为了研究三江平原大豆主栽品种蛋白质与脂肪含量及蛋脂总和的变化规律，选用不同年代18个同熟期的主栽品种为试验材料，采用田间小区试验方法，系统地研究主栽品种更替过程中品质性状的改进与变化规律。结果表明：随着年代的推进，脂肪含量无明显规律性变化，总体呈波动式降低趋势，变化幅度为19．88％～21．41％，平均脂肪含量为20．68％。阶段性变化：20世纪50年代到60年代呈增加趋势，60年代到80年代呈降低趋势，80年代到2000年后呈升高趋势；蛋白质含量也无明显规律性变化，总体呈升高趋势，变化幅度为37．22％～40．94％，平均蛋白质含量为39．34％。阶段性变化：20世纪50年代到80年代呈增加趋势，80年代到2000年后呈下降趋势；蛋脂总和无明显变化规律，总体呈波动式增加的趋势，幅度为58．34～60．81％，平均蛋脂总和为60．02％。%In order to study the change rule of the protein and fat and total content of main soybean cultivars in Sanjiang plain ,18 same maturity main production cultivars were selected as test materials and used in the field investigation as methods to research the quality characters traits improvement and change regular .The results showed that the fat content had no obvious regularity change and had a fluctuate reduce trend .The rangeability was from 19 .88% to 21 .41% ,the mean value was 20 .68% .The stage change showed that from the 1950s to 1960s had a increase trend ,from 1960s to 1980s had a reduce trend ,from 1980s to the year of 2000 had a in‐crease trend .The protein content had no obvious regularity changes and had a increase trend .The rangeability were from 37 .22% to 40 .94% the mean value was 39 .34% .The stage change show that from the 1950s to 1980s had a increase trend ,from 1980s to the year of 2000 had a reduce trend .The protein and fat total content had no obvious regularity changes and had a fluctuate increase trend .The rangeability were from 58 .34% to 60 .81% ,the mean value was 60 .02% .
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