Interference of Sorghum sudanense and Eleucine indica in the soybean and corn cultivation

Planta Daninha

M.a. Rizzardi¹  A.c.d. Wandscheer¹ 

[1] ,Universidade de Passo FundoPasso Fundo Rio Grande do Sul-RS ,Brazil

关键词: competition;    Sorghum sudanense;    Eleusine indica;    competitive hability;    competição;    Sorghum sudanense;    Eleusine indica;    habilidade competitiva;   

DOI  :  10.1590/S0100-83582014000100003

来源: SciELO

【 摘 要 】

The natural infestations are composed of numerous species that compete for environmental resources such as water, light, nutrients and space. The objective of this study was to evaluate the interference of mixed infestations Sorghum sudanense (sudangrass) and Eleusine indica (goosegrass) in the presence of soybean and corn. The experimental design was completely randomized with four replications and the experimental units consisted of plastic pots with a volume capacity of 8 L. The treatments were associations of plants S. sudanense and E. indica in the proportions 8:0, 6:2, 4:4,2:6 and 0:8, respectively, corresponding to 100, 75, 50, 25 and 0% S. sudanense and the reverse for E. indica. In all treatments remained constant four soybean or corn plants per experimental unit. The variables analyzed in the weeds were shoot dry weight, root, total and height of plants. The competitive analysis was accomplished through diagrams applied to replacement series experiment and indexes of competiveness. The results indicated that E. indica was more competitive than S. sudanense in mixed infestations with corn. Rather, S. sudanense was more competitive than E. indica, in mixed infestations with soybean, demonstrating differences in competitiveness among the weeds.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License