Floristic and Phytosociology of Weeds in Upland Rice in the Humid Tropics

Silva, M.R.M.; Costa, Elizabeth Araújo; Corrêa, Maria José Pinheiro; Rodrigues, Antônia Alice Costa; Mesquita, Mário Luiz Ribeiro

doi:10.1590/s0100-83582017350100083

Cited by 2 publications

(4 citation statements)

References 11 publications

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“…Studies conducted by Silva et al (2015), Silva et al (2017) and Costa et al (2018) in rice crop showed the diversity of weed species is elevated in this crop, also that the Poaceae and Cyperaceae families are the most relevant. , stated that the importance of the species of these families in rice crops derived from the fascicular root systems, making them more competitive, such as rice for water and nutrients.…”

Section: Resultsmentioning

confidence: 90%

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Weed Suppression With Babassu Straw and Spatial Rice Arrangement

Marinho

Santos²,

Nascimento³

et al. 2020

JAS

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Soil cover and spatial crop arrangement are practices that can suppress weeds. The study aimed to evaluate the babassu straw cover and the spatial arrangement of rice crops as weed control. The experiment was conducted in two rice arrangements spatial, the first, with a spacing of 35 cm and sowing density of 87 kg ha-1 (S35D87); and the second, with a spacing of 45 cm and sowing density of 68 kg ha-1(S45D68), and four amounts of babassu straw (0.0; 8.5; 12.5; and 16.5 t ha-1). Weed density, dry mass, phytosociology, and crop productivity were assessed. Babassu straw at 16.5 t ha-1 in the two crop arrangements reduced weed density from 66.8 to 76.2% and increased rice productivity. The most important weeds were Cyperus spp, Murdania nudiflora (L.) Brenan and Phyllanthus niruri L. Babassu straw cover and rice crop arrangement were efficient in the weeds suppression.

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Section: Resultsmentioning

confidence: 90%

“…Species of the genus Cyperus are among the most harmful weeds to cultivate rice (Silva et al, 2015;Silva et al, 2017;Costa et al, 2018) and babassu straw. It may reduce the IVI of these species at the beginning of crop growth, probably through the shading.…”

Section: Resultsmentioning

confidence: 99%

Weed Suppression With Babassu Straw and Spatial Rice Arrangement

Marinho

Santos²,

Nascimento³

et al. 2020

JAS

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“…It would also help to increase crop output and harvest quality. Typically, this information is obtained through phytosociological surveys, which include indices such as relative frequency, relative density, relative abundance, and relative importance (Silva et al, 2017). From this perspective, the most impacted component (frequency, density, and abundance) may provide evidence of how environmental agents interact with the weed population (Silva et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Typically, this information is obtained through phytosociological surveys, which include indices such as relative frequency, relative density, relative abundance, and relative importance (Silva et al, 2017). From this perspective, the most impacted component (frequency, density, and abundance) may provide evidence of how environmental agents interact with the weed population (Silva et al, 2017). Therefore, this study investigated weed composition, abundance, and distribution in a lowland environment with maize-based cropping systems.…”

Section: Introductionmentioning

confidence: 99%

Phytosociological survey of weeds in irrigated maize fields in a Southern Guinea Savanna of Nigeria

Salaudeen

Daniya²,

Olaniyi³

et al. 2022

Front. Agron.

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Maize is a food crop for millions of people in sub-Saharan Africa. However, severe weed infestation might cause significant yield loss. This study investigated weed composition, abundance and distribution in maize-based cropping systems in the Southern Guinea Savanna of Nigeria. Fields were surveyed between February and March 2022. The Importance Value Index (IVI) of each weed species was determined using relative frequency, relative density, and relative abundance. A total of 29 weed species from 15 families were identified. Poaceae (34.9 %) was the most prevalent weed family, followed by Cyperaceae (26.9 %) and Portulacaceae (12.8 %). The IVI showed that Cyperus rotundus (38.6), Portulaca oleraceae (29.4), Digitaria horizontalis (25.5), Brachiaria deflexa (24.2), Senna obtusifolia (17.6), Ageratum conyzoides (16.0), Cynodon dactylon (12.6), Phyllanthus niruri (11.1) and Eragrostis sp. (10.6) were the most dominant. Principal Component Analysis (PCA) ordination biplot revealed that Setaria pumila was strongly associated with sole maize cultivation, as was Desmodium scorpiurus with maize/rice intercropping, C. dactylon with maize/pepper, Euphorbia hirta with maize/cassava, and Cleome viscosa with maize/amaranthus intercropping. Special attention to these weed species is required when making an informed decision on the choice of weed control measures.to reduce yield losses in endemic areas.

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Floristic and Phytosociology of Weeds in Upland Rice in the Humid Tropics

Cited by 2 publications

References 11 publications

Weed Suppression With Babassu Straw and Spatial Rice Arrangement

Weed Suppression With Babassu Straw and Spatial Rice Arrangement

Phytosociological survey of weeds in irrigated maize fields in a Southern Guinea Savanna of Nigeria

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