灌水时期对小麦产量及水分利用效率的影响

采用裂区设计,研究了不同灌水时期对小麦产量和水分利用效率的影响。结果表明,冬前限量灌水塌实了土壤,促进了小麦冬前分蘖和次生根喷发,提高了成穗数,从而提高了产量;配合孕穗期增量灌水小麦产量最高、水分利用效率最高;配合拔节期增量灌水产量和水分利用效率均次之,且二者间差异不显著。

Effect of Irrigation Times on Yield and Water Use Efficiency of Wheat

Using split-plot design,effect of irrigation times on yield and water use efficiency in wheat was studied.Results showed that,limited irrigation before winter compacted the soil,increased total tillers,and created secondary roots.So total earnumber and wheat yields were both increased.After increasing irrigation on booting stage,yield and water use efficiency was the highest.And after increasing irrigation on jointing stage,yield and water use efficiency took the second place.But these two treatments had no significant differences.