EFFECTS OF Na2SeO3 APPLICATION ON SELENIUM STATUS IN DARK BROWN FOREST SOILS AND SELENIUM ACCUMULATION IN SEVERAL FOREST VEGETABLES
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    Abstract:

    To explore the resources of selenium enriching forest vegetables,an experiment was carried out of cultivating four species of wild forest vegetables,i e. Matteuccia struthiopteris Todaro,Aegopodium alpestre,Taraxacum mongolicum and Allium macrostemon in Dark Brown Forest Soil,using Na2SeO3 for fertilization,varying in application rate from Se 0.10 to 10.00mg kg-1,directly into the top 15 cm soil layer Soil and plant samples were collected and Secontents were determined one year (a full growth cycle) after the application Results show that Typic Dark Brown Forest Soil displayed a high capacity of adsorbing and reserving around 90%~70% of the applied Se,from low to high application rate,in the top 15 cm soil layer of the total soil Se,about 6.03%~3.78% was water soluble Se and 19.36%~37.54% KH2PO4 extractable Se,they were all linearly re lated to the initial. Se application rate All the four species of wild vegetables tested were found capable of accumulating Se ex traordinarily from soils with strengthened soil selenium supply And the Se contents in these plants were 1.7~158.9 times as high as that in the plants in control (CK),varying with the application rate. The four species of plants were very different from each other in Se accumulation capacity and in variation pattern of Se accumulation with increasing Se application rate. On the whole,plant Se content was non linearly related to Se application rate,but when the application rate was low,a linear relation ship was found and varying in range from species to species It was also found that plant Se content was also significantly,posi tively but nonlinearly related to the contents of soil total Se,KH2PO4 extractable Se and water soluble Se,and linearly related when the application rate was low It is hence concluded that properly controlled soil Na2SeO3 application in Typic Dark Brown Forest Soil would be an effective way to cult ivate Se rich forest vegetables and to exploit Se rich vegetable resources under the quasi natural conditions of the forest region,except heavily perturbed coarse textured soil.

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Cui Xiaoyang, Cao Kai, Hao Jingmei. EFFECTS OF Na2SeO3 APPLICATION ON SELENIUM STATUS IN DARK BROWN FOREST SOILS AND SELENIUM ACCUMULATION IN SEVERAL FOREST VEGETABLES[J]. Acta Pedologica Sinica,2007,44(6):1111-1118.

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History
  • Received:August 24,2006
  • Revised:November 09,2006
  • Adopted:
  • Online: February 25,2013
  • Published: