水保所知识产出(1956---)知识库

The goal of the present work was to evaluate the additive effects of biochar and
chicken manure on maize growth in Pb-contaminated soils. In this study, we
conducted a pot experiment to investigate how biochar in soil (20, 40 g·kg −1 ), chicken
manure in soil (20, 40 g·kg −1 ), or a combination of biochar and chicken manure
in soil (each at 20 g·kg −1 ) effect maize growth, Pb uptake, leaves’ antioxidant
enzymatic activities, and soil enzyme activities under artificial conditions to simulate
moderate soil pollution (800 Pb mg·kg −1 ). The results showed that all biochar and/or
chicken manure treatments significantly (P < 0.05) increased maize plant height,
biomass, and superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT)
activity but decreased the malondialdehyde (MDA) content. These results indicated
that amending the soil with biochar and/or chicken manure could alleviate Pb’s
phytotoxicity. The biochar and/or chicken manure treatments remarkably decreased
the Pb concentration in maize roots, stems, leaves, bioconcentration factor (BCF),
translocation factor (TF), and available Pb concentration in the soil. Amending the
soil with chicken manure alone was more effective at increasing maize growth and
antioxidant enzymatic activity; the biochar treatment alone was more effective at
inducing soil alkalinization and contributing to Pb immobilization. The combined
use of biochar and chicken manure had an additive effect and produced the largest
increases in maize growth, leaves’ antioxidant enzymatic activity, and soil enzyme
activity. Their combineduse also led to the mostsignificant decreases in maize tissues
Pb and soil available Pb. These results suggest that a combination of biochar and
chicken manure was more effective at reducing soil Pb bioavailability and uptake by
maize tissues, and increasing maize growth. This combination increased plant height
by 43.23% and dry weight by 69.63% compared to the control.