Relation between Yields of Wheat Varieties Mainly Popularized in Different Eras and Soil Fertility in Shandong Province

山东省不同年代主推冬小麦品种与土壤肥力相互关系的研究（英文）

[Objective] This study was conducted to guide wheat production, variety breeding and extension. [Method] The evolution of agronomic traits and correlation between yield and agronomic traits of wheat varieties mainly popularized in different eras were investigated under high and low soil fertility conditions. [Result] Under dif- ferent soil conditions, there was a yield increasing trend, and the yield increasing degrees of varieties popularized in different eras were different. Soil fertility had no remarkable effects on grain number per spike, spike number, and yields of varieties popularized in the 1950s and the 1960s, while the differences in other indexes all reached the significant level. The interaction between fertility and variety had a greater effect on spike number. Under different soil fertility conditions, there were positive correlation between yield components, and the correlation coefficients were in order of spike number 〉 1 000-grain weight 〉 grain number per spike. Soil fertili- ty remarkably affected spike length and spikelet number. [Conclusion] High fertility could promote the coordinated growth of yield components.

[目的]指导未来小麦生产和品种选育及推广。[方法]以山东省内若干年代25个主推冬小麦品种为研究对象,旨在表明高、低肥力条件下品种产量的演变规律,明确农艺性状与产量间的相关关系。[结果]不同肥力条件下产量提高趋势相同,各年代高肥产量较低肥产量增产程度不同;土壤肥力对穗粒数、穗数、50及60年代小麦产量无明显差异,对其他指标差异均达到显著水平,肥力与品种互作对穗数影响较大;不同肥力下产量构成因素间呈正相关性,表现为:穗数>千粒重>穗粒数;土壤肥力对穗长、小穗数有明显影响。[结论]维持较高的地力条件,可促进产量构成因素协调增长。