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以春小麦京红８号、冬小麦冀麦２４为材料，研究了腐植酸对小麦发芽率和幼苗生长的影响，用３２Ｐ中示踪法研究了不同浓度腐植酸与０．１％Ｎａ２Ｈ３２ＰＯ４在小麦４叶期，７叶期，始穗期和抽穗期深叶，３２Ｐ中的吸收率，转移率及分布的影响。不同浓度的腐植酸浸种，在２５℃条件下对发芽没有明显的促进作用。但在水分不足或补水情况下，０．０１ｇ·Ｌ－１腐植酸浸种的幼苗生长快，干、鲜重增加，为壮苗打下良好基础，０．０３ｇ／Ｌ有抑制作用。０．０１ｇ·Ｌ－１腐植酸加０．１％Ｎａ２Ｈ３２ＰＯ４在不同生育期涂抹叶片，对磷的吸收和转移有促进作用，０．０３ｇ·Ｌ－１加０．１％Ｎａ２Ｈ３２ＰＯ４表现抑制作用。从而０．０１ｇ·Ｌ－１腐植酸对小麦吸收磷及其转移有增效作用。
The effects of humic acid on the germination rate and seedling growth of wheat were studied by using spring wheat Jing-Hong 8 and winter wheat Ji-Mai 24. The effects of different concentrations of humic acid and 0.1% Na2H32PO4 on wheat 4-leaf Period, 7-leaf stage, initial heading stage and heading stage, 32P absorption rate, transfer rate and distribution. Different concentrations of humic acid soaking, germination at 25 ℃ did not significantly promote the role. However, in the condition of insufficient water or water supplement, seedlings soaked with 0.01 g · L-1 humic acid grew fast, increased in dry and fresh weight, which laid a good foundation for strong seedlings and inhibited 0.03 g / L. 0.01g · L-1 humic acid plus 0.1% Na2H32PO4 applied leaves at different growth stages, which promoted the uptake and transfer of phosphorus, and inhibited the growth with 0.03g · L-1 plus 0.1% Na2H32PO4. Thus 0.01g · L-1 humic acid has a synergistic effect on phosphorus uptake by wheat and its transfer.