探讨了含有硝化抑制剂DMPP(3,4 二甲基吡唑磷酸盐)的长效肥料ENTEC对剌苋(Amaranthus spinosus L.)干物质积累及其氮素利用的影响。结果表明:与尿素处理相比,ENTEC对提高剌苋干物质积累作用不明显,其最大生长速率出现时间较晚;施用ENTEC,土壤含氮量较高,且下降速度较慢,说明其具有较强的防止氮素流失的作用。同时,ENTEC有利于提高氮素的利用率,ENTEC处理的植株氮素利用率比尿素处理提高了41.56%。另外,ENTEC能促进剌苋对磷、钾素的吸收。

Effects of a long-acting fertilizer ENTEC that contains 3,4-dimethylpyrazole phosphate(DMPP, a new nitrification inhibitor)on the growth and nitrogen utilization of Amaranthus spinosus L. were studied. The results show that ENTEC plays lesser role on the dry-matter accumulation than urea. The time of maximum growth rate of A. spinosus treated with ENTEC appears later than urea and CK. The N content of soil treated with ENTEC is high, and its decreased rate is slow. ENTEC can enhance the N recovery, the nitrogen utilization of A. spinosus fertilized with ENTEC is higher41.56% than urea. Otherwise, ENTEC can promote the absorption to P and K of A. spinosus.