Weed communities of winter wheat as influenced by input level and rotation

Bàrberi, Paolo; Silvestri, Nicola; Bonari, E.

doi:10.1046/j.1365-3180.1997.d01-53.x

Cited by 79 publications

(70 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Intensification of agricultural production, related to the simplifications in the crop structure, and the large use of mineral fertilization and other means of production, mainly herbicides, can reduce weed diversity (Dyer 1995;Barberi et al 1997;Doucet et al 1999). The research results showed a similar number of species accompanying spring wheat in both the integrated and conventional systems.…”

Section: Discussionmentioning

confidence: 99%

The effectiveness of weed regulation methods in spring wheat cultivated in integrated, conventional and organic crop production systems

Feledyn-Szewczyk¹

2012

Journal of Plant Protection Research

View full text Add to dashboard Cite

Abstract:The research was conducted from 2008 to 2010, and compared the influence of different weed control methods used in spring wheat on the structure of the weed communities and the crop yield. The study was carried out at the Experimental Station of the Institute of Soil Science and Plant Cultivation -State Research Institute in Osiny as part of a long-term trial where these crop production systems had been compared since 1994. In the conventional and integrated systems, spring wheat was grown in a pure stand, whereas in the organic system, the wheat was grown with undersown clover and grasses. In the conventional system, herbicides were applied two times in a growing season, but in the integrated system -only once. The effectiveness of weed management was lower in the organic system than in other systems, but the dry matter of weeds did not exceed 60 g/m 2 . In the integrated system, the average dry matter of weeds in spring wheat was 4 times lower, and in the conventional system 10 times lower than in the organic system. Weed diversity was the largest in spring wheat cultivated in the organic system. In the conventional and integrated systems, compensation of some weed species was observed (Viola arvensis, Fallopia convolvulus, Equisetum arvense). The comparison of weed communities using Sorenson's indices revealed more of a similarity between systems in terms of number of weed species than in the number of individuals. Such results imply that qualitative changes are slower than quantitative ones. The yield of grain was the biggest in the integrated system (5.5 t/ha of average). It was 35% higher than in the organic system, and 20% higher than in conventional ones.

show abstract

Section: Discussionmentioning

confidence: 99%

The effectiveness of weed regulation methods in spring wheat cultivated in integrated, conventional and organic crop production systems

Feledyn-Szewczyk¹

2012

Journal of Plant Protection Research

View full text Add to dashboard Cite

show abstract

“…The importance of weed control was not surprising since application of herbicides was shown to be an important factor previously (Hald 1999, Hyvönen and Salonen 2002, Hyvönen et al 2003. In contrast, the effect of crop rotation has often been shown to be weak (Bàrberi et al 1997, Andersson and Milberg 1998, Doucet et al 1999, unless grasslands are included in the rotation (Paatela andErviö 1971, Sjursen 2001). Evidently, organically cropped fields had more diverse crop rotation histories than conventionally cropped fields.…”

Section: Discussionmentioning

confidence: 99%

Weed flora and weed management of field peas in Finland

Salonen¹,

Hyvönen²,

Jalli³

2008

AFSci

View full text Add to dashboard Cite

The composition of the weed flora of dry pea (Pisum sativum L.) fields and cropping practices were investigated in southwestern Finland. Surveys were done in 2002-2003 in 119 conventionally cropped fields and 64 fields under organic cropping. Herbicides were applied to 92% of conventionally cropped fields where they provided relatively good control but were costly. Weeds were controlled mechanically only in five fields under organic production. A total of 76 weed species were recorded, of which 29 exceeded the 10% frequency level of occurrence. The average number of weed species per field was 10 under conventional cropping and 18 under organic cropping. The most frequent weed species in both cropping practices were Chenopodium album, Stellaria media and Viola arvensis. Elymus repens was the most frequent grass species. The difference in species composition under conventional and organic cropping was detected with Redundancy Analysis. Under conventional cropping, features of crop stand and weed control explained 38.7% and 37.6% of the variation respectively. Under organic cropping the age of crop stand and field location (y co-ordinate) respectively explained best the variation. Weeds could be efficiently managed with herbicides under conventional cropping, but they represented a significant problem for organic production. Mixed cultivation of pea with cereals is recommended, particularly for organic cropping, as it favours crop competition against weeds.

show abstract

“…Nowadays, southern and south-western Finland are characterized by a high dominance of cereal crops in rotation whereas in central and eastern Finland the use of arable land is more diverse, many farms practising crop rotation based on grassland for silage and hay and pasture for cattle. Since this diversity of crop rotation has been found to have some effect on the species composition (Bàrberi et al 1997) and species diversity (Doucet et al 1999) of weed communities, we expected to find differences between regions.…”

Section: Salonen J Et Al Weeds In Spring Cereals In Finlandmentioning

confidence: 92%

Weeds in spring cereal fields in Finland - a third survey

Salonen¹,

Hyvönen²,

Jalli³

2001

AFSci

View full text Add to dashboard Cite

A survey of weeds in spring cereal fields was conducted in 16 regions of southern and central Finland in [1997][1998][1999]. Data were collected from conventional and organic farms, both of which applied their normal cropping practices. A total of 690 fields were investigated by counting and weighing the weed species from ten sample quadrats 0.1 m 2 in size in late July -early August. Altogether 160 weed species were found, of which 134 were broad-leaved and 26 grass species. The total number of weed species ranged from 41 to 84 between regions. In organically farmed fields, the average species number was 24 and in conventionally farmed fields 16. The most frequent weed species were Viola arvensis 84%, Stellaria media 76% and Galeopsis spp. 70%. Only 18 species exceeded the frequency level of 33%. The average density of weeds was 136 m -2 (median= 91) in sprayed conventional fields, 420 m -2 (374) in unsprayed conventional fields and 469 m -2 (395) in organic fields. The average airdry above-ground biomass of weeds was 163 kg ha -1 (median=63), 605 kg ha -1 (413) and 678 kg ha -1 (567), respectively. Weed biomass accounted for 3% of the total biomass of the crop stand in sprayed conventional fields and for 17% in organic fields. Elymus repens, the most frequent grass species, produced the highest proportion of weed biomass.

show abstract

Weed communities of winter wheat as influenced by input level and rotation

Cited by 79 publications

References 13 publications

The effectiveness of weed regulation methods in spring wheat cultivated in integrated, conventional and organic crop production systems

The effectiveness of weed regulation methods in spring wheat cultivated in integrated, conventional and organic crop production systems

Weed flora and weed management of field peas in Finland

Weeds in spring cereal fields in Finland - a third survey

Contact Info

Product

Resources

About