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二年来,杂交水稻在莆田县连作双季稻区栽培有明显的高产优势。从现有推广种植的杂优组合看,以不育系的 V_(20)A 和珍汕97A,恢复系的 IR661、IR880较为理想。实践证明,凡是由此二个类型配成的组合,在生产中都能获得显著的增产效果。例如:1976年平原的埭里大队晚季杂优珍汕97A×IR661组合,一亩一分七厘,亩产1376.8斤。1977年早季,丰山大队杂优 V_(20)A×IR661组合,一亩一分三厘,亩产1414.3斤;埭里大队杂优 V_(20)A×IR880组合,一亩一分七厘,亩产1406.8斤;山区白沙大队杂优 V_(20)A×IR661组合,八亩九分一厘,亩产1230.3斤;华东大队杂优珍汕9.7A×IR880组合,一亩六分五厘,亩产1218.5斤。晚季,埭里大队杂优珍汕97A×IR661组合,一亩一分五厘,亩产
In the past two years, hybrid rice has obvious high yield superiority in continuous cropping double cropping rice in Putian County. Based on the existing hybrid combinations of planting and promotion, V66A and Zhenshan 97A of CMS lines and IR661 and IR880 of restorer lines are ideal. Practice has proved that any combination of these two types of dubbed in the production can be significantly increased yield. For example: In 1976 the plain in the evening in the brigade Yat Zhenshan late hybrid 97A × IR661 combination, a acre of seven cent, mu 1376.8 pounds. Early 1977, Fengshan Brigade hybrid V_ (20) A × IR661 combination, a acre of three cent per mu, yield 1414.3 kg; Tso brigade hybrid V_ (20) A × IR880 combination, Per mu yield 1406.8 kg; mountain Baisha Brigade hybrid V_ (20) A × IR661 combination of eight acres of nine cents per mu, yielding 1230.3 pounds; East brigade hybrid excellence Zhen Shan 9.7A × IR880 combination of six acres of acre %, 1218.5 kg per mu. In the late season, in the brigade hybrid Zhen Shan 97A × IR661 combination, acre of five cents per mu, mu