腐植酸肥料对生姜土壤脲酶活性及氮素吸收的影响

采用池栽方式，研究了腐植酸肥料对生姜土壤脲酶活性和碱解氮含量、植株氮素吸收量以及根茎产量的影响。结果表明：与不施肥处理相比，施用等量腐植酸能够显著提高土壤碱解氮含量、植株氮素吸收量和根茎产量；土壤脲酶活性前期降低、后期提高。与施用等量无机养分处理相比，施用腐植酸缓释肥料能显著提高生长后期土壤脲酶活性、土壤碱解氮含量和植株氮素吸收量，根茎产量提高9.17 %。

Effects of Humic Acid Fertilizer on Urease Activity in Ginger Growing Soil and Nitrogen Absorption of Ginger

In this study，effects of humic acid fertilizer on soil urease activity and available nitrogen content，nitrogen absorption of plant，and rhizome yield in ginger growing soil via pond culture．The results showed that in comparison with no fertilizers，the application of equal quantity humic acid could significantly increase soil available nitrogen content，plant nitrogen absorption and rhizome yield，and soil urease activity decreased during the early growing stage，but it increased in the later stage.In comparison with equal quantity treatment of non-organic fertilizers，the application of slow releasing humic acid fertilizer could significantly increase soil urease activity，soil available nitrogen content and plant nitrogen absorption during the later ginger growing stage，and increase rhizome yield by 9.17 %．