摘要
以生长于田间的玉米掖单13(耐旱基因型玉米)和丹玉13(不耐旱基因型玉米)为试验材料,应用ICP对供试玉米的初生根和第一、二、三、四、五、六、七、八和第九层次生根的大量元素氮、磷、钾、钙和镁等项指标进行了测定和比较分析。结果表明:除个别根外,耐旱基因型玉米不同类型根中的全氮含量和速效氮含量极显著低于不耐旱基因型玉米根系(P<0.01);根中的钙元素含量和镁元素含量极显著高于不耐旱基因型玉米根系(P<0.01);根系中磷元素含量和根系中的钾元素含量在两基因型玉米根系之间差异不显著(P>0.05)。
The primary root and the first to ninth layer secondary roots of two maize genotypes of Yedan - 13 （drought-tolerant） and Danyu- 13（non drought-tolerant） with different tolerance to drought in the field conditionwere investigated to study their content of nitrogen, phosphorous, kalian, calcium and magnesium by ICP. The results showed that the total nitrogen and available nitrogen of Danyu - 13 were higher than that of Yedan- 13 at the most significant difference level （ P 〈 0.01）. And the calcium and magnesium of Yedan - 13 were higher than that of Danyu - 13 at the most significant difference level （P 〈 0.01 ）. However, there were no significant differences in phosphorous and kalian of root between the two genotypes （ P 〉 0.05）.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第3期148-153,共6页
Agricultural Research in the Arid Areas
基金
国家863计划项目(2006AA10Z227)
国家973计划项目(2009CB118601)
中国科学院东北地理与农业生态研究所青年博士基金项目
关键词
玉米
根系
大量元素
耐旱性
maize
root system
macro-element
tolerance to drought.
