不同施肥量和种植密度对桂青贮一号玉米生长的影响  

Effect of different planting densities and fertilizer applications on the growth of silage maize variety Guiqingzhu 1

作　　者：陈桂兰[1,2] 阳康春[1,2] 黄革文[1,2] 蒙月群[1,2] 张述宽[3] 周颀[1,2] 覃娇燕[1,2] 刘大海[1,2] 蒋业钊[1,2] 

机构地区：[1]广西农业科学院桂中分院 [2]柳州市农业科学研究所,广西柳州545003 [3]广西农业科学院,南宁530007

出　　处：《南方农业学报》2011年第6期642-644,共3页Journal of Southern Agriculture

基　　金：广西农业科学院基金项目(桂农科[2010]30号);广西柳州市科学技术局项目(2009050604)

摘　　要：【目的】摸清桂青贮一号玉米品种的适宜种植密度和施肥量,旨在为桂青贮一号玉米高产高效栽培技术提供科学依据。【方法】采用肥料为主区、种植密度为副区的裂区设计,进行不同施肥量和种植密度试验试验,分小区收获并考种。【结果】A4处理（375.0kg/ha复合肥＋尿素489.1kg/ha＋钙镁磷肥441.2kg/ha＋氯化钾375.0kg/ha）的平均产量最高,为26623.5kg/ha,极显著高于其他处理;B4处理（69000株/ha）的平均产量最高,为26058.5kg/ha;相同施肥水平下,种植密度在一定范围内,桂青贮一号玉米产量随种植密度的增加而增高,随后又呈下降趋势;相同种植密度条件下,施肥水平在一定范围内时,桂青贮一号玉米的产量随着肥料施用量的增加而增加,随后又呈下降趋势。【结论】桂青贮一号玉米种植密度度为69000株/ha,施肥量为每公顷施用375.0kg复合肥作底肥,追肥每公顷施尿素391.3~489.1kg＋钙镁磷肥352.9~441.2kg＋氯化钾300.0~375.0kg时能获得较高产量。[Objective]The objective of the present study was to find out the proper planting density and rate of fertilizer application for silage maize variety Guiqingzhu 1 in order to develop its highly-efficient cultivation technique. [Method]The experiment was conducted in split plot design with three replicates with fertilizer application treatments in plots and planting density treatments in subplots. Agronomic traits of Guiqingzhu 1 were investigated and yield per plot were determined after harvest. [Result]Amongst the fertilizer treatments, the plants treated with A4 （375.0 kg/ha compound fertilizer＋489.1 kg/ha urea＋441.2 kg/ha calcium magnesium phosphate＋375.0 kg/ha potassium chloride） showed the highest average yield （26623.5 kg/ha）, which was significantly higher than the other treatments. While amongst the planting density treatments, the highest average yield （26058.5 kg/ha） was found in B4 treatment （69000 plants/ha）. Same trends of an initial increase followed by a decrease in average yield were observed with increasing planting density as well as fertilizer application rates. [Conclusion]The yield of Guiqingzhu 1 was found highest by applying 375.0 kg/ha compound fertilizer as the base fertilizer, and 391.3-489.1 kg/ha urea＋352.9-441.2 kg/ha calcium magnesium phosphate＋300.0-375.0 kg/ha potassium chloride as topdressing at planting density of 69000 plants/ha.

关 键 词：青贮玉米 桂青贮一号 密度 施肥量 产量 

分 类 号：S513.062[农业科学—作物学]