碳酸氢铁简称碳铵，由于其肥效快，常被用作水稻秧苗追肥或基肥。特别是中、早稻育秧期间气温低，施用尿素肥效缓慢，往往秧苗前期易造成缺肥。但是，碳该在作追肥时，施用技术不当，易造成秧苗中毒和烧苗。对此，提出以下技术措施。1．作基肥在秧苗播种前7～10天结合整田，每6 Ferric bicarbonate, abbreviated as ammonium bicarbonate, is often used as top-dressing or basal fertilizer for rice seedlings due to its rapid fertilizer effect. In particular, medium and low temperature during early rice seedling growth, urea application slow, often easy to cause lack of fertilizer early seedling. However, carbon should be used for top dressing, the application of improper technology, easy to cause seedlings poisoning and burning seedlings. In this regard, proposed the following technical measures. 1. For basal 7 ~ 10 days before sowing seedlings with the entire field, every 6