大豆品种对间作玉米苗期根系生长及抗氧化特性的影响

doi:10.16036/j.issn.1000-2650.2021.01.003

摘要/Abstract

摘要： 【目的】为探究不同大豆品种与种植模式对苗期玉米根系的影响,揭示玉米大豆间套作对玉米根系发育的影响。【方法】以46种大豆材料与玉米进行间作,对苗期玉米的根系形态、活力及SOD抗氧化酶活性进行聚类分析。在阈值为8.5时,将供试大豆材料划分为3个类群。不同大豆品种对间作玉米苗期的影响不同,类群Ⅰ强于类群Ⅱ、Ⅲ,结合四川省主推品种类型,从类群Ⅰ中选择3个大豆品种与玉米进行间作,进一步分析不同种植模式下玉米生长及其根系形态、生理指标的变化。【结果】同单作玉米相比,与“南豆25”“桂夏1号”和“贡秋豆4号”间作条件下,间作玉米地上部分生物量、根系生物量显著提高,地上部分生物量分别比单作玉米高56.4%、80.5%和32.6%,根系生物量分别比单作玉米高38.2%、57.4%和24.7%;间作玉米苗期根系长度、根系表面积显著提高;间作玉米苗期根系活力、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性、过氧化物酶(POD)活性显著提高,根系活力分别比单作玉米高27.7%、25.0%和39.7%;SOD活性分别高97.4%、71.2%和120.9%;CAT活性分别高47.4%、67.5%和44.7%;POD活性分别高28.5%、11.8%和16.2%;膜脂过氧化产物丙二醛(MDA)含量显著低于单作。【结论】种植模式对玉米根系生长影响显著,玉米-大豆间作种植可以促进玉米苗期根系生长,延缓玉米根系衰老;“南豆25”对间作玉米苗期根系影响小于“桂夏1号”“贡秋豆4号”。

关键词: 玉米, 根系生长, 间作, 抗氧化酶, 大豆品种

Abstract: 【Objective】 In order to explore the effects of different soybean varieties and planting patterns on maize root system at seedling stage,the effects of maize soybean intercropping on maize root development were revealed.【Method】 46 soybean materials were intercropped with maize.The root morphology,activity and SOD antioxidant enzyme activity of maize at seedling stage were analyzed by cluster analysis.At the threshold of 8.5,the soybean materials were divided into three groups.Different soybean varieties have different effects on the seedling stage of intercropping maize.Group I is stronger than group Ⅱ and Ⅲ.Combining with the main types of varieties promoted in Sichuan province,three soybean varieties were selected from group I and intercropped with maize,and the changes of maize growth,root mor-phology and physiological indexes under different planting modes were further analyzed.【Result】 Compared with the monocropped maize,the aboveground biomass and root biomass of the intercropped system for ‘Nandou25’‘Guixia 1’and‘Gongqiudou 4’ were significantly increased by 56.4%,80.5% and 32.6%.Root biomass of the intercropped for three varieties were significantly increased by 38.2%,57.4% and 24.7%,respectively.Compared with the monocropped maize,the root length of the intercropped system for three varieties at seedling stage was significantly increased by 27.7%,25.0% and 39.7%.The activities of root system,super oxide dismutase (SOD),catalase (CAT) and peroxidase (POD) in intercropping system for three varieties were significantly increased by 27.7%,25.0% and 39.7%,97.4%,71.2% and 120.9%,47.4%,67.5% and 44.7%,28.7%,11.8% and 16.2%,respectively.The content of malondialdehyde (MDA) in intercropping system for three varieties was significantly decreased than the monocropped maize.【Conclusion】 The effect of planting mode on the root growth of maize is significant.The intercropping of maize and soybean can promote the root growth of maize at seedling stage and delay the senescence of maize root; the effect of ‘Nandou 25’ on the root of maize at seedling stage is less than‘Guixia 1’and‘Gongqiudou 4’.

Key words: maize, root growth, intercropping, antioxidant enzymes, soybean varieties

中图分类号:

S513

杨雪丽, 吴吉英子, 刘凡, 刘旭东, 任俊波, 杜青, 陈平, 雍太文. 大豆品种对间作玉米苗期根系生长及抗氧化特性的影响[J]. 四川农业大学学报, 2021, 39(1): 11-18.

YANG Xueli, WU Jiyingzi, LIU Fan, LIU Xudong, REN Junbo, DU Qing, CHEN Ping, YONG Taiwen. Effects of Different Soybean Varieties on Root Growth and Physiological Characteristics of Intercropping Maize[J]. Journal of Sichuan Agricultural University, 2021, 39(1): 11-18.

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