辽宁玉米生产条件下增施肥料增产作用研究  

Effect of Increasing Fertilizer Rate on Maize Yield-increasing Under Current Production Conditions in Liaoning Province

作　　者：史振声[1] 王健[1] 朱敏[1] 李凤海[1] 

机构地区：[1]沈阳农业大学特种玉米研究所,沈阳辽宁110866

出　　处：《耕作与栽培》2014年第5期1-3,8,共4页Tillage and Cultivation

基　　金：国家"十二五"科技支撑计划项目(2011BAD16B12);辽宁省重大重点项目(2011201018)

摘　　要：利用7个辽宁省主栽玉米品种,在三个生态区,历经过5年,对增加施肥量的增产效果进行研究.结果表明,在目前情况下,施肥量增加20％～30％以后并没有明显的增产效果：三个生态区平均增产3.7％,未达显著水平;不同生态区之间、不同耐密性品种之间、以及不同年份之间差异不大;增加施肥量对品种的适宜密度以及适宜密度范围也没有明显改变.认为耕层和土壤质量已经成为辽宁进一步增产和肥效发挥的首要限制因子,科学合理的耕地方式是辽宁玉米大幅度增产和可持续增产的出路所在.A 5--years field experiments were carried on to study the effect of increasing fertilizer rate on maize yield--increasing in three agriculture ecological zones using seven major maize hybrids in Liaoning province. The results indicated that, there was no significant yield - increasing effect when fertilizer rate increased 20%- 30% or more under current production conditions. The maize yield under three agriculture ecological zones increased 3.7 % averagely. The maize yield of different density--toler- ant hybrids under different ecological zones in different years had no significant differences. Increasing fertilizer rate did not change the suitable planting density and its suitable scope significantly. The results also showed that the plough layer and soil quality were the primary limitation factors for maize yield--increasing in Liaoning. Cultivated the land scientifically and reason- ably was the best way for maize sustainable yield--increasing.

关 键 词：玉米 施肥 产量 辽宁 

分 类 号：S513[农业科学—作物学]