不同抗倒类型小麦植株节间性状与抗倒能力的氮肥调控效应
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国家重点研发计划项目(2016YFD0300408–4);安徽省自然科学基金项目(1408085QC54)


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    摘要:

    以抗倒伏小麦品种(生选6号、扬麦18、华成3366)、易倒伏小麦品种(扬麦13、扬麦22、扬麦24)为材料,设置施纯氮180 kg/hm2(N180)、240 kg/hm2(N240)2个氮素水平,研究不同小麦品种植株基部节间性状与抗倒伏能力对氮肥调控效应的差异。结果表明:与 N180相比,随着施氮量增加,易倒伏型小麦品种抗倒伏指数平均降低35.98%,抗倒伏型小麦品种抗倒伏指数平均降低1.12%,易倒伏型小麦的抗倒能力在不同施氮水平间的差异大于抗倒伏型小麦的;易倒伏小麦N240处理植株基部节间直径、半纤维素含量、纤维素含量、K素含量与薄壁组织厚度低于N180处理的,5个参数的降幅分别为12.60%、16.36%、19.04%、34.59%、27.48%;抗倒伏小麦N240处理植株基部节间直径、半纤维素含量、纤维素含量、K素含量和薄壁组织厚度较N180处理降低,降幅分别为5.13%、7.97%、3.74%、26.73%、15.70%;易倒伏小麦N240处理植株基部节间抗折力、针刺力、木质素含量与大维管束面积低于N180处理的,而抗倒伏小麦以上4个参数在2个施氮水平间无显著差异;与N180处理相比较,易倒伏小麦品种N240处理植株基部节间小维管束数降低,抗倒伏小麦品种的升高;与抗倒伏品种相比,易倒伏品种植株基部节间抗倒伏能力对施氮水平响应敏感。综合以上分析可知,增施氮肥主要是影响了易倒伏小麦植株的基部节间抗折力、针刺力、木质素含量、大维管束面积及小维管束数,从而使易倒伏小麦抗倒性降低。

    Abstract:

    To explore the regulation effect of internode traits and lodging resistance on nitrogen fertilizer of different types of wheat plants, two types of wheat varieties, the lodging resistance type and the lodging prone type, were used as materials to study the differences of basal internode traits and lodging resistance on the regulatory changes of nitrogen fertilizer with two treatments, pure nitrogen 180 kg/hm2(N180) and 240 kg/hm2(N240). The results showed that the lodging resistance index of lodging prone wheat varieties average decreased by 35.98%, and that of lodging resistance wheat varieties average decreased by 1.12%, for the two nitrogen treatment, 180 kg/hm2 and 240 kg/hm2 respectively. The difference of lodging resistance of lodging prone wheat was greater than that of lodging resistant wheat at different nitrogen levels. The internode diameter, hemicellulose content, cellulose content, K element content and parenchyma thickness of the plant treated with lodging prone wheat N240 were significantly lower than those treated with N180, the decline of the 5 parameters were 12.60%, 16.36%, 19.04%, 34.59%, 27.48%; Compared with the N180 treatment, the basal internode diameter, hemicellulose content, cellulose content, K element content and parenchyma thickness of the lodging resistance wheat N240 decreased by 5.13%, 7.97%, 3.74%, 26.73% and 15.70%, respectively. The internode flexural strength, acupuncture power, lignin content and large vascular bundle area of the plant treated with easy lodging wheat N240 were significantly lower than those of N180 treatment, while the above 4 parameters of lodging resistant wheat showed no significant difference between the two nitrogen application levels. Compared with N180 treatment, the number of small vascular bundles at the basal of the plants was significantly reduced, and the number of lodging resistance wheat varieties was significantly increased under N240 treatment. Compared with N180 treatment, the number of small vascular bundles at the basal internode of the lodging prone wheat variety N240 treatment plant decreased significantly, and the lodging resistance type wheat variety significantly increased. Compared with lodging resistant cultivars, lodging prone cultivars were sensitive to N application. It could conclude that increasing nitrogen fertilizer application changed the influence of lodging prone wheat plant basal internode resistance, needling force, lignin content, area of large vascular bundle and number of small vascular bundles, thus reduced lodging resistance of the lodging prone type wheat.

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魏鹏,邵庆勤,闫素辉.不同抗倒类型小麦植株节间性状与抗倒能力的氮肥调控效应[J].湖南农业大学学报:自然科学版,2021,47(6):.

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  • 在线发布日期: 2021-12-28
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