Regeneration capacity of Egeria densa in reservoirs in Paulo Afonso, Bahia

Planta Daninha

UFPE¹  UFPE, Recife¹  Pereira, S.M.B.¹  Oliveira, N.M.B.¹  Sampaio, E.V.S.B.¹  Moura Junior, A.M.¹  UFRPE¹ 

关键词: biomass;    plant harvesting;    water depth;    seasonal growth.;   

DOI  :  10.1590/S0100-83582005000200026

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 】

The regeneration capacity of Egeria densa must be studied to control its proliferation and reduce the damage to energy generation at Paulo Afonso power plant. Thus, 4 m2 plots were established in different seasons and at three water depths (0-2, 2-6, and 6-9 m) with removal of the initial plant biomass and three months later. At 0-2 m depth, removal was repeated five consecutive times in four of the plots. At this depth, regenerated biomass (518 g m2) was similar to the initial one (482 g m2), regardless of season (dry season, overall: 506 g m2; rainy season: 513 g m2) and repeated removal. At 2-6 m, regenerated biomass was only 66% of the initial ones (150 and 229 g m2) and at 6-9 m, only 21% (11.6 and 54.9 g m2). The rapid recolonization and growth of E. densa makes it very difficult to eradicate it from São Francisco River reservoirs. It is suggested that this great biomass production potential be put to use.

【 授权许可】

Unknown