不同熟期玉米品种春夏套作对籽粒淀粉含量及糊化特性的影响

试验以早、中、晚熟代表品种鲁原单14（LD14）、掖单22（YD22）和掖单13（YD13）为对象，两两相互套作，研究春夏玉米套作对玉米淀粉含量、组成及糊化特性的影响。结果表明，同一品种春玉米与不同品种夏玉米套作，春玉米的淀粉含量、组成及糊化特性无显著差异，但不同品种间差异显著。与不同品种春玉米套作，夏玉米淀粉含量、

Effects on Paste Properties and Starch Contents of Different Maturity Maize Cultivars Relay-planting

Premature cultivars Luyuandan14(LD14), medium cultivars Yedan22(YD22)and late maturity cultivars Yedan13(YD13)were chosen, to study the effects of different maturity maize cultivars relay-planting on starch content and compositions and paste properties.It was split-plot designed,three different cultivars were relayed with each other.The results showed that relayed with different maturity summer-sown maize, the paste properties and starch content and composition of the spring-sown maize could not be affected obviously.But those of the summer-sown maize were affected remarkably.YD13/YD22 was the best relay-planting mode in which starch content and paste properties of both spring-sown and summer-sown maize cultivars were higher.Significant correlations among paste properties and starch content and its compositions were observed.Amylose content was negatively correlated with peak viscosity, trough, break down and final viscosity, positively correlated with setback and peak time.While the relationship between starch content, amylopectin content, amylopectin to amylose ratio and paste properties were contrary.Amylose content and amylopectin to amylose ratio can be used to evaluate the paste properties of grain starch.Peak viscosity was the most important trait of paste properties, which was positively correlated with trough, break down and final viscosity.