A field experiment was conducted to investigate the growth of 29 varieties(lines)of Brassica napus L.cultivated in antimony-contaminated fields and the absorbing and transporting capacity of root,stem,leaf,pod,and seed to antimony.The results indicated that Changxiangyou 3 exhibited significantly higher dry weight per plant(126.84 g)compared to other tested oilseed rape,demonstrating its excellent growth advantage.Antimony contents in rape leaves,pods,roots,stems and seeds decreased successively with the highest concentration found in leaves as the primary site for antimony accumulation in rape plants.There were positive correlation(P<0.01)between antimony contents in stems,leaves,pods and seeds with that in roots.The positive correlation were also found between antimony contents in seeds with both root and stem concentrations(P<0.01).These findings suggested continuous accumulation of antimony within rape seeds through upward transportation from roots to stems.Nanyouza 1 had the highest biological enrichment coefficient for antimony at 1.11 while Miyou518 had the lowest at 0.06 among the tested varieties(lines),which indicated they belonged to high accumulation and low accumulation varieties respectively,and the antimony mass fraction of their grains were only 0.38 and 0.22 mg/kg,making them suitable choices for remediation of antimony-contaminated soil.The transport coefficients from stem to leaf(TFSL),stem to pod(TFSP),stem to seed(TFSS),root to stem(TFRS),pod to seed(TFPS),leaf to pod(TFLP),and leaf to seed(TFLS)showed a decreasing trend.Antimony content in rape seeds demonstrated positive correlation with TFRS(P<0.05),TFPS(P<0.01),TFLS(P<0.01)and TFSS(P<0.01),while showing negative correlation with TFSP(P<0.01).These results together indicated that the content of antimony in rape seed was primarily determined by the ability of antimony in pod and leaves to be transported to the seeds.
国家科技期刊平台
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