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1 水稻高产育种的必要性随着社会经济的发展,人口的不断增加,一方面需要进一步增加粮食产量,提高品质;另一方面,耕地面积不断缩减,土质恶化,水资源短缺等日趋严重,人均耕地面积大幅度下降,粮食供求出现很大的反差。据科学家测算,我国的人均耕地面积由解放初期的0.18hm~2下降到现在的0.1hm~2。我国人口到2030年将达到15亿,这时人均耕地面积将下降到0.07hm~2左右。我国人口的持续增长一直要维持到2044年。而全球人口增长速度大大高出世界产均数,2030年将比现在人口再翻一番,世界的粮食贮备已下降到危险警戒线之下。在今后,水稻增产的压力会更大。我国是水稻生产大国,稻谷产量占世界产量的32%,占我国粮食产量的44%。我国水稻生产的好坏,必将对国民经济发展和世界粮食供求产生深远的影响。我
The necessity of rice high-yielding breeding With the development of society and economy, the population is increasing. On the one hand, it is necessary to further increase grain yield and improve quality; on the other hand, the area of cultivated land is shrinking, soil quality is deteriorating, water resources shortage is becoming more and more serious, The area of arable land dropped sharply, and there was a great contrast between the supply and demand of grain. According to scientists’ calculations, the per capita arable land area in our country decreased from 0.18hm 2 to 0.1hm 2 now. China’s population will reach 1.5 billion by 2030, when the per capita arable land area will drop to about 0.07hm ~ 2. The continuous growth of our population has been maintained until 2044. The global population growth rate is significantly higher than the world average, by 2030 double the current population, the world’s food reserves have dropped below the danger cordon. In the future, the pressure on rice production will be greater. China is a big rice-producing country, with 32% of the world’s rice output and 44% of China’s grain output. The quality of rice production in our country will surely have a far-reaching impact on the development of national economy and the world grain supply and demand. I