Weed Community in a Raw Sugarcane Renovation Area Submitted to Different Soil Managements

Soares, Maria Beatriz Bernades; Bianco, S.; Finoto, Everton Luís; Bolonhezi, Denizart; Albuquerque, J.A.A.; Silva, Antônio Alberto da

doi:10.1590/s0100-83582016340100009

Cited by 8 publications

(6 citation statements)

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“…These data corroborate results reported by this study regarding the lower density of Oryza sativa in this system ( Table 2). Systems that maintain soil cover, such as minimum tillage and direct sowing, affect the development of gramineous plants (SOARES et al, 2016). Infestation by these species virtually disappears when soil management is conservative.…”

Section: Resultsmentioning

confidence: 99%

“…They decreased up to S5 from 164 (average S1 and S2) to 79 (average S3, S4 and S5) plants m -2 , depending on the increase in the system diversification (Table 3), showing the importance of crop rotation to weed management. Studies of direct sowing fields with Arachis hypogaea L. crop rotation, in which Cyperus rotundus L. stood out among the weeds, showed that conservative soil management and crop rotation mitigated problems resulting from this species (SOARES et al, 2016). This result may be attributed to the fact that some species, such as C. rotundus, are more sensitive to light, which interferes in the germination of their propagules (ALBUQUERQUE et al 2013).…”

Section: Resultsmentioning

confidence: 99%

“…Systems with minimum tillage and direct sowing are able to decrease the general density of weeds, by comparison with the conventional system (VERNETTI JUNIOR et al, 2005). Studies of Arachis hypogaea L. showed that the use of direct sowing can decrease the number of weeds in 40%, both in fallow lands and in areas of peanut cultivation (SOARES et al, 2016). Crop rotation, with the help of direct sowing, can become an excellent tool to manage seedbanks.…”

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confidence: 99%

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Weed phytosociological in irrigated rice under different cultivation systems and crop rotation intensity

et al. 2018

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This research aimed to evaluate the phytosociology of weeds in irrigated rice in different soil management systems and crop rotation intensity. Therefore, two field studies were carried out. Study 1 was conducted in an area that has been cultivated since 1994 with three cultivation systems: direct, pre-germinated and conventional ones. Study 2 was carried out in an experimental area in five Integrated Farming Systems, with crop rotation. Phytosociological evaluations were conducted when rice was fully blooming, in the first study, and when grain filling was ending, in the second study. Pre-germinated system of rice cultivation has predominance of aquatic weeds. Conventional system when compared with direct sowing has lower weed densities. Integrated Agricultural Production Systems with higher intensity of crop rotation have been higher infested of perennial species.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: ------------------------------------------------------------mentioning

confidence: 99%

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Weed phytosociological in irrigated rice under different cultivation systems and crop rotation intensity

et al. 2018

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“…A espécie Ipomoea hederifolia esteve presente em todos os tratamentos, enquanto a espécie Coniza bonariensis foi encontrada apenas no tratamento 1 e, Mucuna aterrima apenas no tratamento 4 e Diodella teres e Setaria parviflora foram exclusivas ao tratamento 2. De maneira geral as áreas de plantio direto apresentam menor número de plantas daninhas e maior riqueza de espécies, enquanto no plantio convencional espécies problemáticas costumam sobressaírem-se (SOARES et al,2016). Na Tabela 5 é possível observar os dados de número de plantas daninhas por m² e massa seca de plantas daninhas por m².…”

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Managements to Destruction of Sugarcane Ratoon in Weeds and Agronomic Performance of Soybeans Sowed in Succession

