期刊论文详细信息
Revista Brasileira de Ciência do Solo
Influence of fungicide seed treatment on soybean nodulation and grain yield
Jerri Édson Zilli2  Karen Gonçalves Ribeiro1  Rubens José Campo1  Mariangela Hungria1 
[1] ,Embrapa RoraimaBoa Vista RR
关键词: Glycine max;    carbendazim;    thiram;    carboxin;    BNF;    Cerrado;    Glycine max;    carbendazim;    tiram;    carboxin;    FBN;    Cerrado;   
DOI  :  10.1590/S0100-06832009000400016
来源: SciELO
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【 摘 要 】

Biological N2 fixation is a major factor contributing to the increased competitiveness of Brazilian soybeans on the international market. However, the contribution of this process may be limited by adverse conditions to symbiotic bacteria, such as fungicide seed treatments. This study aimed to evaluate the effects of the fungicides carbendazim + thiram and carboxin + thiram on soybean nodulation, plant growth and grain yield. Two field experiments were carried out in the Cerrado region of the State of Roraima, in a soil with a low organic matter content and no soybean bradyrhizobia. In 2005, seeds were treated with fungicide carbendazim + thiram and commercial inoculants containing the Bradyrhizobium elkanii strains SEMIA 5019 and SEMIA 587 and B. japonicum strains SEMIA 5079 and SEMIA 5080. In 2006, soybean seeds were treated with the fungicides carbendazim + thiram or carboxin + thiram and inoculated separately with each one of the four strains. The plants were evaluated for number of nodules and dry weight, shoot dry weight and total N accumulated in shoots 35 days after plant emergence, while grain yield and N grain content were determined at harvest. Both fungicides reduced soybean nodulation, especially in the presence of B. elkanii strains. The fungicide carbendazim + thiram reduced nodulation by about 50 % and grain yield by more than 20 % (about 700 kg ha-1), in the treatment inoculated with of strain SEMIA 587.

【 授权许可】

CC BY   
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