CO_2对冬小麦和大豆籽粒成分的影响

Effects of CO_2 on the Grain Compositions of Winter Wheat and Soybean

采用开顶式气室对冬小麦、大豆进行不同ＣＯ２浓度处理，用紫外可见光光度计、蛋白质分析仪、气相色谱仪、ＹＧ－２脂肪提取器和半自动定氮仪等对成熟后冬小麦、大豆籽粒进行成分分析。结果表明，ＣＯ２浓度升高对大豆籽粒粗蛋白、粗脂肪含量均有正效应，随ＣＯ２浓度升高大豆籽粒不饱和酸含量增加，饱和酸减少。ＣＯ２浓度变化对冬小麦籽粒粗蛋白、赖氨酸的影响比较复杂，就蛋白质、赖氨酸２项指标，当大气中ＣＯ２浓度增加１倍，对目前冬小麦品种的籽粒品质的影响是负效应。

Winter wheat and soybean crops were treated with different CO_2concentrations in top- open chambers.The matured grains harvested from the crops were analysed for their compositions by using visible ultraviolet spectrometer, protein analyzer, gas chromatograph,YG- 2 fat extractor and automanual nitrometer. The results show that an increased CO_2concentration can have a positive effect on the contents of both rough protein and rough fat in soybean grain; and as the CO_2 concentration increases, the soybean grain would have an increased level of unsaturated acids and a decreased level of saturated acids. The change in CO_2 concentration had a more complicated effect on the levels of rough protein and lysine in winter wheat grain. In terms of both indicators of rough protein and lysine, a doubled concentration of atmospheric CO_2 had a negative effect on the quality of grains of the present varieties of winter wheat.