耕作方法、密度及施氮量对春玉米产量形成的影响  

Effects of Tillage,Plant Density,and Nitrogen Application Rate on Yield Formation of Spring Maize

作　　者：贾倩[1] 齐华[1] 吴亚男[1] 刘明[1] 于吉琳[1] 

机构地区：[1]沈阳农业大学农学院,辽宁沈阳110866

出　　处：《作物杂志》2012年第4期134-138,共5页Crops

基　　金：公益性行业(农业)科研专项经费(现代农作制模式构建与配套技术研究与示范);国家重点基础研究发展计划(973计划)(2009CB118601);"十二五"农村领域国家科技计划项目(2011BAD16B14)

摘　　要：以先玉335为试验材料,采用不同垄作方法、种植密度及施氮量对玉米产量及产量构成因素进行了研究。结果表明:不同耕法中,产量依平播垄管、垄播垄管、平播平管次序递减,与平播平管产量相比,平播垄管与垄播垄管分别增产了34.22%和32.80%;在试验设置的密度区间内,呈现种植密度愈大产量愈低的变化趋势;氮肥用量在112.5kg/hm2和225kg/hm2时,可以获得较高产量,不施氮和施氮量过大都会使产量降低。耕作方法、密度与氮肥可有效调控玉米的干物质积累动态,耕作方法配合适宜的密度与氮肥是确保合理干物质积累量动态的前提,也是高产形成的重要保证。The effects of different tillage,plant density and nitrogen application rate on yield and yield components of maize were analyzed using maize variety Xianyu335. The results showed that, compared to flatten seeding and flat- ten cultivation treatment, maize yeild was increased by 34.22% in fahten seeding and ridge cultivation treatment and 32.80% in ridge seeding and ridge cultivation treatment. Maize yield was decreased with the increasing of the plant density. The nitrogen at the rate of 112.5kg/hm2 and 225kg/hm2 could increase output better than the other two levels. The tillage, plant density and nitrogen application had significant effects on dry matter accumulation. To coordinate their relation properly is a premise and guarantee for dry matter accumulation and maize high-yielding formation.

关 键 词：春玉米 产量 耕作方法 种植密度 施氮量 

分 类 号：S513[农业科学—作物学]