花后高温对春小麦籽粒淀粉含量及产量的影响研究

春小麦灌浆期频繁遭受高温危害,严重影响了小麦产量和品质.本研究在盆栽条件下,探讨了花后高温对春小麦淀粉形成和产量的影响.结果表明,灌浆期高温使春小麦籽粒直链淀粉含量上升,支链淀粉含量下降,直/支比增大,总淀粉降低显著,淀粉品质下降.花后高温降低了春小麦籽粒淀粉,导致春小麦产量大幅度下降.因此,采取相应栽培技术缓解花后高温危害,可以在一定程度上提高宁夏春小麦的产量.

Study on the Effect of High Temperature after Anthesis on Starch Formation and Yield in Spring Wheat

Spring wheat frequently subjected to high temperature damage,seriously affecting the yield and quality.In this study,spring wheat were plantd under the conditions of high temperature and studied the change of yield of starch formation.The results showed that daring wheat grain filling stage,amylase content increased and amyl pectin decreased,amylase/amyl pectin ratio increased significantly,total starch content and starch quality degraded.High temperature after flowering reduced starch content and yield.So,took a cultivation techniques to remit hazard of high temperaure after flowers could improve the yield of spring wheat in Ningxia,to a certain extent.