氮、硫配施对弱筋小麦籽粒淀粉特性的影响

在大田条件下研究了不同氮、硫配施对弱筋小麦品种豫麦50籽粒淀粉特性的影响.结果表明:氮、硫及其互作对籽粒淀粉组分含量和直支比的影响均达到了极显著水平,氮肥对峰值粘度、低谷粘度、最终粘度和稀懈值的影响也达到了极显著水平,硫肥仅对稀懈值和糊化温度的影响达到了显著和极显著水平.每公顷施纯氮240 kg(N240)和纯硫20~60 kg(S20和S60)可提高总淀粉和支链淀粉含量,降低直链淀粉含量和直支比.每公顷施纯氮150 kg(N150)和纯硫20 kg(S20)可以提高峰值粘度、低谷粘度和最终粘度,改善淀粉品质.

Effects of Sulphur and Nitrogen Combined Application on Kernel-Starch Characteristics in Wheat Varieties with Weak Gluten

The study investigated the effects of nitrogen and sulphur combined application on kernel starch of the wheat variety Yumai 50 with weak gluten under field circumstances. It was shown that nitrogen-sulphur interaction exerted significant influence on both the compositions and amylose-amylopectin ratio of kernel starch, nitrogen fertilizers significantly affected the peak, trough and final viscosities and breakdown of kernel starch and sulphur fertilization only exerted sginifcant influence on the breakdown and pasting temperature. The fertilization at 240 kg nitrogen and 20-60 sulphur per hectare could raise the contents of the total starch and amylopectin and reduced the content of amylose and the amylose-amylopectin ratio. The fertilization at 150 kg nitrogen and 20 kg sulphur per hectare could raise the peak,trough and final viscosities thus improving starch quality.