| 不同春玉米品种茎秆显微结构对抗折强度的响应 |
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| 引用本文： | 蒋傲男,闫静琦,卢海博,赵海超,黄智鸿.不同春玉米品种茎秆显微结构对抗折强度的响应[J].玉米科学,2020,28(5):53-59. |
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| 作者姓名： | 蒋傲男 闫静琦 卢海博 赵海超 黄智鸿 |
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| 作者单位： | 河北北方学院/河北省农产品食品质量安全分析检测重点实验室, 河北 张家口 075000 |
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| 基金项目： | 河北省现代农业产业技术体系项目（玉米体系岗位专家）（HBCT2018020203）、河北省科技厅项目（18226334D）、张家口市科学技术局项目（1911012C） |
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| 摘 要： | 以冀西北寒旱区9个春玉米品种为研究对象,通过测定玉米基部第3节抗折强度,利用光学显微镜观察其茎节显微结构,对维管束各项显微指标与节折强度进行相关分析,研究春玉米节折强度与茎秆显微结构之间的关系。结果表明,不同春玉米品种间节折强度达显著水平。对各品种维管束显微指标进行统计分析表明,维管束鞘厚度和表皮细胞厚度变异系数最大,分别达到34.8%和23.2%;茎节维管束数目增多不利于节折强度的提高(r=-0.945**,r=-0.927**),维管束平均面积、韧皮部面积增大有利于节折强度的增加(r=0.831*,r=0.799*;r=0.733*,r=0.786*)。通径分析表明,维管束数目对节折强度的直接效应最大,表皮细胞厚度次之,维管束最大面积、维管束鞘厚度、韧皮部面积等指标也通过维管束数目对茎折强度起间接作用。参试品种中,京农科728、纪元108维管束数目较少,维管束平均面积、韧皮部面积较大,茎折强度较高,抗倒伏性优于其他品种。
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| 关 键 词： | 春玉米 茎秆性状 显微结构 穿刺强度 相关分析 |
| 收稿时间： | 2020/1/19 0:00:00 |
Response of Stem Microstructure of Different Spring Maize Varieties to Bending Strength |
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| JIANG Ao-nan,YAN Jing-qi,LU Hai-bo,ZHAO Hai-chao,HUANG Zhi-hong.Response of Stem Microstructure of Different Spring Maize Varieties to Bending Strength[J].Journal of Maize Sciences,2020,28(5):53-59. |
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| Authors: | JIANG Ao-nan YAN Jing-qi LU Hai-bo ZHAO Hai-chao HUANG Zhi-hong |
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| Institution: | Hebei North University/Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Zhangjiakou 075000, China |
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| Abstract: | In order to compare different section folding strength of spring maize varieties, in cold and arid regions of northwest nine spring maize varieties as the research object, through the determination of maize base in the third section flexural strength, microstructure and by using an optical microscope to observe the internodes, section microscopic indicators of vascular bundle and folding strength related analysis, the research section of spring maize folding strength and stem the relationship between the microstructure. The results showed that the joint folding strength of different spring maize varieties reached a significant level. Statistical analysis on the microscopic indexes of vascular bundles showed that the variation coefficient of vascular bundle sheath thickness and epidermal cell thickness was the largest, reaching 34.8% and 23.2% respectively. The increase of the number of vascular bundles in stem segment was not conducive to the improvement of the nodule folding strength(r=-0.945**, r=-0.927**), while the increase of the mean area of vascular bundles and phloem area was beneficial to the increase of the nodule folding strength(r=0.831*, r=0.799*, r=0.733*, r=0.786*). Diameter analysis showed that the number of vascular bundles had the largest direct effect on the strength of the stem folding, followed by the thickness of epidermal cells, and the largest area of vascular bundles, the thickness of vascular bundle sheath, phloem area and other indicators also had an indirect effect on the strength of stem folding through the number of vascular bundles. Among the tested varieties, the number of vascular bundles was less, the average area of vascular bundles and phloem area was larger, the stalk folding strength was higher, and the lodging resistance was better than other varieties. |
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| Keywords: | Spring maize Puncture Microstructure Rind-penetrometer resistance Correlation |
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