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我县从1978年开始小面积棉花杂种优势利用示范,1979年种植杂种391亩,制种400亩。通过两年来的实践证明,推广棉花杂优,有广阔的前途。 棉花杂优利用好处很多,概括起来有几个显著特点: (一)增产多、见效快。棉花杂种一代一般能增产20—30％,若管理得好,充分发挥潜力,则增产更多;杂种二代仍能增产。如1978年万户公社农科所播的一块中棉所7号×徐州142示范地,77年久旱高温的条件下,亩产皮棉203.3斤,比对照品种增产22％,杂优示范田比高产示范田增产35.5％,比一般大田增产一倍以上。我们抓住这个典型,在县委的统一领导下,组织全县参观
Since 1978, the county started to demonstrate the utilization of small-area cotton hybrids. In 1979, 391 mu of hybrids were planted and 400 mu of seed were planted. After two years of practice, it has been proven that there will be a bright future in popularizing cotton hybrid. There are several advantages to using cotton hybrids in many ways. To sum up, there are several notable features: (1) more yield and quick results. Cotton hybrids generally increase yield 20-30%, if managed well, give full play to potential, then increase more; hybrids can still increase production. For example, a piece of Zhongmian No. 7 × Xuzhou 142 piloted by the Agricultural Bureau of Wanzhou Commune in 1978 showed 203.3 kg of lint per mu at a long time of 77 years of drought and a yield increase of 22% over that of the control varieties. High-yield demonstration farm yield 35.5%, more than double the average yield field. We seize this typical, under the unified leadership of the county Party committee, organize the county visit