种植密度与化学调控对夏播青贮玉米产量的影响  

Effects of Planting Density and Chemical Regulation on Yield of Summer Silage Maize

作　　者：兰宏亮[1] 王海波[1] 付铁梅[2] 周永香 

机构地区：[1]北京市农业技术推广站,北京100029 [2]北京市房山区农业科学研究所,北京102446 [3]北京市通州区农业技术推广站,北京101100

出　　处：《作物杂志》2014年第2期80-83,共4页Crops

基　　金：北京市农业局2013年科技新星计划项目"青贮玉米不同密度下化控剂的应用效果研究"

摘　　要：以夏播青贮玉米农大108为试材,设置5个种植密度(6.75万、9.00万、11.25万、13.50万和15.75万株/hm2)及采用膦酸胆碱合剂(ECK)处理,研究了种植密度与化学调控对青贮玉米产量的影响。结果表明:随着种植密度的增加,农大108的鲜重产量和干物质产量呈先增加后下降的趋势,均在种植密度为13.50万株/hm2时取得最大值;经ECK处理后,农大108不同密度下单株性状和群体质量均有改善,其青贮产量最高值出现在15.75万株/hm2时。研究表明,ECK能缓解夏播青贮玉米群体的密度效应,为实现群体高产稳产提供技术支持。In order to study the effects of planting density and plant growth summer silage maize varietiy Nongda 108 was used to set five planting 135 000,157 500plants/hm^2） and to be treated with synthetic plant growth regulators on the yield of silage maize, densities （ 67 500,90 000, 112 500, regulators （ECK）. The results showed that along with planting density increased,the biological yield and dry weight of Nongda 108 were firstly increased and then decreased successively, and reached the maximum at 135 000plants/hm^2. By spraying ECK at the 6-leaf expended stage of maize, the plant agronomic traits and yield components of silage maize under high plant density were greatly improved and reached the maximum at 157 500plants/hm^2. ECK can decrease the density effect of silage maize population and aoolv technical sunnort for improving the silage maize yield of high-density.

关 键 词：青贮玉米 种植密度 膦酸胆碱合剂 产量 

分 类 号：S513[农业科学—作物学]