Glyphosate drift affects arbuscular mycorrhizal association in coffee

Planta Daninha

Universidade Federal de Viçosa, Viçosa, Brazil¹  Ferreira, E.A.¹  Franco, M.H.R.¹  França, A.C.¹  Souza, B.P.¹  Ferreira, F.A.¹  Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil¹  Carvalho, F.P.¹  Kasuya, M.C.M.¹ 

关键词: Coffea arabica;    glyphosate drift;    mycorrhiza;    Rhizophagus clarus;    Gigaspora margarita.;   

DOI  :  10.1590/S0100-83582014000400013

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

Mycorrhizal association promotes better survival and nutrition of colonized seedling on field, and consequently, increasing of productivity. However, the weed management can interfere on this association, due to incorrect use of glyphosate. This work has assessed the effects of glyphosate drift on the growth and nutrition of arabica coffee plants (Catuaí Vermelho - IAC 99) colonized with arbuscular mycorrhizal fungi (AMF). The experiment was conducted in 2 x 5 factorial scheme, and included inoculated and non-inoculated plants, and five glyphosate subdoses (0.0, 57.6, 115.2, 230.4, and 460.8 g ha-1 of glyphosate), in randomized blocks with five replication. The inoculation was carried during the greenhouse phase of seedlings production with a mixture of Rhizophagus clarus and Gigaspora margarita, and after to transplanting, when the plants had seven pairs of leaves, glyphosate subdoses were applied. The product caused intoxication in up to 60% of non-inoculated and 45% on inoculated plants, when the highest dose of 460.8 g a.e. ha-1 was applied. A negative effect was noted on the growth and phosphorus content of coffee plants, this effect increased depending on glyphosate subdose, but regardless of inoculation. Glyphosate drift reduces the growth and nutrition of plants colonized by species of AMF and native fungi, negatively affecting root colonization of plants treated.

【 授权许可】

Unknown