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我省棉区,自50年代开始就开展了机播作业,经过30多年的生产实践,充分证明机播是保证棉花增产的一项有效措施。据调查,在土质和管理等条件相同或近似的情况下,机播比耧播(畜力)亩增产10％左右。1957年22个县43个对比点调查,机播每亩平均产量197.6斤,耧插亩产185.1斤,多收12.5斤,增产6.8％。1964年成安县搞了3730亩的棉花机播示范田,亩产151斤,而用耧播的亩产仅106斤,增产45斤。1978年正定县南永固大队种棉350亩,全部实行机播,亩产平均174斤,超过全县平均产量一倍多。棉花机播增产主要是提高播种质量,实现一次全苗。俗话说:“见苗三分收”,说明全苗对增产的重要。机播能保全苗这是由于机械的科学构造所决定的,它的开沟器有限深板控制,所以能保持深浅一致,而畜力耧播是由人控制。机播的深、浅
Cotton province in our province has carried out the machine-sowing operation since the 1950s. After more than 30 years of production practice, it has been fully proved that machine sowing is an effective measure to ensure the cotton yield. According to the survey, when the conditions of soil and management are the same or similar, the planting and sowing (animal power) mu increases about 10%. In 1957, 22 counties and 43 comparison points were surveyed. The average yield per acre was 197.6 kg, 185.1 kg per mu per mu, 12.5 kg more, an increase of 6.8%. Cheng’an County in 1964 engaged in 3730 acres of cotton machine demonstration field, 151 kg per mu, while the broadcast of mu yield of only 106 pounds, an increase of 45 pounds. In 1978, Zhengding County Southern Yonggu Group brigade of 350 acres of cotton, all the implementation of machine-sowing, mu yield average 174 pounds, more than double the county average output. Cotton machine sowing mainly to improve the quality of sowing, to achieve a full seedlings. As the saying goes: “see seedlings three points received”, indicating the importance of the whole plant on the yield. This is due to the mechanical structure of the scientific decision, its opener limited depth control, so to maintain the same depth, and animal power broadcast is controlled by the people. Machine broadcast deep, shallow