不同遮光胁迫对大豆产量性状及产量的影响

STUDY OF THE INFLUENCE OF SHADING STRSS TO YIELD AND YIELD CHARACTERS OF SOYBEAN

通过遮光处理,研究不同遮光强度及遮光持续时间对大豆的产量性状及产量的影响,结果表明,播种后遮光20%时间持续到始粒以后,播种后遮光30%和50%时间持续到开花以后,单株荚数、单株粒数、单株粒重显著或极显著减少;遮光胁迫强度相同时,这些性状有随着接受遮光胁迫时间的延长受影响程度加大的趋势;同一遮光胁迫期间,这些性状有随着遮光胁迫强度的加强受影响程度加大的趋势。遮光胁迫对底荚高、单株有效分枝数、结实率有一定影响。同一遮光胁迫强度,遮光胁迫持续时间与小区产量呈显著或极显著负相关;同一遮光胁迫期间,遮光胁迫强度与小区产量呈显著或极显著负相关。

According to studying the influence of shading intension and shading duration to the yield and the yield characters of soybean. The results showed that, shading 20% from seeding to filling or to harvesting, shading 30% and 50% from seeding to flowering or to harvesting, the number of pods per plant, the number of seeds per plant and the seeds weight per plant decreased significantly. In the same extent of shading stress,with the increase of the time of shading,the influence to the yield characters was rising. In the same period of shading, among with the increase of the extent of shading, the influence to the yield characters was rising, and the effect of shading 50% is significant comparing with the effect of shading 20% and 30%, but the effect of shading between 20% and 30% is not significant. Shading stress had some effect on the lowest podding height,the number of branches per plant , the percent of setting and 100-seeds weight of soybean through analysis. The result showed that, the yield of plot,was significant negatively correlated with the time of shading intimidate of the same shading extent, was significant negatively correlated with the extent of shading among the same period of shading intimidate.