【摘要】 土壤锌对油菜的有效性为:EXC—Zn>OM—Zn>R₂O₃—Zn。EXC—Zn含量因油菜吸收而降低,但种植油菜促进土壤中CA—Zn和RES—Zn向RO—Zn转化。OM—Zn随土壤有机质含量而变化,有机质<1.5%时降低,>1.5%时增加,除中性沙土外,土壤有效锌均增加。施10ppm水溶态锌后,锌的分布顺序,酸性上为:R₂O₃—Zn>OM—Zn≈RES—Zn>EXC—Zn;钙质土及中性土为:CA—Zn>RES—Zn>OM—Zn>R₂O₃—Zn>EXC—Zn。更多还原

【Abstract】 To rape the availability order of different forms of soil—Zn is EXC—Zn>OM—Zn>R₂O₃—Zn. The content of soil EXC—Zn reduced because of the absorption of rape, but rape cultivation can promote the soil CA—Zn and RES—Zn transforming into R₂O₃—Zn。The contribution order of fertilizer—Zn is R₂O₃—Zn>OM—Zn≈RES—Zn>EXC—Zn in acidic soils, or CA—Zn>RES—Zn>OM—Zn>R₂O₃—Zn>EXC—Zn in calcium and neutrial soils under the cultivation of rape.更多还原