晚冬早春阶段不同增温持续期对冬小麦籽粒产量和品质的影响

he effects of different warming durations on grain yield and quality of winter wheat in late winter and early spring are not clear.Therefore, in this study, \'Hengguan 35\' (semi-winter) was used as the experimental material, and the field warming experiment was carried out after the vernalization of winter wheat through a simple polyethylene steel greenhouse, aiming to explore the effects of different warming durations in late winter and early spring on the grain yield formation and quality of winter wheat.The results showed that the spike number per unit area increased first and then decreased with the prolongation of warming duration. The kernel number per spike increased by 5.3~9.1grains, the 1000-grain weight increased by 1.5g~4.9g, the yield increased by 13.5%~22.9%, the grain protein content decreased by 2.2%~5.9%, the wet gluten content and sedimentation value decreased by 3.3%~4.6% and 1.2%~5.8%, respectively, while the grain starch content and protein yield per unit area increased by 1.0%~6.3% and 19.6%~30.7%, respectively.Comprehensive analysis of the change trend of grain yield and quality in different warming durations, the growth degree days of warming treatment during warming period increased by 156.1 C~181.2 C compared with CK, and the higher grain yield and protein yield could be obtained when the warming duration was 50d~56d.