垄沟集雨覆盖对旱作马铃薯块茎淀粉颗粒形态、颗粒分布及糊化特性的影响

为探讨垄沟集雨覆盖栽培对旱作马铃薯块茎形成过程中淀粉颗粒形态、颗粒分布及糊化特性的影响,以马铃薯栽培品种青薯9号为材料,设置全膜双垄(M2)和地膜垄作(M1)覆盖栽培模式,以露地平播为对照(MO),采用扫描电镜、激光粒度仪、粘度分析仪,测定马铃薯块茎形成过程中淀粉的颗粒形态、分布及糊化特性指标.结果表明,从块茎发育全程...

Effects of Mulching on Ridge-Rurrow for Harvesting Rainwater on Starch Granule Morphology,Distribution and Starch Gelatinization Properties of Tuber in Rainfed Potato

In this study, potato variety of Qingshu No.9 was employed as test material. A field experiment was conducted with two different cultivated patterns to investigate the effects of mulching on ridge - furrow for harvesting rainwater on starch granule morphology, distribution and starch gelatinization properties of tuber in rainfed potato during tuber formation with the bare land flat sown as the control. The cultivated patterns included the whole plastic mulching on double ridges and single ridge mulching with plastic film. The related indicators about starch granule morphology, distribution and starch gelatinization properties were detected by Scanning Electron Microscope, Laser Particle Sizer and Rapid Viscosity Analyzer, respectively. The results showed that starch granule average size, peak viscosity, though viscosity and final viscosity were the highest under whole plastic mulching on double ridges in the whole process of tuber formation. Starch granule dispersion, breakdown value and setback value were the highest under single ridge mulching with plastic film. There was no significant difference in starch granule morphology and pasting temperature between cultivated patterns. Furthermore, starch granule average size had a significant positive correlation with viscosity at different stage, a significant negative correlation with pasting temperature, but no significant correlation with breakdown value and setback value. However, there was no significant correlation between starch granule dispersion and gelatinization properties. Therefore, whole plastic mulching on double ridges could produce starch with better quality.