前杨大队,几年来不断总结“两杂”制种经验,去年在1,011亩晋杂1号制种田中,试验了“增母串带”的制种新方法,获得平均亩产451斤的好收成,比1974年亩产391斤增产16%。实践证明:增母串带是提高制种田产量的一项有效措施。增母串带的具体方法增母串带,即增加母本的行数,适当串带父本。行比分两组试验处理:一组处理780亩,18行母本、2行父本,并在母本行中每隔40～50米,横串一条0.2～1.5米宽的父本带;另一 Former Yang Brigade, the past few years continue to sum up “two hybrid” seed production experience last year in 1,011 acres of Jin hybrid No. 1 system of farming, the trial of “increasing by string” of seed production method, access to an average of 451 kg per mu The harvest, an increase of 16% over the yield of 391 kg per mu in 1974. Practice has proved that increasing mother stringing is an effective measure to increase the output of farming system. Increasing mother string with a specific method of string mother string, that is, increase the number of female parent rows, the appropriate string father. The test scores were divided into two groups: one group with 780 mu, 18 maternal and 2 paternal males, and a paternal line of 0.2 to 1.5 meters wide at intervals of 40 to 50 meters in the maternal line. one