Weeds occurrence and importance under distinct intercropping systems

Planta Daninha

G Concenço²  G Ceccon¹  F Schwerz¹  I.c Fonseca¹  L.f Leite¹ 

[1] ,Embrapa Western Region AgricultureDourados MS ,Brazil

关键词: soil coverage;    soil management;    phytosociology;    cobertura do solo;    manejo do solo;    fitossociologia;   

DOI  :  10.1590/S0100-83582011000400011

来源: SciELO

【 摘 要 】

Intercropping systems involving corn are often subjected to stress caused by weeds, which usually result in 30-70 per cent yield loss when no control practice is applied. This study aimed to assess the composition of weed communities due to soil coverage, at neighboring areas submitted to distinct soil managements. The soil was collected at field and the study was conducted under a greenhouse in three steps: (1) weeds composition and importance within each treatment; (2) comparison between treatments (distinct crop and intercropping managements); (3) infestation in the area as a whole. The weed composition in the short term is influenced by the management of the area, but this shift requires some more years to be reflected at the soil seed bank. Some weed species occur in high densities and even this way they may not be the most serious weed species present in a given field. Just a few species are adapted to a given system of management in a level enough to be a troublesome weed. Areas differed in relation to weed infestation as a function of management adopted and number of years the new management was applied.

【 授权许可】

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