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土壤圈(英文版). 1997, (02)

Genotypic Difference of Plants in K-Enrichment Capability and the Distribution of K in Plant RhizosphereEnglish Full Text

YAN WEIDONG;SHI WEIMING;LIAO HAIQIU and CAO ZHIHONGInstitute of Soil Science, Academia Sinica, Naniing 210008 (China)

Abstract: Plant genotypic difference of pot assiu m-enr ich ment capab ility and p ot assi um （K ） d ist rib ut ion at root-soil ioterface of different plant genotypes were studied by using seven plant species and eight varieties oftobacco （Nicotiana tabacum L.）. The results indicated that K enrichment capability was: Ethiopian guizotia（Guizotia abyssinica Cass.）＞feather cockscomb （Celosia arpentea L.）＞alligator alternanthera （Alternantheraphiloxeroides （Mart.） Griseb.）＞ tobacco＞sesbania （Sesbania cannabina （Retz.） Pers.）＞wheat （Thticumaestivum L.）＞broadbean （Vicia faba L.）. Ethiopian guizotia showed very high K-enrichment capability atdifferent soil K levels, and the K content in its dry matter was over 110 mg kg-1 when soil K was fullysupplied, and about 60 mg kg-1 when no K fertilizer was applied. For alligator alternanthera, the capabilityto accumulate K was closely related with its growth medium. When it was grown on soils, both the K contentand K uptake rate of the plant were similar to those of tobacco. Evident K dep1etion was observed in therhizosphere of all plant species, and the depletion rate was related to the capability of K enrichment of plant.
Keywords：

K-enriched plants; K enrichment; rhizosphere; tobacco （Nicotiana tabacum L.）;

  • Series：

    (D) Agriculture

  • Subject：

    Fundamental Science of Agriculture; Agronomy

  • Classification Code：

    S154

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