水稻生长反常是由于品种选用不当及栽培措施不合理造成的。从其田间表现来看,有早穗、早衰、倒伏、贪青等情况,发生的面积较广,减产的幅度较大。 (一)早穗 早穗现象主要是秧龄过长造成的,特别是早熟品种,播种晚而又秧龄过长,就容易发生早穗。防止早穗要根据品种特性,掌握恰当的播 The abnormal growth of rice is due to improper selection of cultivars and unreasonable cultivation measures. From its field performance, there are areas such as early spike, premature aging, lodging and greeting, which have a wider area and a larger reduction in output. (A) The phenomenon of early spike Early spike is mainly caused by the long seedling age, especially the early maturing varieties, sowing late and the young age is too long, prone to early spike. Prevent early ears according to the characteristics of varieties, to master the appropriate broadcast