Effects of Applying Accumulator Straw in Soil on Growth and Cadmium Accumulation of Galinsoga parviflora

doi:10.7668/hbnxb.2015.04.036

Abstract

Abstract: To study the allelopathy effects of accumulator straw on hyperaccumulator,a pot experiment was conducted to study the effects of applying accumulators (Conyza canadensis, Cardamine hirsuta, Eclipta prostrata and Nasturtium officinale) straws in soil on growth and cadmium accumulation of Galinsoga parviflora under cadmium pollution.The results were as follows:Compared with non-application (control),the application of C.canadensis and C.hirsute straws improved the roots,stems,leaves,shoots and whole plants biomasses of G.parviflora,and the plant height and antioxidant enzymes (SOD,POD and CAT) activity of G.parviflora also increased.The straws of E.prostrate and N.officinale reduced the biomass,plant height and antioxidant enzyme activity of G.parviflora.The straws of C.canadensis, C.hirsuta, E.prostrata and N.officinale improved cadmium content in shoots of G.parviflora,which improved 12.01%,9.55%,22.03% and 5.39% respectively compared with control,but only C.canadensis and C.hirsuta straws improved the cadmium accumulation in shoots of G.parviflora (which improved by 35.78% and 11.77% respectively compared with control). C.canadensis and C.hirsuta straws increased soil catalase activity,soil urease activity and soil invertase activity,and the straws of E.prostrata and N.officinale reduced soil activity.Therefore,the applying C.canadensis and C.hirsuta straws in soil could improve cadmium contaminated soil remedy ability of G.parviflora,and C.canadensis straw was the best one.

Key words: Accumulator straw, Galinsoga parviflora, Cadmium, Phytoremediation

CLC Number:

X53
S154

TANG Fu-yi, LIN Li-jin, LIAO Jin-qiu, LIAO Ming-an, HE Jing, YANG Dai-yu, ZHANG Xiao. Effects of Applying Accumulator Straw in Soil on Growth and Cadmium Accumulation of Galinsoga parviflora[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(4): 213-218. doi: 10.7668/hbnxb.2015.04.036.

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