| 种植密度与化学调控对春玉米茎秆性状及抗倒伏能力的影响 |
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| 引用本文： | 于玮淇,王芙臣,杜伟嘉,刘浩,孙宁,孟祥盟,边少锋.种植密度与化学调控对春玉米茎秆性状及抗倒伏能力的影响[J].玉米科学,2022,30(5):71-79. |
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| 作者姓名： | 于玮淇 王芙臣 杜伟嘉 刘浩 孙宁 孟祥盟 边少锋 |
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| 作者单位： | 延边大学, 延吉 133200;吉林省农业科学院农业资源与环境研究所, 长春 130033;吉林省农业科学院农业资源与环境研究所, 长春 130033;吉林农业大学, 长春 130118 |
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| 基金项目： | 吉林省农业科技基本科研经费项目(KYJF2021ZR020)、吉林省农业科技创新工程项目(CXGC2021TD003)、基于覆盖作物的坡耕地农田生态环境治理技术研究(20210203009SF) |
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| 摘 要： | 以迪卡 159为供试材料，设置 6.0×104(D1)、 7.0×104(D2)、 8.0×104(D3)和 9.0×104株/hm2(D4) 4个密度水平，在 8展叶期喷施化控剂玉多十(HK)和清水为对照(CK)2个处理，研究不同种植密度与化学调控技术对植株茎秆性状的影响。结果表明，随种植密度的增大，迪卡 159的株高、穗位高显著增高，茎秆节间长变长，茎粗变小，扁率增大，茎秆强度变弱。HK处理后，株高、穗位高显著降低， 4～5节位节间长大幅度减少，茎粗增加，扁率降低，茎秆强度增强，茎秆横折强度与穿刺强度在 3个时期均随种植密度的上升呈现整体下降趋势，并于乳熟期达到最大值。HK处理后，茎秆的横折强度与穿刺强度增强，其中， 4～5节位提升幅度最大。HK处理增加了灌浆期与乳熟期第 3节位的木质素与纤维素含量， D1、 D2、 D4密度下效果显著。倒伏率随种植密度的升高呈上升趋势； HK处理可以显著降低倒伏率， 4个密度下分别比对照降低了26.15%、 47.72%、 35.17%和33.82%。
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| 关 键 词： | 春玉米 化学调控技术 茎秆形态性状 茎秆力学性状 |
| 收稿时间： | 2021/8/11 0:00:00 |
Effects of Planting Density and Chemical Regulation on Stem Traits of Spring Maize |
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| YU Wei-qi,WANG Fu-cheng,DU Wei-ji,LIU Hao,SUN Ning,MENG Xiang-meng,BIAN Shao-feng.Effects of Planting Density and Chemical Regulation on Stem Traits of Spring Maize[J].Journal of Maize Sciences,2022,30(5):71-79. |
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| Authors: | YU Wei-qi WANG Fu-cheng DU Wei-ji LIU Hao SUN Ning MENG Xiang-meng BIAN Shao-feng |
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| Institution: | Yanbian University, Yanji 133200;Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun 130033;Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun 130033;Jilin Agricultural University, Changchun 130118, China |
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| Abstract: | Dika 159 was used as experimental materials. Four density levels of 6.0×104 plants/ha(D1), 7.0×104 plants/ha(D2), 8.0×104 plants/ha(D3) and 9.0×104 plants/ha(D4) were set. At 7-8 leaf development stage, experimental treatments sprayed chemical YuDuoShi(HK) and control group only sprayed water(CK). The results showed that with the increase of planting density, the plant height and ear height of Dika 159 increased significantly, the internode length became longer, the stem diameter became smaller, the flattening rate increased, and the stem strength became weaker. In HK treatments, plant height and ear height decreased significantly, internode Growth at 4- 5 nodes decreased, stem diameter increased, flattening rate decreased, and stem strength increased. Stem transverse crushing strength and puncture strength showed an overall downward trend with the increase of planting density at three stages, and reached the maximum value at milk stage. In HK treatments, the transverse crushing strength and puncture strength of the stem were enhanced, and the increase range of 4-5 node was the largest; HK treatment increased the lignin and cellulose content of the third node at the filling stage and milk stage, and the effect was significant at D1, D2 and D4. HK treatment could significantly reduce the lodging rate, which decreased by 26.15%, 47.72%, 35.17% and 33.82% respectively compared with the control. |
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| Keywords: | Spring maize Chemical control technology Stem morphological character Stem mechanical character |
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