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从1984年起,福清县倒种具有高产、稳产、适应性广、抗逆性强、生育期短的杂优品种威优64,1986年推广面积达30471亩,占全县晚稻面积的15.2％,分布在福清县的平原,海滩地和山垄田,取得了比常规稻亩增100公斤以上的增产效益。倒种威优64在产量结构上表现为有效穗与穗粒数适宜,分别为21.7万穗和81.1粒,次数分布近正态,极值比例少;结实率和千粒重较常规稻高,分别为80.3％和27.2克。但与早季种植相比存在一定差异;表现为穗粒数减11粒,结实率减6.48％,这与早晚季的营养积累有关,据观察,倒种的叶片数比旱季种植减每株0.55叶,株高减9.35厘米。
Since 1984, Fuqing County has the high yield, stable yield, wide adaptability, strong resistance, short duration of the hybrid varieties Weiyou 64, 1986 to promote the area of 30471 acres, accounting for 15.2% of the county late rice area, , Distributed in the plains, beach and mountain ridge fields in Fuqing County, achieved more than 100 kilograms of conventional rice yield increase yield. The yield structure of the weevil, Weiyou 64, showed that the effective spikes and spikelets were suitable, which were 217000 spikes and 81.1 grains respectively, the number distribution was near normal and the ratio of extremum was less. The seed setting rate and grain weight were higher than conventional rice 80.3% and 27.2 grams. But there were some differences compared with those in the early planting. The results showed that the number of grains per ear was reduced by 11 grains and the seed setting rate was reduced by 6.48%, which was related to the nutrient accumulation in the early and late seasons. It was observed that the number of fallen leaves was 0.55 Leaves, height reduction of 9.35 cm.