不同播期对高粱籽粒淀粉积累规律及籽粒产量的影响

Effect of Different Sowing Dates on the Starch Accumulation and Yield in Sorghum Grains

本试验以高粱赤杂28为试验材料,研究不同播期对高粱淀粉积累规律及籽粒产量的影响。结果表明:高粱籽粒总淀粉、支链淀粉、直链淀粉含量和支链/直链淀粉比值,随籽粒灌浆过程推进均呈不断上升趋势,至成熟期达到最大值。其中第Ⅲ播期总淀粉和支链淀粉含量最高,分别为75.5%和66.91%,第Ⅴ播期直链淀粉含量最高为8.67%。第Ⅱ播期支链/直链淀粉比值最高为8.19。适时播种(赤峰地区在5月中旬)有利于提高高粱籽粒总淀粉、支链淀粉的含量,改善籽粒品质。适时晚播有利于籽粒直链淀粉含量的增加。适时播种能够提高高粱的产量。

The effect of different sowing dates on the starch accumulation and grain yield in sorghum hybrid"Chiza 28"was studied.The results showed that content of total starch,amylopectin,amylose and the ratio of amylopectin to amylose increased continuously along with the advance of grain filling process,reached the maximum at maturity stage.Total starch content and amylopectin content in sowing dateⅢwere the highest,at 75.5%and 66.91%,respectively.Amylose content in sowing dateⅤwas 8.67%,which is the highest.Ratio of amylopectin to amylose content in sowing dateⅡwas the highest at 8.19.Timely sowing(mid-May in Chifeng)promoted the increase of total starch and amylopectin contents,which improves sorghum grain quality.Feasible late sowing promoted the increase of amylose content.Timely sowing promoted the increase of yield of sorghum grain.