---

作 者 ：郑圣先1;刘德林2;聂军1;戴平安1;肖剑1

期 刊 ：植物营养与肥料学报 2004年 10卷 2期 页码：137-142

关键词：控释氮肥；氮素去向；氮肥利用率；稻田土壤；

Keywords:controlled release nitrogen fertilizer, nitrogen losses, nitrogen recovery efficiency, rice,

摘 要 ：通过土壤渗漏装置、微区和田间小区试验,研究了¹⁵N标记控释氮肥在淹水稻田土壤上氮素的去向和利用率。结果表明,施用控释氮肥能明显地降低氨挥发、淋失和硝化—反硝化的损失。控释氮肥处理的氨挥发量比尿素降低54.0%,氮淋失量降低32.5%。尿素的硝化—反硝化损失量占施入氮量的34.5%,而控释氮肥的只占2.0%;控释肥料与尿素氮在0—80cm土层中的残留率相近。控释氮肥一次性全量作基肥施入土壤,水稻的氮肥利用率平均为65.6%,比尿素(基肥+追肥)高出32.2个百分点。控释氮肥的农学效率显著地高于尿素。

Abstract:Fate and recovery efficiency of (¹⁵N) labelled controlled release nitrogen fertilizer (CRNF) in flooded paddy soil were studied using lysimeter apparatus, microplot and field experiment. The results showed that application of CRNF, the losses of the ammonia volatilization, nitrogen leaching and nitrification-denitrification were greatly reduce. The quantity of ammonia volatilization and nitrogen leaching losses were reduced by 54.0% and 32.5% in CRNF treatment than in urea. Losses of nitrification-denitrification made up 34.5% of N applied in urea treatment, and only 2.0% of N applied in CRNF treatment. Percent of fertilizer N remained in the 0-80 cm soil layer was similar in both CRNF and urea treatments. The N recovery efficiency of one time application of CRNF averaged 65.6%, which was higher than 32.2 percent point than that of applying urea (basal and top dressing) and the CRNF gave better agronomic efficiency of N than urea.

---