Correlação da distribuição espacial do banco de sementes de plantas daninhas com a fertilidade dos solos

Shiratsuchi, L. S.; Fontes, J. R. A.; Resende, Á. V. de

doi:10.1590/s0100-83582005000300006

Cited by 14 publications

(17 citation statements)

References 7 publications

(3 reference statements)

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“…Higher weed coverage and density on P rich soils have also been reported by Iwara et al (2011). Although significant correlation between C. rotundus density and high P contents has been reported by Shiratsuchi et al (2005); there was higher affinity for K contents than P contents in the present study.…”

supporting

confidence: 68%

Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey

et al. 2018

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-Citrus is an important export commodity, mostly grown on Mediterranean and Aegean coasts of Turkey. Weeds are hidden foes impairing citrus productivity. Limited knowledge of weed distribution and factors affecting the distribution are among major hurdles in successful weed management. In this study, weed flora of citrus orchards and factors affecting its distributions in Mugla province of Turkey were determined. Sixty orchards were surveyed in spring and autumn seasons of 2010 and 2011. Data relating to frequency, coverage and density of weed species were recorded. Soil samples (0-30 cm depth) were collected and analyzed for physicochemical properties. Climatic variables, altitude and soil properties were correlated with weed flora. Sixty-eight weed species belonging to 30 families were documented. Higher number of weed species (54) was recorded in spring season compared with autumn (29 weed species). Annuals and therophytes were the most dominant growth and life forms, respectively. Canonical Correspondence Analysis (CCA) to correlate soil properties and weed vegetation data yielded three distinct groups dominated by phosphorus, sand and silt contents, which affected weed distribution. CCA to correlate vegetation data and weather attributes produced two distinct groups affected by altitude and precipitation. Generally, cosmopolitan weeds adapted to different ecosystems were observed during the survey. Keeping in view the spatial variability of soil and nature of weeds, site-specific/orchard-specific weed management practices are recommended to be opted for successful weed management.Keywords: weeds, multivariate analysis, soil properties, weather. Palavras-chave: plantas daninhas, análise multivariada, propriedades do solo, clima. RESUMO -Os citros

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supporting

confidence: 68%

Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey

et al. 2018

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“…However, in Brazil, little is known about the spatial variability of weeds. The first works were Shiratsuchi et al (2004Shiratsuchi et al ( , 2005, Schaffrath et al (2007) and Monquero et al (2008) whose studied the spatial distribution of weed in order to determine specific zones of management. Other studies emphasized the importance of studying the weeds distribution and specific management sites.…”

Section: Introductionmentioning

confidence: 99%

“…Bressan et al (2006) used geostatistics techniques to classify the risk of weed infestation, and made the decision on the best management for each field area. Shiratsuchi et al (2005) also reported that most studies that focused on weeds mapping had as a primary concern mapping the emerging flora during the critical cycle of interference, being the only few studies on spatial variability of weeds in the course of the crop cycle. Allied to this, studies focusing on weed parameters analysis of species diversities of the communities try to determine the degree of infestation, being one of the first steps in studying the weeds dynamics and the choice of strategies control (Lacerda et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Spatial variability of weeds in an Oxisol under no-tillage system

Siqueira¹,

Silva²,

Aguiar³

et al. 2016

Afr. J. Agric. Res.

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In the global agribusiness, the herbicide use is a major problem for sustainable production, in this sense, it is necessary to better understand the interaction of weed species and floristic composition such as biodiversity indicators. The objective of this study was to analyze the spatial variability of weeds in an Oxisol under no-tillage system. Samples were taken in an area of 0.5 ha, in 50 sampling points with spacing of 5 m x 10 m. Data were analyzed by means of classical statistics, geostatistics, and spatial variability of the constructed maps by the interpolation by kriging technique. All the species of weeds presented in the study area showed spatial variability with the exception of Ipomoea triloba (L.) and Heliotropium indicum (L.), which showed pure nugget effect. The range values (a) shows that the spacing between samples can be extended to all species of weeds. The study was unable to determine specifics areas of management in the local since the different species of weed infested different plots of the area.

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“…It should be noted that the three species showed spatial stability between years (September 07/May 2008). The results of patch persistence over time vary between species depending on their bioecological characteristics, but need to be combined with weed management practices in the field, such as herbicide application and direction of machine work at cultivation and harvesting or soil fertility (Shiratsuchi et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

Infestation maps and spatial stability of main weed species in maize culture

Calha

Sousa²,

González‐Andújar

2014

Planta daninha

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-A study on the spatial distribution of the major weeds in maize was carried out in 2007 and 2008 in a field located in Golegã (Ribatejo region, Portugal). The geo-referenced sampling focused on 150 points of a 10 x 10 m mesh covering an area of 1.5 ha, before herbicide application and before harvest. In the first year, 40 species (21 botanical families) were identified at seedling stage and only 22 during the last observation. The difference in species richness can be attributed to maize monoculture favouring reduction in species number. Three of the most representative species were selected for the spatial distribution analysis: Solanum nigrum, Chenopodium album and Echinochloa crus-galli. The three species showed an aggregated spatial pattern and spatial stability over both years, although the herbicide effect is evident in the distribution of some of them in the space. These results could be taken into account when planning site-specific treatments in maize. Keywords

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Correlação da distribuição espacial do banco de sementes de plantas daninhas com a fertilidade dos solos

Cited by 14 publications

References 7 publications

Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey

Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey

Spatial variability of weeds in an Oxisol under no-tillage system

Infestation maps and spatial stability of main weed species in maize culture

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