碳铵和尿素是中国的主要氮肥品种。研究表明,施入稻田后其氮素损失可达30—7.0%。为了减少氮肥的氮素损失,已经对许多施肥技术进行了研究,其中效果比较明显的是粒肥深施,但是,这项技术在推广应用中还存在着一些困难,主要是比较费工。氮肥在稻田中作基 Ammonium bicarbonate and urea are China’s major nitrogen fertilizer varieties. Studies have shown that nitrogen applied to paddy fields can reach 30-7.0%. In order to reduce nitrogen loss of nitrogen fertilizer, many fertilization techniques have been studied, of which the effect is obvious is the deep application of granulation fertilizer, but there are still some difficulties in popularization and application of this technology, which is mainly laborious. Nitrogen fertilizer in the paddy as a base