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三熟制早稻占上海郊区粮食作物总面积的28%,粮食总产的35%,平均单产在750—800斤之间,是用肥较多而又增产潜力较大的一季粮食作物。在上海郊区条件下,三熟制早稻通常集中于5月24日至6月8日的半个月期间移栽,于7月25日至8月6日之间收获,平均大田生长期约60天。其最显著的特点,是营养生长(分蘖)和生殖生长(穗分
Three-crop early rice accounts for 28% of the total area of food crops in the suburbs of Shanghai, with 35% of the total grain output, with an average yield of 750-800 kg per hectare. It is a seasonally-staple food crop with more fertilizer and greater yield potential. Under the suburban conditions in Shanghai, three-cropped early rice is usually transplanted for half a month from May 24 to June 8 and harvested between July 25 and August 6 with an average of about 60 day. Its most notable features are vegetative growth (tillering) and reproductive growth (spike points