Green Manure Species for Phytoremediation of Soil With Tebuthiuron and Vinasse

Frontiers in Bioengineering and Biotechnology

卷:8

Ederio Dino Bidoia¹  Jaqueline Matos Cruz¹  Renato Nallin Montagnolli²  Luziane Cristina Ferreira³  Bruno Rafael de Almeida Moreira³  Ronaldo da Silva Viana³  Yanca Araujo Frias³  Evandro Pereira Prado³  Rafael Simões Tomaz³  Paulo Renato Matos Lopes³ 

[1] Department of Biochemistry and Microbiology, Biosciences Institute, São Paulo State University (UNESP), Rio Claro, Brazil;

[2] Department of Natural Sciences, Mathematics and Education, Agricultural Sciences Center, Federal University of São Carlos (UFSCar), Araras, Brazil;

[3] Department of Plant Production, College of Technology and Agricultural Sciences, São Paulo State University (UNESP), Dracena, Brazil;

关键词: bioremediation;    ecotoxicity;    fertigation;    herbicide;    sugarcane;   

DOI  :  10.3389/fbioe.2020.613642

来源: DOAJ

【 摘 要 】

Tebuthiuron is often used to control weed growth in sugarcane cultures. This herbicide is highly toxic and can persist in soil for up to 2 years according to its degradation half-life. Hence, its residual effect is highly hazardous for the environment and local habitants via leaching, surface runoff. Screening out of species of green manure as potential phytoremediators for tebuthiuron in soil, with and with no vinasse, accordingly is the scientific point of this study. Green manure species selected for the trial in greenhouse were jack bean [Canavalia ensiformis (L.) DC.], pigeon pea [Cajanus cajan (L. Millsp.)], velvet bean [Mucuna pruriens (L.) DC.)], and millet [Pennisetum glaucum (L.) R.Br.], and Crotalaria juncea L. as bioindicator of this herbicide. The determination/quantification of height, stem diameter, and number of leaves in all plants were monitored, as well as other morphological traits for drafting any inference on biomass production. Moreover, ecotoxicity bioassays were performed from soil samples at the beginning and at the end of the experiment. Results showed preliminary evidence of effective phytoremediation capacity by M. pruriens and P. glaucum in soils with tebuthiuron, as the growth of C. juncea was sustained. Both Gompertz approach and principal component analysis predicted that these green manure species could grow healthier and for longer periods in soils containing tebuthiuron and vinasse and, thus, reduce physiological anomalies due to ecotoxicity. The implications of this study may aid in the implementation of cost-effective strategies targeting decontamination of tebuthiuron in sugarcane crops with vinasse application in fertigation.

【 授权许可】

Unknown