Biological response of different cultivars of millet to low nitrogen stress
不同糜子品种对低氮胁迫的生物学响应
作者: ZHANG Mei-junQIAO Zhi-junYANG Wu-deFENG Mei-chenXIAO Lu-jieWANG GuangDUAN YunCollege of Agronomy,Shanxi Agricultural UniversityInstitute of Germplasm Resources,Shanxi Academy of Agricultural Sciences
刊名: Journal of Plant Nutrition and Fertilizer, 2014(03), pp.661-669
中文刊名: 植物营养与肥料学报, 2014(03), pp.661-669
来源数据库: CJFDTEMP_U
DOI: CNKI:SUN:ZWYF.0.2014-03-018
关键词: milletlow nitrogen stressbiological traitnitrogen efficiency
中文关键词: 糜子低氮胁迫生物学性状氮效率
英文摘要: A solution culture experiment was carried out to study the biological trait,the different responses in N uptake and utilization efficiency of four cultivars of millet under low nitrogen stress,the correlation between N uptake and morphological and physiological traits of root system were also discussed. The results show that under low nitrogen stress,the shoot growth of millet was restrained earlier than roots. The N uptake was decreased,but the general efficiency of N increased drastically. The mildest restrain in plant height,leaf area,shoot and root dry weight,total root length,root number,total and active uptake area was in cultivar Jinshu 7. The total N uptake of Jinshu 7 was 1. 35,1. 50,1. 39 times of those of Jinshu 1,Jinshu 5,Jinshu 8,accordingly,its N efficiency was20. 92%,12....
中文摘要: 采用溶液培养的方法,研究了低氮胁迫下不同糜子品种苗期生物学性状、氮素吸收利用效率差异及与根系形态生理指标之间的相关关系。结果表明,低氮胁迫下,糜子地上部生长受抑程度大于根部,植株氮累积量降低但氮利用效率明显提高。晋黍7号株高、叶面积、茎叶干重、根干重、总根数、总吸收面积和活性吸收面积下降幅度在所测试品种中均最小,其总氮累积量分别是晋黍1号、晋黍5号、晋黍8号的1.35、1.50、1.39倍,根系氮累积量/总氮量的百分率增加的幅度和地上部氮累积量/总氮量的百分率下降的幅度均最低,分别为9.75%和3.47%;植株氮利用效率比晋黍1号、晋黍5号、晋黍8号分别高20.92%、12.44%、14.83%。晋黍7号较其他品种更耐低氮胁迫。低氮胁迫下,糜子根系干重、总根长、总吸收面积与总氮累积量呈显著线性相关,表明低氮胁迫下,根系形态生理指标对氮素吸收效率起重要作用。
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