河北农业大学学报2025，Vol.48Issue(4)：47-58,12.DOI:10.13320/j.cnki.jauh.2025.0053
地下灌溉及灌水量对冬小麦根系生长、光合特性及产量的影响
Effects of subsurface irrigation and irrigation amount on root growth,photosynthetic characteristics and yield of winter wheat
摘要
Abstract
In order to explore the effects of irrigation methods and irrigation amount on root growth,photosynthetic characteristics and yield of winter wheat,a pot experiment has been applied in 2022-2024,on winter wheat variety Ping'an 11 with water supply methods as the main treatment as surface irrigation(I)and subsurface irrigation(SI),and water treatment as the subtreatments that control relative soil water content at 40%field capacity(W40),60%field capacity(W60)and 80%field capacity(W80).The results showed that subsurface drip irrigation significantly increased the root morphology of winter wheat at the middle and late growth stages(filling stage and mature stage)under drought stress conditions,and reduced the root attenuation rate.Compared with treatment I,the root length density,root surface area density and total root volume of winter wheat in SI treatment under limited water irrigation treatment(W60,W40)increased by 15.83%-56.31%,9.61%-44.65%and 5.82%-30.30%,respectively.The root decay rate of winter wheat decreased by 31.61%-47.50%,and the net photosynthetic rate,transpiration rate,stomat conductance and SPAD value of flag leaves of winter wheat under SI treatment increased by 5.78%-14.93%,6.51%-9.90%,11.08%-33.49%and 3.55%-36.13%,respectively.Under W60 treatment,the SPAD value attenuation rate of winter wheat SI treatment decreased by 39.16%;the dry matter and yield of winter wheat in SI treatment increased by 11.43%-27.90%and 25.05%-38.02%,respectively.The total irrigation amount of SI treatment was 9.95%lower than that of I treatment.The structural equation model showed that the dry matter accumulation,yield,net photosynthetic rate and transpiration rate of winter wheat under SI treatment were positively correlated.In summary,SI under water-limited irrigation treatment(W60,W40)can regulate and change root growth,effectively reduce the effect of soil moisture on photosynthetic characteristics of wheat leaves,ensure the stability of dry matter accumulation,and improve yield and water use efficiency.And W60 treatment is the optimal irrigation field capacity.关键词
地下灌溉/冬小麦/根系生长/光合特性Key words
subsurface irrigation/winter wheat/root growth/photosynthetic characteristics分类
农业科技引用本文复制引用
赵志恒,刘世龙,王景辉,周云飞,刘文杰,关小康..地下灌溉及灌水量对冬小麦根系生长、光合特性及产量的影响[J].河北农业大学学报,2025,48(4):47-58,12.基金项目
国家重点研发计划项目(2023YFD2301500). （2023YFD2301500）
