weed did not differ with respect to the yield of these three products according the weeds. Gliricídia sowing on the occasion of the sowing corn + weed after did not differ from the weeds with respect to the green spikes yield. Gliricídia sowing on the occasion of the corn sowing allowed averages superior to the treatment without weed and in some growth character and corn yield. Therefore, gliricídia controlled weed partially and its combination with weed has benefits / O objetivo do trabalho foi verificar os efeitos da combinação de capinas e consorciação com a gliricídia (30 sementes viáveis m-2 semeadas a lanço) no controle de plantas daninhas e nos rendimentos do milho. Utilizou-se o delineamento de blocos completos casualizados com quatro repetições em parcelas subdivididas. Os híbridos (AG 1051 e BR 205) foram cultivados nas parcelas, e nas subparcelas foram aplicados os tratamentos: duas capinas (20 e 40 dias após a semeadura do milho, DASM); realização de uma capina aos 20 DASM + semeadura da gliricídia após a capina; semeadura da gliricídia por ocasião da semeadura do milho + realização de capina aos 40 DASM; semeadura da gliricídia por ocasião da semeadura do milho; sem capinas.Não houve diferenças entre híbridos quanto aos rendimentos de minimilho, espigas verdes e grãos.Os maiores rendimentos foram obtidos com o tratamento de duas capinas, mas a realização de uma capina aos 20 DASM + semeadura da gliricídia após a capina, não diferiu das duas capinas quanto aos rendimentos desses três produtos. A semeadura da gliricídia por ocasião da semeadura do milho + realização de capina aos 40 DASM não diferiu das duas capinas quanto ao rendimento de espigas verdes. A semeadura da gliricídia por ocasião da semeadura do milho propiciou médias superiores ao tratamento sem capina em algumas características do crescimento e dos rendimentos do milho. Portanto, a gliricídia controla parcialmente as plantas daninhas e a combinação dela com capinas apresenta vantagens

Maize (Zea mays L.) ranks third as a food crop after wheat and rice and is characterized not only as a cereal crop but also as a vegetable. Maize used as a vegetable is known as “baby corn”. Baby corn consists of unfertilized young ears harvested 2 or 3 days after silk emergence. The present study was implemented in 2009 at Western Kentucky University Agriculture Research and Education Center (36.93 N, 86.47 E) in Bowling Green, Kentucky. The purpose of the study was to compare the effect of different schemes of harvest on baby corn (BC) yield, grain maize (GM) yield, and estimated economic return. Experimental harvest treatments were 1) no BC harvest, only GM harvest, 2) first harvest as BC, final harvest as GM, 3) first and second harvests as BC, final harvest as GM, and 4) first, second, and third harvests as BC, final harvest as GM. Average estimated BC yields (Kg/ha) for Treatments 2, 3, and 4 were 1445.1, 2681.8, and 3437.5; GM yields (Kg/ha) for Treatments 1, 2, and 3 were 12522.2, 8226.5, and 1380.9; respectively. Since few grain kernels were found after three harvests for BC (Treatment 4), no usable GM yield was produced. BC and GM yields were used for evaluating the economic returns. Results indicated that the sequence of best economic returns would be obtained by harvesting BC three times (Treatment 4), first two harvests for BC and the final for GM (Treatment 3), first harvest for BC and subsequent for GM (Treatment 2), and only for GM harvest (Treatment 1). Although the pattern for only BC harvest was the most profitable system, the human labor requirement and critical timing of harvest limited its production. In states similar to Kentucky, BC could only be grown as an additional crop or to supplant a limited amount of traditional GM hectarage.