The allelopathic and grass inhibiting effect of falling flowers of 10 common greening trees in northern cities

doi:10.14088/j.cnki.issn0439-8114.2024.11.010

Abstract

Abstract: In order to realize the recycling and reuse of fallen flowers and screen out efficient and environmentally friendly plant source herbicides with weeding potential, falling flowers of 10 common urban greening trees in northern cities were selected as donors, and the allelopathic effects of their water extract on eight weeds, including Lolium perenne, Malva sinensis, Gypsophila paniculata, Agrostemma githago, Trifolium pratense, Medicago sativa, Centaurea cyanus and Pennisetum alopecuroides were studied through indoor sowing pot experiments. The results showed that the extract of the falling flowers of the Acer buergerianum had a comprehensive inhibitory effect on Lolium perenne, Gypsophila paniculata, Agrostemma githago, Trifolium pratense, Centaurea cyanus and Pennisetum alopecuroides, and the comprehensive principal component values （F） were -2.041, -1.976, -1.716, -0.995, -1.750, -1.290, respectively. The extract of the falling flowers of Koelreuteria paniculata had a comprehensive inhibitory effect on Lolium perenne, Malva sinensis, Medicago sativa, Centaurea cyanus and Pennisetum alopecuroides, and F were -0.458, -0.771, -3.244, -0.434, -0.818, respectively. The extract of the falling flowers of Prunus serrulata had a comprehensive inhibitory effect on Malva sinensis, Gypsophila paniculata, Agrostemma githago, Trifolium pratense and Centaurea cyanus, and F were -0.531, -1.038, -1.601, -0.833, -0.896, respectively. The extract of the above three kinds of falling flowers could inhibit the seed germination and seedling growth of more than five kinds of weeds and had no adverse effect on the soil enzyme activity in the weed rhizosphere, with a weeding potential, which could be used as a preferred species resource for the development of plant-derived herbicides.

Key words: greening trees, falling flowers, water extract, allelopathic weed control effects, soil enzyme activity, northern cities

CLC Number:

S731.2

MA Yong, LIN Yuan-yuan, LIU Zeng-wen, MA Qian. The allelopathic and grass inhibiting effect of falling flowers of 10 common greening trees in northern cities[J]. HUBEI AGRICULTURAL SCIENCES, 2024, 63(11): 57-62.

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