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首页> 外文学位 >UPTAKE OF NITROGEN BY COTTON (GOSSYPIUM HIRSUTUM L.) UNDER SALT STRESS.
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UPTAKE OF NITROGEN BY COTTON (GOSSYPIUM HIRSUTUM L.) UNDER SALT STRESS.

机译：盐胁迫下棉花对棉花的吸收。

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摘要

Nitrogen (ammonium-('15)N) absorption studies were made on cotton (Gossypium hirsutum L. var. Deltapine 61) grown in complete Hoagland nutrient solution in pots with various concentrations of NaCl (0, 4, 8, and 12 bars osmotic pressure). Two different stages of growth, vegetative and reproductive, were investigated. Plants were grown in a controlled environment growth chamber.;The absorption rate of water substantially decreased by increasing salinity levels. This reduction was proportional to plant growth and total dry matter production. Water uptake rate and plant growth and development were affected to a greater extent than ('15)N absorption rate.;The effect of salinity was more pronounced for a longer uptake time and the vegetative stage than for a shorter uptake time and the reproductive stage of growth.;Low and medium levels of salinity (4 and 8 bars osmotic pressure of the nutrient solution) did not exhibit a significant effect on ('15)N absorption rate by cotton plants. The high level of salinity (12 bars osmotic pressure of the culture solution) resulted in substantial reduction in ('15)N absorption rate. The concentration of ('15)N in plant shoots was higher under salinity stress than it was in the control.
机译：对在完全Hoagland营养液中生长的棉花（Gossypium hirsutum L. var。Deltapine 61）上的氮（铵-（'15）N）吸收进行了不同浓度NaCl（0、4、8和12 bar渗透压）的盆中种植压力）。研究了营养生长和生殖生长的两个不同阶段。植物在受控的环境生长室中生长。随着盐度水平的提高，水的吸收率大大降低。这种减少与植物生长和干物质总产量成正比。水分吸收速率和植物生长发育受到的影响远大于（'15）N吸收速率。;更长的吸收时间和营养阶段比较短的吸收时间和生殖阶段对盐分的影响更为明显盐度的中低水平（营养液的渗透压为4和8巴）对棉花植株对（'15）N的吸收速率没有显着影响。高盐度（培养液的12 bar渗透压）导致（'15）N吸收速率大大降低。在盐胁迫下，植物芽中（'15）N的浓度高于对照。

著录项

  • 作者

    PESSARAKLI, MOHAMMAD.;

  • 作者单位

    The University of Arizona.;

  • 授予单位 The University of Arizona.;
  • 学科 Engineering Agricultural.
  • 学位 Ph.D.
  • 年度 1981
  • 页码 93 p.
  • 总页数 93
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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