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近年来,上海郊区单季晚稻种植面积逐年有所增加,尤其今年增加较多。但一些生产单位在栽培单季晚稻时,往往套用三熟制水稻的生产技术,以致影响产量。因此,认真分析单季晚稻的生长特点,明确其高产主攻方向及其栽培途径,对于三熟改二熟后大面积单晚的高产稳产具有一定的参考价值。一、主攻方向单季晚稻要达到900斤左右的产量水平,每亩有效穗约20万,每穗总粒数近100粒,每穗实粒数为85粒左右,千粒重约27克。与三熟制水稻中同是粳稻的后季稻相比,每亩穗数减少8～10万,每穗实粒增加30～35粒,但千粒重相近。由此而论,单季晚稻的产量构
In recent years, the planting area of single-season late rice in suburban Shanghai has been increasing year by year, especially in this year. However, when producing some single-cropped late rice, some production units often apply the production technology of three-cropped rice so as to affect the output. Therefore, careful analysis of the growth characteristics of single-cropped late rice, clarify the main direction of its high-yielding and its cultivation methods for the second generation after three cooked double-cropping a single high-yield stable for some reference value. First, the main direction of single season late rice to reach about 900 kg output level, effective panicle about 20000 acres, the total number of grains per spike nearly 100, the number of grains per spike is about 85, 1000 grain weight of about 27 grams. Compared with the third crop of japonica rice, the number of spikes per acre was reduced by 80-100,000, while the number of spikelets per panicle was increased by 30-35, but the grain weight was similar. In view of this, single-season late rice production structure