Fitossociologia de plantas daninhas do cafezal consorciado com leguminosas

Moreira, Guilherme Musse; Oliveira, R. N.; Barrella, Tatiana Pires; Fontanétti, Anastácia; Santos, Ricardo Henrique Silva; Ferreira, F.A.

doi:10.1590/s0100-83582013000200010

Cited by 8 publications

(9 citation statements)

References 11 publications

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“…Although D. horizontalis has completely disappeared from both areas, Brachiaria plantaginea was solely responsible for 75% and 52% of the Importance Value, respectively for the monocrop and intercrop systems; and G. coarctatum was also responsible for 47% of the Importance Value in the shaded, intercrop environment (Table 1). B. plantaginea occurs as a weed species in coffee plantations in Brazil (Moreira et al, 2013), demanding high light intensities for its emergence and development (Silva & Silva, 2007;Mondo et al, 2010).…”

Section: Phytosociologymentioning

confidence: 99%

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

et al. 2014

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-We aimed with this study to compare weed infestation in coffee under two different cropping managements: conventional coffee grown alone, or intercropped with banana plantation in a year-round basis (late spring, late summer, late fall and late winter). The experiment was installed in 2009 under field conditions at the Escola Municipal Rural Benedita Figueiró de Oliveira, in the city of Ivinhema in the state of Mato Grosso do Sul, Brazil. Assessments of weed occurrence were made three years after employment, on both cropping systems, and density, frequency, dominance and the importance value for each plant species in each system and season were quantified. Plant diversity within each system was estimated by Simpson and Shannon-Weiner indexes. Similarity between cropping systems were also assessed by the binary asymmetric similarity coefficient of Jaccard. Absolute infestation and spontaneous species differed between the two cropping systems in all seasons. Overall species diversity is higher in the monocrop compared with the intercrop, and it is associated in this study with the higher incidence of troublesome species. Areas were similar in terms of weed composition only in the Fall. Shading provided by the banana trees shows to be an efficient culture management aiming to suppress weeds in agro-ecological planting systems.Keywords: weed occurrence, intercrops, phytosociology. RESUMO -Objetivou-se com este trabalho comparar a infestação de plantas daninhas em café sob dois manejos de cultivo diferentes: café convencional cultivado isoladamente (solteiro) e em consórcio com banana (final da primavera, fim do verão, outono e final do inverno). O experimento foi instalado em 2009, em condições de campo, na Escola Municipal Rural

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Section: Phytosociologymentioning

confidence: 99%

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

et al. 2014

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“…The species of the genus Cyperus have a great competitive capacity, which can be found affecting different cultures, these weeds have wide adaptation, being found in all types of soil and climate, in addition, it has good dissemination with both sexual and asexual reproduction (Monquero, 2014). The importance of C. rotundus is even more evident as it is a kind of difficult chemical and/or mechanical control (Moreira et al, 2013) In the drip irrigated area, 27 of the 33 species identified were found throughout and all surveys, of these, highlighted the Amaranthus spp. and the E. hirta that were present in the field throughout the year with a greater number of individuals per species in all seasons.…”

Section: Resultsmentioning

confidence: 99%

Phytosociological Survey of Weeds in Coffee Plants Irrigated Under Different Systems

Oliveira¹,

Carvalho²,

Aspiazú³

et al. 2020

JAS

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The objective was to identify the species and quantify the importance value index of weeds in the cultivation of arabica coffee in two irrigation systems, at different times of the year, in the northern region of Minas Gerais. A phytosociological survey was carried out in each season of the year (spring, summer, autumn and winter) in an area cultivated with the species Coffea arabica, subjected to two irrigation systems (sprinkling and dripping). The coffee crop was implanted at a spacing of 3.5 m between rows and 0.7 meters between plants. The collection of weeds was performed using the standard method of the square inventory, which was launched between the lines of the crop. The identification of the species was carried out, the number of individuals was quantified, the dry mass, frequency, density, abundance, importance value index and coverage, and the similarity index. 33 weed species were identified, being the species with the highest IVI Euphorbia hirta, Brachiaria plantaginea, Digitaria horizontalis, Cyperus rotundus and Amaranthus spp. It was observed a higher occurrence of weeds from the monocot group in the sprinkler irrigation system while in the drip there were predominance of dicot plants.

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“…According to Kaspary (2014), in adult age, shoot dry mass of a single plant of the said species may reach 388.5 g, while total dry mass may be up to 494 g. In crop areas, S. latifolia may reach infestation of 350 plants m -2 (Acuña, 2000), a biomass of 23 g plant -1 (Costa et al, 2002) and up to 0.77 t ha -1 of dry matter (Gonçalves, 2015). P. phaseoloides, at a density of 0.69 plants m -2 , can accumulate up to 3.2 t ha -1 of shoot dry matter, while P. conjugatum, can accumulate up to 1.89 t ha -1 of dry matter in interrows in coffee growing areas (Moreira et al, 2013). Tables 3 and 4 show the total amounts of nutrients present in the leaves of orange plants and weeds and their relative content.…”

Section: Resultsmentioning

confidence: 99%

Biomass Production and Mineral Nutrient Accumulation by Weeds and Sweet Orange Trees in the Amazonian

Gonçalves¹,

Carvalho²,

Garcia³

et al. 2019

JAS

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Accumulation of biomass and competition for nutrients can be used as parameters to identify species with higher potential for competition and, thus, with larger interference in crops. Consequently, studies addressing these parameters are important to weed science since they are the main factors that negatively affect the growth and productivity of cultivated plants. The objective of this research was to identify the species of weed plants with the largest potential of biomass production and accumulation of mineral nutrients in their leaves, which in turn, lead to higher interference in orange crops. In the floristic survey, 30 species of weed plants were identified and 14 botanic families, totaling 1341 sampled specimens. The phytosociological analysis showed, as per the importance value (IV), that the most representative weed species in the study area were as follows: Conyza bonariensis (L. (Cronquist)), Spermacoce latifolia Albl., Paspalum conjugatum PJ Bergius, Pueraria phaseoloides (Roxb.) Benth., Mollugo verticillate L., Peperomia pelucida (L.) Kunth, Euphorbia heterophylla L., Paspalum multicaule Poir and Waltheria corchorifolia Pers. Among these, the species with the highest production of biomass and accumulation of mineral nutrients in their tissues were S. latifolia, P. phaseoloides, P. conjugatum and C. bonariensis. This result suggests that these species are of high competitive potential against orange crops due to their high capacity for biomass and micronutrients accumulation.

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Fitossociologia de plantas daninhas do cafezal consorciado com leguminosas

Cited by 8 publications

References 11 publications

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

Phytosociological Survey of Weeds in Coffee Plants Irrigated Under Different Systems

Biomass Production and Mineral Nutrient Accumulation by Weeds and Sweet Orange Trees in the Amazonian

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