化控剂对不同密度青贮玉米生长和产量的影响  

Effect of Chemical Regulators on Plant Growth and Yield of Silage Corn under Different Planting Densities

作　　者：吴秋平[1] 蒋飞[1] 韩成卫[1] 刘保申[2] 马燕英 丁风云 孔晓民[1] WU Qiu-ping;JIANG Fei;HAN Cheng-wei;LIU Bao-shen;MA Yan-ying;DING Feng-yun;KONG Xiao-min(lining Academy of Agricultural Sciences/Jining Comprehensive Experimental Station of National Com Industry Technology System,Jining 272031;Agricultural College,Shandong Agricultural University,Tai'an 271018;Liangshan Bureau of Agriculture and Rural Affairs,Liangshan 272600,China)

机构地区：[1]济宁市农业科学研究院/国家玉米产业技术体系济宁综合试验站,山东济宁272031 [2]山东农业大学农学院,山东泰安271018 [3]梁山县农业农村局,山东梁山272600

出　　处：《玉米科学》2020年第4期61-66,共6页Journal of Maize Sciences

基　　金：山东省农业良种工程项目“优质高产耐盐碱青贮玉米新品种培育与示范”(2016LZGC001);国家现代玉米产业技术体系建设专项资金(nycytx-02);济宁市现代农业科技创新重点研发计划“土地规模经营模式玉米提质增效技术研究与示范”。

摘　　要：以饲草2号为试验材料,设6.0万、6.75万、7.5万株/hm^2共3个种植密度,于拔节期分别喷施多效唑、饱玉、矮跺垛3种化控剂,探究化控剂在不同种植密度下对青贮玉米生长和产量的影响。结果表明,与清水处理相比,3种化控剂均显著增加各时期叶片SPAD值。多效唑喷施明显增加株高、穗位高和叶面积系数,饱玉、矮跺垛喷施则使其降低。鲜物质产量和干物质产量在多效唑处理下较对照显著增加了2.2%和3.1%,饱玉、矮跺垛喷施后则显著减少了3.7%和3.8%、6.0%和5.7%。在7.5万株/hm^2种植密度下多效唑处理获得青贮玉米最高鲜物质产量和干物质产量,分别达82877 kg/hm^2和26189 kg/hm^2。In order to explore the effects of different chemical regulators on plant growth and yield of silage corn under different planting densities,Sicao No.2 was experimented under three types of chemical regulators with planting densities of 60000,67500 and 75000 plants/ha.The results showed that the three chemical control agent all improved leaf SPAD value at both stages.The plant height,ear height and the leaf index increased with sparing chemical regulator"Duoxiaozuo",but decreased under the chemical regulator of"Baoyu"and"Aiduoduo".The fresh matter weight and dry matter production of silage corn with spraying"Duoxiaozuo"then increased by 2.2%and3.1%compared to the water treatment,but decreased by 3.7%and 3.8%,6.0%and 5.7%with spraying"Baoyu"and"Aiduoduo"treatments respectively.The highest fresh matter weight and dry matter production were 82877 kg/ha and 26189 kg/ha after the treatment of"Duoxiaozuo"under the planting density of 75000 plant/ha respectively.

关 键 词：青贮玉米 化控剂 密度 生长发育 产量 

分 类 号：S513.O1[农业科学—作物学]