摘要
[目的]研究阿特拉津对皇竹草生长的影响。[方法]通过盆栽试验,研究了5个阿特拉津浓度(20、50、100、200、500mg/kg)下皇竹草(Pennisetum hydridum)株高、生物量、根冠比和叶绿素含量的变化。[结果]结果表明,低浓度的阿特拉津(20、50mg/kg)对皇竹草株高、生物量均无显著影响;中等浓度的阿特拉津(100、200mg/kg)显著降低了皇竹草的生物量,分别降低了34.1%和36.4%,而对株高无显著影响;高浓度的阿特拉津(500mg/kg)对皇竹草生物量和株高均有显著降低的效应,最大降幅分别为40.6%和20.0%;各浓度的阿特拉津对皇竹草根冠比和叶绿素含量影响不显著。[结论]皇竹草对阿特拉津胁迫具有较强的耐受力。
[Objective] This study was to investigate the effect of atrazine stress on the growth of Pennisetum hydridum. [Method] Pot experiments were conducted to study the effects of atrazine stress (20, 50, 100, 200, 500 mg/kg) on plant height, biomass, root-shoot ratio and chlorophyll content of P. hydridum. [Results] Low level of atrazine stress (20 and 50 mg/kg) showed no significant effects on plant height and biomass of P. hydridum. Moderate level of atrazine stress (100 and 200 mg/kg) did not show significant effect on plant height, but did on the biomass of P. hydridum. Biomass of P. hydridum stressed by 100 and 200 mg/kg of atrazine was decreased by 34.1% and 36.4% compared with control, respectively. High level of atrazine stress (500 mg/kg) brought significant decrease in plant height(by 40.6%) and biomass(20.0%) of P. hydridum. All levels of atrazine stress showed no significant effects on root-shoot ratio and chlorophyll content of P. hydridum. [Conclusion] Pennisetum hydridum has strong tolerance to atrazine stress.
基金
Supported by Natural Science Foundation of Yunnan Province(2010CD058)~~
关键词
皇竹草
阿特拉津
株高
生物量
根冠比
叶绿素含量
胁迫耐受力
Pennisetum hydridum
Atrazine
Plant height
Biomass
Root-shoot ratio
Chlorophyll content
Stress tolerance