近年来,我县大面积栽培的杂交稻获得了高产。据统计, 1983年全县栽培杂交稻16万亩,平均亩产达1115斤,1984年栽培23万亩,亩产1212.7斤;1985年20亩,亩产达1232.2斤。又据1983～1985年全县的测产资料,630块田杂交稻(杂交组合为汕优6号、泗优6号、南优5号)平均亩产1220斤,平均每亩穗数19.78万,每穗总粒144.16粒,实粒18.79粒,结实率82.4％,千粒重26克。在上述产量构成因素中,千粒重比较稳定,年际间差异小,变幅为25.9～26.1克;每穗总粒数和结实率在年际间的差异较大,变幅分别为39.0～147.1粒和80.97～84.2％,由此构成的每穗实粒数在年际间也有较大的差异,变幅为117.03～119.74粒,对产量影响较大;每亩穗数在年际间差异很小,变幅为19.68 In recent years, large-area hybrid rice cultivation in our county has achieved high yield. According to statistics, in 1983, the county cultivated 160,000 mu of hybrid rice with an average yield of 1115 jin. In 1984, 230,000 mu of cultivated rice were harvested, yielding 1212.7 kg of mu. In 1985, 20 mu of mu was produced with a yield of 1232.2 kg per mu. According to the survey data from 1983 to 1985, the average yield per mu of 630 paddy hybrid rice (Shanyou 6, Siyou 6, Nanyou 5) was 630 kg per mu and the average number of panicles per acre was 197,800 , 144.16 grains per panicle, 18.79 grains, 82.4% seed setting, and 26 grains weight per thousand. Among the above-mentioned yield components, the 1000-grain weight was relatively stable, with a slight difference between years, ranging from 25.9 to 26.1 grams. The difference in total grain number and seed setting rate between spikes was significant in the interannual period, ranging from 39.0 to 147.1 grains And 80.97 ~ 84.2%, respectively. The number of grains per panicle also varied greatly from year to year, ranging from 117.03 to 119.74, which had a great impact on the yield. The difference in the number of spikelets per acre was very small , A change of 19.68