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单季晚稻的大田生长期较长,有二个吸肥高峰,即在移栽后的第三周左右出现第一个高峰,至6～7周时为第二个高峰。上海郊区,自六十年代推广三熟制以来,近20年对单季晚稻很少进行研究。特别是经过长期三熟制栽培后的土壤条件及采用新的品种后,对不同肥料的效应缺乏研究。自1985年来郊区种植单季晚稻的面积大幅度上升,广大农户和科技人员对单季晚稻的施肥技术和效益十分关切。我们于1983年起对单季晚稻
The single-season late rice had a longer growing season and two peak sucking peaks, that is, the first peak appeared around the third week after transplanting and the second peak reached between 6 and 7 weeks. In the suburbs of Shanghai, since the promotion of three-cropping system in the 1960s, seldom studied single-cropped late rice in the recent 20 years. Especially after long-term three-year cultivation of soil conditions and the introduction of new varieties, the effect of different fertilizers lack of research. Since 1985, the area for planting single-cropped late-season rice in the suburbs has risen sharply. The majority of farmers and scientific and technological personnel are very much concerned about the fertilization techniques and benefits of single-cropped late rice. We started single season late rice in 1983