【摘要】 采取随机抽样法，在干旱年份和丰水年份对土壤养分和小麦产量及构成的关系做了大量分析研究。结果表明：干旱年份，碱解氮、有机质对产量没有太大的影响，相反，速效磷和速效钾与产量关系密切。丰水年份，碱解氮、速效磷、速效钾及有机质与产量相关系数达显著水平，尤其与穗粒数和千粒重有着极好的相关性。应引起我们注意的是钾的作用，不管在何种年份，钾与产量及穗粒数和千粒重相关系数都达显著水平，说明在今后小麦生产中应重视钾肥的应用。更多还原

【Abstract】 The rela ltionship between soil nutrient and wheat yield (including the components ofyield) was studied in a dry (1994-95) and a wet (1995~ 1996) year by using stochastic sampling method. The results showed that Alkali-hydro N and soil organic matter do not affectwheat yield but Olsen-P and Exchangeable K have a close correlation with grain yield in a dryyear. In a wet year, Alkali-hydro N, Olsen-P, Exchangeable K and soil organic matter havea sighificant correlation with grain yield, especially with the kernel number per spike and 1000kernel weight. It is worth notice that Exchangeable K is closely correlated with grain yield, kernel number per spike and 1000 kernel weight. This indicates that yield-increasing role of potassium should be emphasised for wheat production in the future.更多还原