---

作 者 ：邓兰生;张承林

期 刊 ：植物营养与肥料学报 2007年 13卷 1期 页码：81-85

关键词：滴灌；滴灌施肥；氮肥；氮肥利用率；玉米；

Keywords:drip irrigation, fertigation, nitrogen fertilizers, nitrogen use efficiency, maize,

摘 要 ：本研究通过滴灌施氮肥与常规的基施氮肥进行比较试验,以了解两种不同的施肥方式下施用不同品种氮肥对氮肥利用率的影响。试验设10个处理,所选用的氮肥品种有:尿素、硝酸铵、硝酸钙、硫酸铵。试验结果表明,同基施氮肥+滴灌处理相比,滴灌施氮肥处理能显著提高氮肥的利用率,其增幅达8.75%～21.50%,有利于玉米对氮肥的吸收及生物量的积累;在同一灌溉施肥条件下施用不同品种的氮肥时,各处理间的氮肥利用率表现出一定的差异性,其中硝酸钙处理的氮肥利用率显著低于另外3种氮肥处理。

Abstract:Water and nutrient are the two key inputs in agriculture,but their use efficiency is low and their injudicious use leads to environmental degradation.Fertigation has some special advantages in irrigation-agriculture since it provides the most effective way of supplying nutrients to the plant roots.The main objective of the study was to evaluate the effects of two different N application methods(Drip N fertigation and traditional base application N)with different nitrogen fertilizers(urea,ammonium nitrate,calcium nitrate,and ammonium sulphate).The results obtained were as follows: compared with traditional way,drip N fertigation could significantly increase the nitrogen use efficiency 8.75%—21.50% for different fertilizer.Nitrogen use efficiency between different nitrogen fertilizers also showed a significant difference,among which calcium nitrate had the lowest N use efficiency

---