近几年来,在江苏里下河稻区水稻秧田期常常发生白苗,轻则1—2％,严重的可达20％以上,成为水稻生产的一个新课题。对此,有的认为是生理性白化苗;有的则认为是由病毒引起的白苗病。经采取防范措施,均未见效。通过3年的试验观察,初步探明这是由于施肥不当引起的一种生理性白苗。 In recent years, white rice seedlings often occur in the rice seedling stage of Lixiahe Rice Area in Jiangsu Province, ranging from about 1-2% and seriously up to 20% or more, becoming a new topic in rice production. In this regard, some think it is a physiological albino seedling; while others are thought to be caused by the virus white seedling disease. After taking preventive measures, no effect. Through 3 years of experimental observation, initially proved that this is due to improper fertilization caused by a physiological white seedlings.