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Impacts of plant growth regulators of bermudagrass growth and development.

机译:百慕大草生长发育的植物生长调节剂的影响。

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摘要

Current use patterns for synthetic plant growth regulators (PGRs) in bermudagrass (Cynodon sp.) have illustrated these compounds may have diverse functions in turfgrass beyond the scope of what is recommended. Studies were conducted in bermudagrass to investigate the effect of PGRs on the following: (1) transition into fall dormancy and interactions with variable growth temperatures, (2) nitrogen and water use efficiency, (3) lateral development and vegetative establishment, and (4) thatch accumulation. All studies featured trinexapac-ethyl, a gibberellic acid biosynthesis inhibitor while some studies also featured similar compounds such as ethephon or paclobutrazol. Results suggested the following for each study: (1) bermudagrass responses to trinexapac-ethyl at suboptimum temperatures help explain fall field observations through indications of enhanced ecological fitness, (2) trinexapac-ethyl reduces clipping nitrogen but does not promote reduced water use or increased nitrate loss, (3) PGRs stimulate lateral development through alteration of canopy architecture or stolon growth and may thereby assist bermudagrass sprig establishment, particularly at locations with limited irrigation, and (4) trinexapac-ethyl changes canopy architecture, not thatch, to improve mowing quality. While some new prospective field benefits for PGRs were suggested, the scope of this research principally indicated that normal use patterns of trinexapac-ethyl are devoid of unwanted side effects, either directly or indirectly through manipulation of bermudagrass ecology.
机译:百慕大草( Cynodon sp。)中合成植物生长调节剂(PGR)的当前使用模式表明,这些化合物可能在草皮草中具有多种功能,超出了建议的范围。在百慕大草中进行了研究,以研究PGR对以下物质的影响:(1)转变为秋季休眠以及与生长温度变化的相互作用;(2)氮和水的利用效率;(3)侧向发育和营养生长;以及(4 )堆积所有研究均以曲百克-乙基(一种赤霉素生物合成抑制剂)为特征,而一些研究还采用了类似的化合物,例如乙烯利或多效唑。每个研究的结果表明以下几点:(1)百草达对次生磷酸酯的反应在最适温度下有助于通过增强生态适应性的迹象来解释秋季实地观察结果;(2)特瑞沙酮-乙基酯减少了固氮,但不会促进减少用水或增加水分利用硝酸盐损失,(3)PGR通过改变冠层结构或or茎生长来刺激侧向发育,从而可能有助于百慕大草小枝的建立,特别是在灌溉有限的地方,以及(4)改变丁香草酸乙酯的冠层结构,而不是茅草,以改善割草质量。尽管提出了一些新的前瞻性的植物遗传资源益处,但这项研究的范围主要表明,抗倒酯的正常使用方式无任何不良副作用,无论是通过百慕大草生态学的直接或间接操作。

著录项

  • 作者

    Fagerness, Matthew James.;

  • 作者单位

    North Carolina State University.;

  • 授予单位 North Carolina State University.;
  • 学科 Agriculture Agronomy.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 82 p.
  • 总页数 82
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农学(农艺学);
  • 关键词

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