Adubação e o período anterior à interferência das plantas daninhas na cultura do amendoim

Yamauti, Micheli Satomi; Alves, Paulo Roberto Arruda; Nepomuceno, Mariluce Pascoína; Martins, José Valcir Fidelis

doi:10.1590/s0100-83582010000500011

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…Competition causes direct losses on the crop, reducing qualitatively and quantitatively the productivity, raising the operational costs of harvesting and prejudicing the grain drying (Nepomuceno, Alves, Dias, Cardozo, & Pavani, 2007). Some authors emphasized that weed infestation in peanut crops may cause reductions varying from 31 to 92% (Nepomuceno et al, 2007;Agostinho, Gravena, Alves, Salgado, & Mattos, 2006;Yamauti, Alves, Nepomuceno, & Martins, 2010), and this interference grade is dependent on cultivar, spacing, density and coexistence period, which may be modified by climate conditions and the cultural traits used (Pitelli, 1985).…”

Section: Introductionmentioning

confidence: 99%

Herbicide Selectivity in Peanut Cultivars

Zanardo¹,

Carrega²,

Hijano³

et al. 2018

JAS

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Weed interference is one of the main factors responsible for reducing the productivity of the peanut crop. Among weed control methods, the chemical is considered one of the main tools, however, the herbicides registered for this crop are scarce. The objective of this study was to evaluate the selectivity of herbicides applied in post-emergence in Runner peanut cultivars. For this, an experiment was performed in an 11x5 factorial scheme, meaning 10 herbicides plus one control (without herbicide) and five peanut cultivars, with four replicates. Visual evaluations of phytointoxication were carried out at 7, 14 and 21 days after application of the herbicides. At the end of the experiment, was determined the dry mass of aboveground and root parts. ) have potential to be used for all the peanut cultivars studied. Herbicides hexazinone (2.50 kg ha-1), amicarbazone (2.00 kg ha ) must not be indicated, at these doses, for post-emergence spraying in the evaluated cultivars. The genotypes do not react equally to certain products, therefore, there is a need for further studies the at field conditions to attest the responses obtained in the present study and verify that the yield potential is not affected.

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Section: Introductionmentioning

confidence: 99%

Herbicide Selectivity in Peanut Cultivars

Zanardo¹,

Carrega²,

Hijano³

et al. 2018

JAS

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“…A interferência causada pala competição de plantas daninhas com a cultura do amendoim pode causar severasreduçõesno rendimento (AGOSTINHO et al, 2006;YAMAUTI et al, 2010). As plantas daninhas competem diretamente por recursos vitais com a cultura como, água, luz e nutrientes (GIMENES et al, 2011).…”

Section: Introductionunclassified

Método De Quantificação Da Cobertura Verde Fracionada Em Cultivares De Amendoim Com Interferência De Planta Daninha

França

Carrega

Lima

et al. 2018

Encontro Sobre a Cultura Do Amendoim

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RESUMO: O uso de aplicativos tem sido uma opção viável para auxiliar no campo de produção de várias culturas. Por isso, este trabalho teve como objetivo avaliar a eficiência do aplicativo Canopeo © em estimar a supressão imposta pela presença da mucuna-preta (Mucuna aterrima) em cultivares de amendoim, com intuito de quantificar de forma fracionada a porcentagem de biomassa das plantas.Realizou-se um experimento em delineamento em blocos casualizados, tendo como tratamentos cinco cultivares (IAC 503, IAC 505, IAC OL3, IAC OL4 e IAC OL5) com e sem a presença da mucunapreta, com 4 repetições. Para quantificar a cobertura verde fracionada, utilizou-se o aplicativo Canopeo © , que baseia-se na leitura de imagens por colorimetria, oferecendo resultados in situ precisos

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Herbage Responses to Dogfennel Cover and Limited Nitrogen Fertilization in Bahiagrass Pastures

et al. 2018

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Core Ideas Dogfennel ground cover negatively impacted bahiagrass herbage responses. Bahiagrass provided satisfactory herbage mass in areas with low dogfennel cover in May and June. Limited N fertilization did not change the herbage dynamics of bahiagrass stands competing with varying percentages of dogfennel cover. Further research should be conducted with additional bahiagrass cultivars, soil types, and N fertilizer rates. Nitrogen fertilization is an important management practice in bahiagrass (Paspalum notatum Fluegg) pastures; however, the use of N has been limited in forage‐based livestock systems in Florida. Dogfennel [Eupatorium capillifolium (Lam.) Small] is currently the most common broadleaf weed in bahiagrass pastures. We hypothesize that limited N fertilization might exacerbate dogfennel competition leading to greater declines of bahiagrass herbage responses. Field experiments were conducted in 2007 and 2008 to quantify the effects of dogfennel‐free, low, medium, and high dogfennel cover (0, 1 to ≤25, 26 to 74, and ≥75%) and limited N fertilization (56 kg N ha−1 yr−1) on bahiagrass herbage mass (HM), dogfennel biomass, bahiagrass herbage accumulation (HA) reduction, and bahiagrass crude protein (CP) concentration. Dogfennel biomass was greater for N‐fertilized plots vs. non‐fertilized plots at all monthly evaluations. Bahiagrass HM was satisfactory when dogfennel cover was low early in growing season; however, bahiagrass HM was 29 to 60% and 43 to 71% less in medium and high cover plots, respectively than dogfennel‐free plots. Conversely, bahiagrass CP was negatively affected by dogfennel only when harvested in June and July. Bahiagrass HA reduction increased as dogfennel cover increased in both years. Results from these field trials suggested that dogfennel cover negatively impacted bahiagrass herbage responses, except for low dogfennel cover early in the growing season. Additionally, limited N fertilization did not change the herbage dynamics of bahiagrass stands competing with varying percentages of dogfennel cover. Further research should evaluate additional bahiagrass cultivars, soil types, and N fertilizer rates.

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Adubação e o período anterior à interferência das plantas daninhas na cultura do amendoim

Cited by 4 publications

References 16 publications

Herbicide Selectivity in Peanut Cultivars

Herbicide Selectivity in Peanut Cultivars

Método De Quantificação Da Cobertura Verde Fracionada Em Cultivares De Amendoim Com Interferência De Planta Daninha

Herbage Responses to Dogfennel Cover and Limited Nitrogen Fertilization in Bahiagrass Pastures

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