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今年入夏以来,我国大部出现异常天气,总体上呈现“南旱北涝”。南方出现酷热、大旱,南方两湖及长江中下游地区遭遇干旱,降水偏少。而东北的黑龙江等北方地区出现洪涝灾害,降雨多。从南旱看,主要集中在长江中下游水稻主产区,给水稻生产带来不利影响,局部地区由于高温热害,导致水稻花粉败育,结实率下降。同时,高温干旱也影响旱地玉米灌浆成熟,一些地区双季晚稻因缺水栽插困难,只能改种。从北涝看,东北部分地区降水量比常年同期偏多3~5成,造成低洼地块农作物受淹。
Since the beginning of summer this year, most of our country has abnormal weather, presenting “southern drought and northern flood” in general. In the south there were hot and severe droughts, drought in the two lakes in the south and areas in the middle and lower reaches of the Yangtze River, with less rainfall. The northeast of Heilongjiang and other northern areas have flooding, rainfall. From the southern drought, mainly in the middle and lower reaches of the Yangtze River rice producing areas, to produce adverse effects on rice production in some areas due to high-temperature heat damage, resulting in rice pollen abortion, seed setting rate decreased. At the same time, high temperature and drought also affect the maturity of maize grouting. In some areas, double cropping late rice is difficult to grow because of lack of water and can only be replanted. From the perspective of the North Waterlogging, precipitation in parts of Northeast China is 3 to 5% higher than that of the same period of previous years, causing flooding of crops in low-lying land plots.