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土壤锌对油菜的有效性为:EXC—Zn>OM—Zn>R_2O_3—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:R_2O_3—Zn>OM—Zn≈RES—Zn>EXC—Zn;钙质土及中性土为:CA—Zn>RES—Zn>OM—Zn>R_2O_3—Zn>EXC—Zn。
The effectiveness of soil zinc on rape is EXC-Zn> OM-Zn> R_2O_3-Zn. The EXC-Zn content decreased due to rapeseed uptake, but the rapeseed cultivation promoted the conversion of CA-Zn and RES-Zn to RO-Zn in the soil. OM-Zn varied with soil organic matter content, organic matter <1.5% decreased,> 1.5% increased, except for neutral sand, soil available zinc increased. After 10 ppm water-soluble zinc was applied, the distribution of zinc was order of acidity: R_2O_3-Zn> OM-Zn≈RES-Zn> EXC-Zn; calcareous soil and neutral soil were: CA-Zn> RES-Zn> OM -Zn> R_2O_3-Zn> EXC-Zn.