利用沸石载体减少氮肥在土壤中损耗的研究

利用沸石较强的阳离子交换性和吸附性特点，将其用作氮肥硝酸铵载体，采取土壤表施和深施，定期测定土壤氮素含量，研究其动态变化。结果表明，采用载体处理在土壤中对氮素的保存率随时间的延长而提高，３０ｄ试验期全氮含量比同期对照提高５％￣８７．５％，水解氮含量比同期对照提高０．８５％￣４２．６％。据此认为，采用沸石载体处理氮肥，对提高其肥效和延长土壤供肥期及减少氮肥在施入土壤后的损耗具有明显作用。

THE STUDY ON EMPLOYING ZEOLITE AS CARRIER TO REDUCE CONSUMPTION OF NITROGEN FERTILIZER IN THE SOIL

Zeolite, because of its extremely strong positive ionic exchange ability and adsorption, was used as carrier of nitrogen fertilizer, NH 4NO 3. After surface and ten-centimetre-depth dressing experiments, the result of regular test on total N and hydrolitic N showed that: comparing to the control, the efficiency of N preservation rose by 5% to 87.5% in total N and 0.85% to 42.64% in hydrolitic N. It was thus clear that zeolite had certain effect to reduce consumption of introgen fertilizer in the soil.