Research on the Planting Effect of Dactylis glomerata+Lolium perenne+Trifolium repens Grasslands in Summer/Autumn Sowing Dates

PurposeTo study the suitable sowing date of Dactylis glomerata+Lolium perenne+Trifolium repens grasslands, which will provide some basis for the management and sowing of this kind of grasslands.

MethodWe analyzed the characteristics of plant population, community and nutrients of soil and herbage of D. glomerata+L. perenne+T. repens grasslands under summer/autumn sowing dates.

ResultThe dominance of D. glomerata was higher in autumn sowing grasslands, while native plants was higher in summer sowing grasslands. For D. glomerata in autumn and summer sowing grasslands, the small plant number was abundant and the large plant number was lower, and their population age structure showed an increasing pattern. The plant density of D. glomerata, stolon density, stolon weight and individual stolon weight of T. repens and the aboveground biomass proportion of sowing herbage were higher in autumn sowing grasslands than in summer sowing grasslands, while the biomass proportion of native forbs, plant species diversity and species distribution indices in summer sowing grasslands were higher than in autumn sowing grasslands. The contents of soil organic matter and herbage total nitrogen were higher in the autumn sowing grasslands than in summer sowing grasslands.

ConclusionThe planting effect of D. glomerata+L. perenne+T. repens grasslands in autumn sowing was better, which was beneficial for discouraging native plant species growth, herbage growth and enhancing herbage nutritional value and improving soil fertilization, and suitable for promotion in the research area and relevant regions in the south China.