本试验讨论了鸭跖草防除的时期和方法。
The test had studied the proper time and method of controlling dayflower.
缺铁处理下鸭跖草会产生根际酸化效应。
Fe deficiency could lead to acidification of the rhizosphere of c.
鸭跖草花梗顶部的维管束分布在中央的基本组织内。
Vascular bundles of the pedicel in flower of Commelina communis were scattered within central fundamental tissues.
文中对鸭跖草及其有关类群的花部维管束系统的来源及演变进行了比较、讨论。
The origin and evolution of the vascular system of the flower in Commelina communis and the taxa concerned were discussed in this paper.
鸭跖草的木质部为六原型，韧皮部与木质部相同排列，根皮层中分布有粘液细胞和晶体细胞。
The phloems rage alternate with xylems. There are mucus cells and crystal cells in cortex of root. And vascular bundles scatter in stem.
通过提供不同外界环境条件的方法，研究了土壤含水量、播种深度及除草剂虎威对鸭跖草出苗的影响。
The effects of different soil water content, depth of sowing and dose of fomesafen on dayflower emergence were studied.
结果表明，随着叶龄的增大，施药后鸭跖草叶中丙二醛（MDA）含量变化量下降，而叶绿素含量、光合速率及气孔导度恢复越快。
The content of leaf MDA decreased, but chlorophyll content, photosynthesis rate and stomatal conductance recovered rapidly with leaf stages after imazethapyr spray.
结果表明，随着叶龄的增大，施药后鸭跖草叶中丙二醛（MDA）含量变化量下降，而叶绿素含量、光合速率及气孔导度恢复越快。
The content of leaf MDA decreased, but chlorophyll content, photosynthesis rate and stomatal conductance recovered rapidly with leaf stages after imazethapyr spray.
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