1997年夏季，营口地区出现了近百年来罕见的高温少雨天气。其特点是温度高，旱段长，秋季持续干旱，9月中旬以后气温迅速下降，因此，给水稻正常生育和后期粮食生产带来了极为不利的影响。1对水稻生育的影响1．1　气象要素变化反常1997年水稻生育中、前期即5～7月降水明显偏少 In the summer of 1997, there appeared rare high temperature and rainy weather in Yingkou area in nearly a hundred years. Its characteristics are high temperature, long dry season, autumn continuous drought, the temperature dropped rapidly after mid-September, therefore, to the normal fertility of rice and the late grain production has brought a very adverse impact. 1 Effects on Rice Growth 1.1 Changes in Meteorological Factors Anomalous In 1997, in the fertility of rice, the precipitation in the early May to July was obviously less than that in the previous years