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1975～1976两年各省、区试种证明,杂种水稻的增产效果是显著的。生产上已出现要大干快上的形势。这就要求制种工作要尽快提供出量多质纯的杂种种子,从目前各地制种的产量来看,是远不能适应形势发展的需要的。目
Two provinces in 1975 ~ 1976 two years, area test proved that hybrid rice yield increase effect is significant. The situation in production has changed dramatically. This requires that seed production be provided with as many kinds of pure and pure hybrid seeds as soon as possible. From the current output of seed production around the country, it is far from being able to meet the needs of the development of the situation. Head