Assessment of the degradation of aquatic macrophytes discarded into a protected environment

Planta Daninha

Negrisoli, E.¹  Velini, E.D.¹  Corrêa, M.R.¹  UNESP, Botucatu¹  Cezar, V.R.S.¹  UNESP¹  Villas Boas, R.L.¹ 

关键词: macrophytes;    temperature;    discard volume and area.;   

DOI  :  10.1590/S0100-83582005000200012

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 】

An experiment was carried out at the Department of Natural Resources – Environmental Science, UNESP, Botucatu-SP to evaluate the degradation of aquatic macrophytes discarded in stacks, after mechanical control measures. Stacks of 2.25 m3 volume were set up, composed of three species of macrophytes collected from the Americana UHE reservoir in Sao Paulo. Stack samples were collected at 15, 30, 60 and 90 days, for temperature monitoring and organic material pH assessment during the process, besides compound chemical analysis at day 90. The treatments were: T1-only aquatic plants with stack revolving every seven days; T2- only aquatic plants revolving every four days; T3- aquatic plants + permagel and revolving every seven days and T4aquatic plants + permagel and revolving every four days. The experiment was arranged in a randomized design, with statistical analysis for collection at day 90, using the SISVAR program. Results from the study on macro and micronutrients, temperature, moisture, pH, C/N relation and stack volume reduction were similar to those observed with discard was in stacks of 4.5 m3 volume.

【 授权许可】

Unknown