论文部分内容阅读
利用盆栽试验研究了土著植物黄荆条茎、叶水提液对飞机草生长和光合特性的化感效应,以明确土著植物替代防治飞机草的作用机理。结果表明:飞机草株高、相对叶绿素含量在黄荆条茎、叶提取液处理下均降低,且降低程度与浓度呈正相关;黄荆条茎(低浓度除外)和叶各浓度提取液对飞机草叶片数、总叶面积、分枝数、生物量和相对生长速率均有抑制作用;相同浓度下,叶提取液的抑制作用大于茎提取液。与对照相比,黄荆条茎、叶提取液各浓度处理下飞机草的最大净光合速率、光饱和点、表观量子效率均降低,光补偿点增加。光响应曲线随着茎、叶提取液浓度的增加而降低。可见,黄荆条水提取液对飞机草的形态、生长和光合作用均有抑制效应,可以考虑将其作为替代防治飞机草的目标物种。
Pot experiments were conducted to study the allelopathic effects of extracts of stem and leaf of stem and leaves from native plants of Vitex negundo on the growth and photosynthetic characteristics of the plane grass to clarify the mechanism of substitution of native plants for the prevention and control of the disease. The results showed that the plant height and relative chlorophyll contents of P. crispus decreased under the treatment of stem and leaf extract of Vitex negundo, and the degree of decrease was positively correlated with the concentration. Number, total leaf area, branch number, biomass and relative growth rate all inhibited. Under the same concentration, the inhibitory effect of leaf extract was greater than that of stem extract. Compared with the control, the maximum net photosynthetic rate, light saturation point and apparent quantum yield of A. crispate decreased with the concentration of stem and leaf extract, and the light compensation point increased. Light response curve with the stem and leaf extract concentration decreased. Visible, Vitex negundo extract on aircraft grass morphology, growth and photosynthesis have inhibitory effect, it can be considered as an alternative to control the aircraft grass the target species.