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首页> 外文期刊>Annals of Agricultural Science >Allelopathic effect of purple nutsedge (Cyperus rotundus L.) weed on some weed species.
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Allelopathic effect of purple nutsedge (Cyperus rotundus L.) weed on some weed species.

机译：紫色nuts（Cyperus rotundus L.）杂草对某些杂草种类的化感作用。

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C. rotundus leaves and tubers was tested for allelopathic potential against the weeds wild beet (Beta vulgaris), canary grass (Phalaris minor) and barnyard grass (Echinochloa crus-galli). In the laboratory, the crude extracts of leaves and tubers at 10, 20, 40 and 80% were applied on weed seeds and seed germination was observed. In the glasshouse (during 2003-04), Ground tubers and leaves of C. rotundus were mixed with soil at 1.5, 3, 6 and 12 g per 500 g soil (w/w) per pot. Weed seeds were sown in the pots and seedling emergence was observed. C. rotundus did not significantly affect wild beet germination percentage, but negatively affected those of canary grass and barnyard grass particularly at 40 and 80% extract concentration. The extracts also inhibited seedling length and fresh weight of canary grass and barnyard grass particularly at 40 and 80% concentration. In the glasshouse, barnyard grass was the most susceptible to allelopathy by C. rotundus residues, followed by canary grass and wild beet. Seedling emergence inhibition and reduction in weed dry matter were higher with tuber than leaf residues. Foliage residues reduced the dry weight of wild beet by 91 and 70% of the control at 6 and 12 g, respectively. The crop residues showed lower reduction in the dry weight of wild beet than the other 2 weed species. C. rotundus tuber and foliage contained different flavonoids and phenolic compounds such as rutin, kaempferol, quercetin, myricetin, p-hydroxybenzoic, chlorogenic acid and ferulic acids..
机译：测试了C. rotundus叶片和块茎对杂草野甜菜（Beta vulgaris），金丝雀草（Phalaris次要）和bar草（Echinochloa crus-galli）的化感潜力。在实验室中，将10％，20％，40％和80％的叶子和块茎粗提物施用于杂草种子上，并观察到种子发芽。在温室（2003-04年间）中，将圆茎C的地面块茎和叶子与土壤混合，每盆每500克土壤（w / w）的1.5、3、6和12克。将杂草种子播种在盆中，观察到出苗。圆角梭菌并未显着影响野生甜菜的发芽率，但对金丝雀草和bar草的发芽率产生了负面影响，尤其是在提取物浓度为40％和80％时。提取物还抑制了金丝雀草和n草的幼苗长度和鲜重，特别是在40％和80％的浓度下。在温室中，by草最容易受到圆形假丝酵母残留的化感作用，其次是金丝雀草和野生甜菜。块茎对幼苗出苗的抑制作用和杂草干物质的减少均高于叶片残留。叶面残留物分别在6 g和12 g时使野生甜菜的干重分别比对照减少91％和70％。与其他2种杂草相比，农作物残渣的野生甜菜干重降低幅度较小。圆形念菜块茎和叶子含有不同的类黄酮和酚类化合物，如芦丁，山奈酚，槲皮素，杨梅素，对羟基苯甲酸，绿原酸和阿魏酸。

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