| 氮肥与密度对青贮玉米产量和品质的影响 |
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| 引用本文： | 屈绳娟,沈益新.氮肥与密度对青贮玉米产量和品质的影响[J].江苏农业学报,2009,25(3). |
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| 作者姓名： | 屈绳娟 沈益新 |
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| 作者单位： | 南京农业大学动物科技学院,江苏南京,210095 |
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| 基金项目： | 华东农区现代奶业生产技术集成及产业化示范 |
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| 摘 要： | 以渝单8号为材料,采用田间试验比较研究了100 kg/hm2、200 kg/hm2、300 kg/hm2和400 kg/hm2 4个氮肥(纯氮)水平及1 hm260 000 株、75 000 株、 90 000 株、105 000 株和120 000 株 5个种植密度对青贮玉米的产量和品质的影响.结果表明,蜡熟期单位面积地上部干物质产量随施氮量和密度的增加而增加;但果穗率在施氮量适中时即200 kg/hm2和300 kg/hm2时大于处理100 kg/hm2和400 kg/hm2.地上部干物质中粗蛋白含量随施氮量的增加而增加,但随密度增加有下降的趋势;单位面积粗蛋白产量在氮肥水平300 kg/hm2和1 hm290 000 株时最大.地上部干物质中中性洗涤纤维含量随施氮量的增加略有降低,但各施氮处理间差异不显著(P>0.05);酸性洗涤纤维含量随密度的增加呈上升趋势.综合氮肥与密度处理对青贮玉米地上部干物质产量及饲用品质的影响,施纯氮300 kg/hm2、密度1 hm290 000 株为南京地区渝单8号青贮栽培利用的适宜组合.
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| 关 键 词： | 青贮玉米 氮素水平 种植密度 产量 品质 |
Effect of Nitrogen Application and Planting Density on Forage Yield and Quality in Maize(Zea mays L.) |
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| QU Sheng-juan,SHEN Yi-xin.Effect of Nitrogen Application and Planting Density on Forage Yield and Quality in Maize(Zea mays L.)[J].Jiangsu Journal of Agricultural Sciences,2009,25(3). |
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| Authors: | QU Sheng-juan SHEN Yi-xin |
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| Institution: | College of Animal Science and Technology;Nanjing Agricultural University;Nanjing 210095;China |
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| Abstract: | The response of forage yield and quality to nitrogen application and planting density of maize(Zea mays L.) hybrid CV.Yudan 8 was tested in a field experiment.Dry matter(DM),Crude protein(CP),neutral detergent fiber(NDF),acid detergent fiber(ADF) and in vitro dry matter digestibility(IVDMD) of forage were determined at waxen maturity stage after harvested.The results showed that nitrogen application and planting density affected the DM yield of overground part significantly.Dry matter forage yield overgroun... |
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| Keywords: | silage corn nitrogen rate planting density forage yield quality |
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