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据气象资料,沈阳地区4月下旬日平均气温11℃,比历年低1～1.8℃,降水多1倍,日照少20～25小时。不少水稻秧苗生长不壮,根系发育不良,青、立枯病较重。5月中旬日照比历年少35～40小时,5月下旬日平均气温比常年低近2℃,使稻苗滞长,插秧后大缓苗,扎根慢。6月中旬日平均气温比历年低1℃,日照少25～35小时。5月1日～6月30日≥20℃积温为441～618℃,较常年少100～150℃。所以,水稻分蘖缓慢,发棵数量少,秧苗高度较正常年矮10厘米左右,每穴分蘖数少5～7棵,秧苗叶龄少1片叶,生育期较正常年晚7天以上。对此,应采取各种提高水温、地温,促进生长发育,提早成熟的措施。
According to meteorological data, the average daily temperature in Shenyang in the end of April is 11 ℃, which is 1 ~ 1.8 ℃ lower than that of previous years. Rainfall is more than double that of sunshine and 20-25 hours less. Many rice seedlings are not strong growth, poor growth of roots, green, damping-off heavier. In mid-May the sunshine is 35-40 hours less than the calendar year. The average daily temperature in late May is about 2 ℃ lower than that of the normal year. The average daily temperature in mid-June is 1 ℃ lower than in previous years and 25-35 hours less in sunshine. May 1 ~ June 30 ≥20 ℃ accumulated temperature of 441 ~ 618 ℃, 100 -150 ℃ less than usual. Therefore, the rice tillers slow, the number of hair trees less, the height of the seedlings shorter than normal about 10 cm, the number of tillers per hole less 5 to 7, leaf seedling less 1 leaf, the growth period of more than 7 days later than normal. In this regard, should take various measures to raise water temperature, ground temperature, promote growth and development, early maturity.