【摘要】 为筛选耐盐碱向日葵品种,以14个向日葵材料作为试验材料,从盐胁迫对向日葵农艺性状、产量性状的影响及生理生化响应等方面入手,并通过灰色关联度分析和通径分析,探讨了盐胁迫下向日葵产量形成的主要因素。结果表明:0.26%盐分胁迫下与小区产量相关度最大的农艺性状是叶片数。0.39%盐胁迫下与小区产量相关度最大的农艺性状是株高。0.83%盐胁迫下与小区产量相关度最大的农艺性状是叶面积。0.26%盐胁迫下与小区产量关联度最大的产量性状是百粒质量。0.83%盐胁迫下与小区产量关联度最大的产量性状是单盘粒重。通径分析结果表明,盐含量为0.26%时,株高、盘径、百粒质量和结实率对向日葵小区产量具有较大的正向效应,其中百粒质量对小区产量的正向效应最大;盐含量为0.39%时,株高、盘径、百粒质量对向日葵的小区产量有较大的正向效应,但结实率的正向效应较小;盐含量为0.83%时,单盘粒质量对向日葵的小区产量有较大的正向效应,但结实率、百粒质量的正向效应较小。更多还原

【Abstract】 To screen the sunflower varieties with salt tolerance,14 sunflower material as the experimental material,starting from the effects of salt stress on sunflower agronomic traits,yield traits and physiological and biochemical response,and through gray correlation analysis and path analysis,discusses under salt stress of sunflower yield formation factors. The main results are as follows: 0. 26% stress associated with yield of agronomic traits is the number of blades. In 0. 39% under salt stress related to yield traits of maximum height. In 0. 83% under salt stress related to yield the greatest degree of agronomic traits of leaf area. Under salt stress is relatively light yield and maximum yield correlation is 100 grain. Under severe stress and maximum yield correlation of yield is a single disc grain weight. Under different concentration of salt,the response in the growth index of the sunflowers differences. Differences related to yield traits on stress of different concentrations of salt is also great. The same index in different salt stress,positive and negative effects on yield are also different.更多还原