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矮杆稻种的育成和应用,便于以多穗夺高产。各地高产样板田都曾接近或突破高产千斤。但近几年来,尽管在栽培上作了各种努力,试图再以增加每亩穗数夺取高产再高产,已经很困难,大面积亩产并无多大增长。究其原因,我们认为是没有突破性的品种(1500—2000斤)及相应的栽培方法。不少现有生产上栽培的品种如西南175,广二矮二号等每亩有效穗18万—28万都可以获得千斤产量,这一方面反映了穗实粒数与产量的
Breeding and application of dwarf rice varieties, easy to win more productive spike. High-yield model around the field have been close to or breakthrough high-yielding. However, despite various efforts in cultivation in recent years, it has become very difficult to attempt to increase the yield of high yield and then increase the yield by increasing the number of ears per mu. As a result, there is not much increase in large-area mu yield. The reason, we think there is no breakthrough breed (1500-2000 pounds) and the corresponding cultivation methods. Many cultivars cultivated in existing production such as Southwest 175, Guang Er Za Er, etc. have an effective yield of 180,000-28,800 per acre, which can reflect the grain yield per acre