近年来,适于稻田追肥的尿素短缺,一部分制种户企图用碳酸氢铵追肥,代替尿素,但因方法不当,反会减产。其原因,白天(晴天更甚)撒施碳酸氢铵会引起:①叶片灼伤。肥料接触叶片,一昼夜叶片会出现芝麻、黄豆大小不等的白色斑点。②叶片熏伤。碳酸氢铵分解放出氨气进入气孔熏伤叶片,施肥三天始,叶片变黄转枯。叶片受伤,光合 In recent years, the shortage of urea suitable for paddy top dressing, as part of the system of seed production attempts to use ammonium bicarbonate fertilizer, instead of urea, but due to improper methods, anti-will cut. The reason, during the day (sunny even worse) spreading ammonium bicarbonate can cause: ① leaves burns. Fertilizer contact with leaves, a day and night leaves will appear sesame seeds, white beans of varying sizes. ② leaves smoked. Ammonium bicarbonate decomposition release ammonia into the pores fumigation leaves, fertilization three days, the leaves turn yellow to dry. Leaf injury, photosynthesis