【摘要】 利用长期肥料定位试验(不考虑交互作用),尽量保证其他条件一致的情况下用差减法分别计算了14年来气候、施肥、土壤肥力对玉米产量的影响程度。结果表明,在这3种主要影响因素中,气候因素对玉米产量的影响程度最大,并且随施肥量而不同,9个处理平均为87%,其中对N、PK处理影响最大。施用有机肥和秸秆还田可减轻不良气候对玉米产量的影响;施肥对玉米产量的影响程度次之,随年份不同变化较大;土壤肥力对玉米的影响程度在3种影响因子中最小,随施肥时间的增加没有明显变化,14年的平均值为60%。更多还原

【Abstract】 Effects of climate,fertilization,soil fertility on maize yield were researched in long-term fertilization experiment in fluvo-aquic soil during 1990-2004.The results indicated that among the main factors,climates influenced the largest extent on maize yield in difference fertilization treatments,varied from 85% to 115% with the mean was 87%,in which N fertilizer was affected by the climate to the largest extent,and MNPK,SPK treatments to the least extent,manure and straw could reduce the effect extent 11%-14%;Fertilization influenced the maize yield 52%-81%,ranged the second,the effect extent changed with years irregularly;Soil fertility affected the maize yield in the range of 49%-69%,averaged 60% in 14 years,had unobvious change with fertilization time;The order of effect extent was: climate>fertilization>soil fertility.更多还原