Júnior¹,

Soares²,

Sousa

et al. 2017

Nucleus

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RESUMO:Objetivou-se com o presente trabalho avaliar, a produtividade de 2 cultivares de soja, BMX Classe RR e NS 7667 IPRO, e as características das plantas daninhas em área de reforma de canavial sob diferentes manejos da soqueira da cana-de-açúcar. O experimento foi conduzido no Polo Regional Centro Norte, localizado no município de Pindorama, SP. A área experimental tem solo caracterizado como Argissolo, considerado profundo, com horizonte A arenoso e horizonte B textural. Os tratamentos foram: 1: Roçagem pré-semadura, 2: Dessecação 10 dias após semeadura, 3: Dessecação 1 dia após semeadura, 4: Gradagem sem dessecação, 5: Dessecação 1 dia antes da semeadura, 6: Dessecação prévia (15 dias) + gradagem, 7: Dessecação prévia (15 dias). Para as cultivares de soja avaliou-se o estande final de plantas, características agronômicas tais como: altura de planta, altura de inserção da 1ª vagem e produtividade de grãos, enquanto que para as plantas daninhas aos 125 dias após a semeadura da soja foram amostrados ao acaso 5 pontos de 1m² por parcela, contando-se o número de plantas daninhas e se retirando a massa seca da parte aérea. Os tratamentos que consistiram na semeadura sobre o palhiço de cana obtiveram maior produtividade para as duas cultivares estudadas. A dessecação 10 dias após a semeadura destacou-se com relação à altura de plantas e de inserção da 1ª vagem, sendo compatível a colheita mecanizada para as cultivares BMX Classe RR e NS 7667 IPRO, entretanto diminuiu a eficiência do herbicida, sendo nesse caso a dessecação prévia da soqueira à semeadura mais indicada para o controle das plantas daninhas, independente do manejo de solo adotado. O uso de roçada para erradicação das soqueiras em sistema de plantio direto é eficiente no controle de plantas daninhas sem afetar a produtividade da soja.Palavras-chave: Plantio Direto. Reforma de canavial. Glycine max. Glyphosate. Roçagem MANAGEMENTS TO DESTRUCTION OF SUGARCANE RATOON IN WEEDS AND AGRONOMIC PERFORMANCE OF SOYBEANS SOWED IN SUCCESSION SUMMARY:The objective of this study is to evaluate the effect of different managements of sugarcane ratoon on the productivity of two soybean cultivars, BMX Class RR and NS 7667 IPRO and tha weed control in soybean crop sowed in succession during the reform of the sugarcane plantation. The experiment was conducted in the North Center Pole, linked to the Agência Paulista de Tecnologia of Agribusiness in the municipality of Pindorama, São Paulo, in area of five cuts sugarcane, desiccation and destruction of ratoons has been carried out according to each treatment: 1-Pre-sowing trim in no-tillage; 2-Desiccation 10 days after sowing in no-tillage; 3-desiccation 1 day after sowing in no-tillage; 4-Grading without desiccation in conventional planting; 5-Desiccation 1 day before no-tillage; 6-Prior desiccation (15 days) + conventional planting and 7-Prior desiccation (15 days) in no-tillage. For soybean cultivars, agronomic characteristics such as: plant height, insertion height, and productivity were evaluated, whereas for weeds at...

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“…Weed communities are affected by various factors, including climate, soil type, soil weed seed bank, planting and production systems adopted, and crop development (Albuquerque et al, 2012). Changes in the soil management system generally influence weed density and diversity (Soares et al, 2016). Phytosociological surveys are useful tools for understanding the dynamics of weed species and their interaction with management systems and agricultural practices (Carvalho and Pitelli, 2012;Concenço et al, 2013).…”

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Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds

Werle¹,

Zanon²,

Streck³

et al. 2021

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This study aimed to assess the phytosociology of weeds as a function of different crop management technology levels in cassava production. Field experiments were conducted in Santa Maria (29°41′03″ S; 53°48′25″ W) and Itaqui (lat. 29°07′31″ S; long. 56°33′11″ W), Rio Grande do Sul, Brazil. Treatments consisted of three technology levels: low (postemergence weeding without basal dressing); medium (weeding performed at 7 and 40 days after planting and fertilization with 6.25, 25, and 25 kg⋅ha−1 of N, P, and K, respectively); and high (postemergence application of s-metolachlor; 1250 kg⋅ha−1 of lime and 12.5, 50, and 50 kg⋅ha−1 of N, P, and K, respectively). Weed frequency, density, relative abundance, and importance values were calculated for each location. Then, locations were compared using a dissimilarity matrix. Weed density and diversity decreased linearly as technology levels increased. The predominant weed species found in Itaqui and Santa Maria belong to the Poaceae family. Itaqui presented highest weed diversity among the locations. The genus Cyperus had the highest importance value index in Santa Maria. The use of S-metolachlor at the high technology level provided a lower frequency and lower diversity of weed species than did levels without chemical control in Itaqui and Santa Maria.

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Weed Community in a Raw Sugarcane Renovation Area Submitted to Different Soil Managements

Cited by 8 publications

References 13 publications

Weed phytosociological in irrigated rice under different cultivation systems and crop rotation intensity

Weed phytosociological in irrigated rice under different cultivation systems and crop rotation intensity

Managements to Destruction of Sugarcane Ratoon in Weeds and Agronomic Performance of Soybeans Sowed in Succession

Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds

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