Influence of corn sowing density and gliricidia intercropping on weed control

Silva, P.S.L.; Souza, Aline Danielle de; Paula, Vericia Fernanda Sales de; Oliveira, Fábio Henrique Tavares de; Silva, K.M.B.

doi:10.1590/s0100-83582010000200006

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…Increased seeding densities in annual crops frequently reduce weed growth, as it has been noted for corn (Silva et al, 2010b). Little has been reported on the relationship between planting density and weed growth for perennial plants grown as monocrops.…”

Section: Planting Densitiesmentioning

confidence: 99%

“…Such relationship is unexpected, since it has been observed that gliricidia controls weed growth (Silva et al, 2010b). Possibly, gliricidia controls the growth of some species, but it may be even beneficial to others through a process known as facilitation (Callaway, 1995).…”

Section: Planting Densitiesmentioning

confidence: 99%

“…The reduced shading provided by the small tree canopies may exert little weed competition for light. In spite of that, there is evidence that gliricidia can control weeds when competing with them even at early growth stages, probably due to allelopathy (Silva et al, 2010b). Weeds under the canopies of tree species submitted to different ...…”

Section: Tree Intercroppingmentioning

confidence: 99%

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Weeds under the canopies of tree species submitted to different planting densities and intercropping

Souza¹,

Silva

Oliveira

et al. 2013

Planta daninha

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Assessing the growth and floristic composition of species that grow under the canopy of trees is important for weed control (WC). The objective of this study was to assess two experiments (E1 and E2), when the trees were two years and one year of age, respectively. In E1, sabiá (S) and gliricidia (G) were submitted to planting densities from 400 to 1.200 plants ha-1. In E2, growing systems consisting of S, G, and neem (N) combinations were compared: SSS, GGG, NNN, GSG, NSN, SGS, NGN, SNS, and GNG (each letter represents a row of plants). A random block design was adopted, with three (E1) and four (E2) replicates. In E1, treatments were arranged as split-plots (species in plots). In E2, the degrees of freedom for treatments (8) were partitioned into growing systems (treatments that involved the same species) and between growing system groups (2). Twenty-one weed species were found in E1. Gliricidia attained greater plant height than sabiá, but these species did not differ in canopy diameter, number of weed species per plot, and weed green and dry biomass of the shoot. Higher planting densities resulted in the reduction of all those traits. Twenty-six weed species were found in E2. Growing systems that included gliricidia showed canopies with greater diameters than growing systems that included neem. There were no differences between growing systems for number of weed species per plot and for weed green and dry biomass of the shoot.

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Section: Planting Densitiesmentioning

confidence: 99%

Section: Planting Densitiesmentioning

confidence: 99%

Section: Tree Intercroppingmentioning

confidence: 99%

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Weeds under the canopies of tree species submitted to different planting densities and intercropping

Souza¹,

Silva

Oliveira

et al. 2013

Planta daninha

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Weed control in corn and weed sample size for growth evaluations

et al. 2014

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-The objectives of this study were to evaluate baby corn yield, green corn yield, and grain yield in corn cultivar BM 3061, with weed control achieved via a combination of hoeing and intercropping with gliricidia, and determine how sample size influences weed growth evaluation accuracy. A randomized block design with ten replicates was used. The cultivar was submitted to the following treatments: A = hoeings at 20 and 40 days after corn sowing (DACS), B = hoeing at 20 DACS + gliricidia sowing after hoeing, C = gliricidia sowing together with corn sowing + hoeing at 40 DACS, D = gliricidia sowing together with corn sowing, and E = no hoeing. Gliricidia was sown at a density of 30 viable seeds m -2 . After harvesting the mature ears, the area of each plot was divided into eight sampling units measuring 1.2 m 2 each to evaluate weed growth (above-ground dry biomass). Treatment A provided the highest baby corn, green corn, and grain yields. Treatment B did not differ from treatment A with respect to the yield values for the three products, and was equivalent to treatment C for green corn yield, but was superior to C with regard to baby corn weight and grain yield. Treatments D and E provided similar yields and were inferior to the other treatments. Therefore, treatment B is a promising one. The relation between coefficient of experimental variation (CV) and sample size (S) to evaluate growth of the above-ground part of the weeds was given by the equation CV = 37.57 S Keywords: Zea mays, Gliricidia sepium, integrated control, hoeing, intercropping, corn yield. CV = 37,15 RESUMO -O presente trabalho teve como objetivos avaliar os rendimentos de minimilho, de milhoverde e de grãos da cultivar BM 3061, com o controle de plantas daninhas feito pela combinação de capinas + consorciação com gliricídia, e verificar como o tamanho da amostra influencia a precisão da avaliação do crescimento das plantas daninhas. Utilizou-se o delineamento de blocos casualizados com dez repetições. O cultivar foi submetido aos tratamentos: A = capinas aos 20 e 40 dias após a semeadura do milho (DASM); B = capina aos 20 DASM + semeadura de gliricídia após a capina

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Mimosa caesalpiniifolia intercropping, weeds removal and nitrogen fertilization on maize

et al. 2016

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Weeding is expensive and laborious, and some weeds may re-establish themselves afterwards. Arboreal leguminous plants can control weeds, and fertilization with nitrogen can increases the competitive ability of the maize. The aim of this work was to evaluate the effects of weed-removal and intercropping with sabiá (Mimosa caesalpiniifolia) on control of weed plants and maize productivity. A randomized complete block design in a split-plot arrangement was used with five replications. Cultivar AG 105, fertilized with nitrogen (30 and 120 kg/ha of N applied to the plots) was subjected to the following treatments (subplots): A) no weeding; B) intercropping with sabiá (30 viable seeds/m2, broadcast between the rows of maize); C) hoeing {20 and 40 days after sowing (DAS)} with no removal of weeds (nROW); D) two hoeings at 20 and 40 DAS with ROW at 20 DAS; E) two hoeings at 20 and 40 DAS with ROW at 40 DAS; F) and two hoeings at 20 and 40 DAS with ROW after each hoeing. Increasing the dose of nitrogen reduced the growth of the sabiá (30%) and weeds (32%) and increased the corn green ear yield (115%) and grain yield (40%) of maize. Sabiá did not reduce the growth of weeds, but it was beneficial to corn because increased the number of green ears. Carrying out two hoeings, with or without the removal of weeds, reduced weed growth (92%) and provided the highest yields of green ears (5.6 t/ha) and grains (6.0 t/ha).

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Influence of corn sowing density and gliricidia intercropping on weed control

Cited by 3 publications

References 22 publications

Weeds under the canopies of tree species submitted to different planting densities and intercropping

Weeds under the canopies of tree species submitted to different planting densities and intercropping

Weed control in corn and weed sample size for growth evaluations

Mimosa caesalpiniifolia intercropping, weeds removal and nitrogen fertilization on maize

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