Research of Winter Wheat Suitability Temperature Indicators Based on Winter Irrigation
Yang Guangxian
Hu Chengda
Peng Jiyong
Lu Honghua
Abstract：Pot experiments in two wintering periods during 2011-2013 were conducted by using high-low temperature controller box to investigate the effects of winter irrigation on wheat leaf physicochemical properties,yield composition and yield under different low temperature treatments (-9 ℃,-6 ℃,-3 ℃ and 0 ℃).The result showed that compared to 0 ℃,leaf chlorophyll content and stomatal conductance of-9 ℃ and-6 ℃ decreased significantly,while soluble sugar increased significantly (p ＜ 0.01).Irrigation could not eliminate the negative effects on winter wheat.Chlorophyll and soluble sugar content of-3 ℃ changed little,while stomatal conductance decreased in some degree,and the different was significantly (p ＜ 0.05).Irrigation led to different degrees of chlorophyll increasing and soluble sugar decreasing,had obviously positive effects on winter wheat.Irrigation had obvious positive effects on leaf chlorophyll,soluble sugar content and stomatal conductance under 0 ℃.Winter irrigated treatment under-6 ℃ and-9 ℃ led to decreasing of spikelet number per plant,kernel number per plant and kernel weight,while under-3 ℃ and 0 ℃,kernel number per plant and kernel weight increased.In conclusion,when the minimum temperature is-3 ℃ and above,winter irrigation is advantageous,while -6 ℃ and below,irrigation is not advantageous.
Keywords：winter irrigationchlorophyllsoluble sugarstomatal conductance
Publication Date：2017-04-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 39-43 )