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双城市是全国十大产粮县(市)之一,每年需玉米种子400万公斤,其中内繁玉米种子达100万公斤。由于秋季经常出现低温早霜天气,使种子贪青晚熟,含水量大,成熟度低,发芽率下降,影响
Shuangcheng is one of the top ten grain producing counties (cities) in the country, with 4 million kilograms of maize seeds per year, of which 1 million kilograms of maize seeds are flourishing. Due to the frequent low-temperature early frost weather in autumn, the seed is greedy and late-maturing, the water content is large, the maturity is low, and the germination rate is decreased, which affects