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首页> 美国卫生研究院文献>The Scientific World Journal >Allelopathic Effects of Litter Axonopus compressus against Two Weedy Species and Its Persistence in Soil
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Allelopathic Effects of Litter Axonopus compressus against Two Weedy Species and Its Persistence in Soil

机译：凋落物轴突对两种杂草的化感作用及其在土壤中的持久性

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摘要

This study investigated the allelopathic effect of Axonopus compressus litter on Asystasia gangetica and Pennisetum polystachion. In experiment 1 the bioassays with 0, 10, 30, and 50 g L−1 of aqueous A. compressus litter leachate were conducted. Experiment 2 was carried out by incorporating 0, 10, 20, 30, 40, and 50 g L−1 of A. compressus litter leachate into soil. In experiment 3, the fate of A. compressus litter leachate phenolics in the soil was investigated. A. compressus leachates did not affect the germination percentage of A. gangetica and P. polystachion, but delayed germination of A. gangetica seeds and decreased seed germination time of P. polystachion. A. compressus litter leachates affected weeds hypocotyl length. Hypocotyl length reductions of 18 and 31% were observed at the highest concentration (50 g L−1) compared to the control in A. gangetica and P. polystachion, respectively. When concentration of A. compressus litter leachate-amended soil increased A. gangetica and P. polystachion seedling shoot length, root length, seedling weight and chlorophyll concentration were not affected. The 5-week decomposition study of A. compressus showed that the phenolic compounds in A. compressus litter abruptly decreased about 52% after two weeks and remained steady until the end of the incubation.
机译：这项研究调查了轴突草凋落物对恒河豚草和狼尾草的化感作用。在实验1中，进行了0、10、30和50μgL L sup-1压缩含水曲霉凋落物浸出液的生物测定。实验2是通过将0、10、20、30、40和50μgL L s。pressus凋落物垃圾渗滤液掺入土壤中进行的。在实验3中，研究了土壤压缩垃圾曲霉垃圾渗滤液中酚的去向。 compress草浸出液不影响恒果和多枝P的发芽率，但会延迟恒果种子的发芽和缩短多枝种子的发芽时间。草垃圾渗滤液影响杂草下胚轴长度。在最高浓度（50 g L -1 ）下，与恒果假单胞菌和P. polystachion的对照相比，下胚轴长度分别减少了18％和31％。当草垃圾渗滤液改良土壤的浓度增加时，A。gangetica和 P。多茎苗长，根长，苗重和叶绿素浓度均不受影响。 A的5周分解研究。压缩表明 A中的酚类化合物。两周后腹泻突然减少约52％，并保持稳定直至孵化结束。

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