摘要
为确定春玉米生产中的合理施肥量,采用田间试验法,在蔚县选择不同肥力水平的10个点进行春玉米"3414+1"肥效试验。结果表明,不同肥力条件下的氮、磷、钾肥施用量与春玉米产量之间均有极显著的一元二次回归关系;春玉米最高产量和经济最佳产量时的氮、磷、钾肥施用量因土壤肥力不同而异。通过对试验结果分析,提出了蔚县不同肥力地块春玉米最高产量施肥量及经济最佳产量施肥量推荐范围;肥效利用率钾肥>氮肥>磷肥,且中高肥力土壤中钾养分对产量的限制较大,因此应适当增施钾肥,稳定氮磷肥,根据土壤养分供应能力进行分类指导、配方施肥。
To realize the reasonable fertilizer amount of spring maize in Yu county,the field experi-ment of “3414+1”was carried out in ten sites,which had different fertilities,by using field experiment method.The result shows that there was a highly significant simple quadratic regression correlation be-tween yield and the fertilizer amount of nitrogen,phosphorus and potassium.The fertilizer amount of max and optimum yield in different soil fertilities were different.The range of the reasonable fertilizer a-mount for the fertilizer amount of max and optimum yield was proposed in the field of the different fertili-ties by the experiment.The fertilizer utilization rate performed K>N>P.And the limit factor to yield of the potassium was higher than N and P.Therefore,K fertilizer should be properly increased,but the N and P should be stabled.Realizing reasonable fertilizer should accord to the soil capacity of supplying nu-trient.
出处
《河北北方学院学报（自然科学版）》
2015年第3期24-29,共6页
Journal of Hebei North University:Natural Science Edition
基金
国家测土配方施肥资金补贴项目(2010-163)
关键词
春玉米
“3414+1”试验
产量效应
推荐施肥量
养分限制因素
spring maize
'3414+1'fertilizer experiment
yield effect
recommend fertilizer amount
nutrient limit factor
