Effects of Lodging Period and Degree on Wheat Yield

Huang Yingguang; Zheng Yihong; Yuan Yongsheng; Jing Shuxiang; Zhang Bin

doi:10.3969/j.issn.1001-4942.2014.06.013

Abstract：The results showed that lodging during heading to late filling stage all could lead to yield loss . The effect of lodging period on wheat yield was higher than that of lodging degree .The yield losses caused by lodging at initial grain filling stage , anthesis stage , mid-filling stage and late filling stage were 37 .29%, 29.36%, 10.80%and 4.26%respectively.And the more serious the lodging was, the bigger the loss was. The yield loss was mainly due to the decrease of grain number per spike and thousand -grain weight .Com-pared with control , the grain number per spike of flat lodging treatment at anthesis stage and initial grain filling stage decreased by 12.25% and 10.04% respectively, and that of leaning lodging treatment decreased by 4 .92%and 7 .28%respectively .Lodging at initial grain filling stage had the biggest effects on grain weight , then the mid-filling stage and anthesis stage , the late filling stage had the least .Except for anthesis stage , there was no significant difference on thousand -grain weight and yield between flat lodging and leaning lodg-ing treatment at the same stage .The results suggested that at the assessment of wheat yield loss at the late de-velopmental stage , the grain losses caused by different lodging degrees could be integrated , and the lodging period could be regarded as the primary evaluation basis .