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为了深度开发自然资源 ,改革耕作制度 ,优化作物结构 ,提高粮食产量和质量 ,以求解决人增地减和退耕还林 ,特别是玉米供求矛盾紧张的状况 ,我们在前几年试验研究的基础上 ,１９９９年在川西北旱区的中江、三台等县进行玉米超常早播 ,春秋双季玉米试验示范 ,取得了增产增收的效?
In order to deeply exploit natural resources, reform farming system, optimize crop structure and increase grain yield and quality so as to solve the problem of increasing population and reducing land and returning grain for forestry, especially the contradiction between supply and demand of maize, the basis of pilot study in previous years On 1999, in early spring in north China’s arid area of Zhongjiang, three counties corn abnormal early sowing, spring and autumn double season corn trial demonstration, and achieved the effect of increasing production and income?