西藏高原地理与气候因子对青稞功能性成分的影响

为探明高原产地环境对青稞功能性营养成分的影响,对西藏18个县青稞的3个特质营养成分(β-葡聚糖、黄酮、花青素)进行了分析。结果表明:黄酮含量与年积温呈负显著相关,与海拔高度呈显著正相关。β-葡聚糖与年日照时数呈显著正相关;年降雨量对β-葡聚糖的抑制作用存在一定阈值,超过600 mm,β-葡聚糖含量明显降低;海拔在3 580～3 850 m范围,β-葡聚糖含量最高。年降雨量对有色青稞中花青素含量影响最大,海拔高度对不同颜色有色青稞中花青素含量的影响效果不同,其他因子对花青素含量影响均不显著。此研究可为西藏高原青稞育种、推广和加工提供理论依据。

Effects of Geography and Climatic Factors on Special Nutrients of Highland Barley in Tibet Plateau

In order to investigate the effect of plateau production environment on functional nutritional ingredients of highland barley, this paper analyzed 3 special nutritional ingredients of highland barly from 18 counties, including β-glucan, flavonoids and anthocyanin. The results showed that flavonoids was negative correlated with annual accumulated temperature, and positively correlated with altitude. There was certain threshold for the inhibitory effect of annual rainfall on β-glucan, when the annual rainfall was over 600 mm, β-glucan content would obviously decrease. The β-glucan content was the highest, when altitudes were in the scope of 3 580~3 850 m. Annual rainfall had the greatest influence on anthocyanin content in colored highland barley. The effects of altitude on anthocyanin content in different colored highland barley were different, while the effects of other factors on anthocyanin content were not significant. This study provided theoretical basis for breeding, popularization and processing of barley in Tibet plateau.