环境因素对大豆化学品质及产量影响研究Ⅱ.遮光对大豆化学品质及产量的影响

研究表明,遮光对大豆的产量及品质有一定的影响作用.随着遮光时数的增多,也就是日照时数的减少,大豆子粒的蛋白质含量、脂肪含量、蛋脂总量及产量都有显著的变化.但品种的遗传特性对化学品质及产量的影响大于遮光的影响.光照长度的影响作用不仅涉及光合时间而且与光周期本身的机制有关.遮光对大豆子粒产量及品质影响大小顺序为:产量(F=5.93**)＞蛋白质(F=3.16*)＞脂肪(F=2.61)＞蛋脂总量(F=0.64).

STUDY OF THE INFLUENCE ON SHADING DURATION TO YIELD AND QUALITY OF SOYBEAN

Shading duration had some effect on the yield and quality of soybean through analysis. Along with the increase of shading duration, and the decrease of sunshine duration, the content of protein was rising. When the sunshine duration was 12 hours, the content of protein reached the maximum value, and then dropped. This verified the previous viewpoints of short-time sunshine helpful to the forming of the protein. The changes of fat content were opposite to that of the protein. With the shortening of the sunshine duration, the fat content decreased. This showed that the content of protein and fat had the negative correlation. The circumstance that was advantageous to the forming of the protein was disadvantageous to the forming of the fat. With the increasing of the shading duration and the shortening of the sunshine hours, the plant height, the number of pods and seeds per pod decreased which made the yield of soybean dropped. The order of shading on the yield and quality of soybean was yield (F=5.93 * *)> the content of protein (F=3.16 *)>the content of fat (F=2.61)>the total content of protein and fat (F=0.64).