摘要
以郑青贮1号、北农青贮368和郑单958为试验材料,研究了施氮量、种植密度及品种互作对青贮玉米鲜草产量和干物质生物产量的影响。结果表明:品种(郑青贮1号、北农青贮368、郑单958)、施氮量(N_(1)、N_(2)、N_(3)分别为240、216、168 kg/hm^(2))和密度(D_(1)、D_(2)、D_(3)、D4分别为6.75万、7.50万、8.25万、9.00万株/hm^(2))对青贮玉米干物质生物产量和鲜草产量均有显著的影响,在相同的密度水平下,3个玉米品种的干物质生物产量随施氮量的减少,总体呈下降趋势,但是N_(1)和N_(2)处理之间无显著差异;在相同施氮水平下,3个玉米品种的干物质生物产量随密度的增加,总体呈现先上升后下降的趋势;在不同施氮量和种植密度条件下,正常施氮量且高密度种植条件下(N_(1)D_(3)、N_(1)D4)的产量表现为郑青贮1号>北农青贮368>郑单958;在正常施氮量且低密度种植(N_(1)D_(1)、N_(1)D_(2))和减氮条件下(N_(2)、N_(3))的产量表现为北农青贮368>郑青贮1号>郑单958。因此,综合考虑减氮增产高效的目标,氮肥减施10%(N_(2))的条件下,郑青贮1号和北农青贮368的推荐栽植密度为8.25万株/hm^(2),郑单958不推荐作为青贮玉米种植。
Zhengqingzhu 1,Beinongqingzhu 368 and Zhengdan 958 were used as experimental materials,and the effects of nitrogen application,planting density and varieties on dry matter yield and fresh yield were studied.The results showed that dry matter yield and fresh yield were significantly influenced by nitrogen fertilizer,planting density and variety.At the same density level,the dry matter yield and fresh yield of the three varieties decreased with the decrease of nitrogen application.However,there was no significant difference between N_(1) and N_(2) treatments.Under the same nitrogen application level,the dry matter biological yield of the three maize varieties showed a trend of first increasing and then decreasing with the increase of density.The orders of dry matter yield of three maize varieties was Zhengqingzhu 1>Beinongqingzhu 368>Zhengdan 958 under high density and conventional nitrogen application(N_(1)D_(3) and N_(1)D4).The orders of dry matter yield of three maize varieties was Beinongqingzhu 368>Zhengqingzhu 1>Zhengdan 958 under low density and conventional nitrogen application(N_(1)D_(1),N_(1)D_(2))and reduction of nitrogen(N_(2) and N_(3)).Therefore,the recommended planting density of Zhengqingzhu 1 and Beinongqingzhu 368 was 82500 plants/hm^(2) under the condition of 10%N reduction(N_(2)),and Zhengdan 958 was not recommended for planting as silage maize,which can achieve the target of higher yield by increasing density and reducing nitrogen.
作者
周波
韩小花
王延召
豆丽萍
高钰
黄凌
王小星
ZHOU Bo;HAN Xiao-hua;WANG Yan-zhao;DOU Li-ping;GAO Yu;HUANG Ling;WANG Xiao-xing(Institute of Cereal Crops,Henan Academy of Agricultural Sciences/Henan Key Laboratory of Corn,Zhengzhou 450002,China;Qingyang Academy of Agricultural Sciences,Qingyang 745000,China;Yuzhou Agricultural and Rural Bureau,Yuzhou 461670,China;Hebi Academy of Agricultural Sciences,Hebi 458030,China)
出处
《江西农业学报》
CAS
2024年第8期1-7,共7页
Acta Agriculturae Jiangxi
基金
国家重点研发计划项目(2016YFD0300309/03)
河南省科技攻关项目(172102110075)
庆阳市2021年市级科技计划项目“玉米种质创新及庆科玉系列玉米新品种选育”。
关键词
青贮玉米
干物质生物产量
氮肥
种植密度
Silage maize
Dry matter yield
Nitrogen fertilizer
Planting density
