Abstract: To properly utilize aged waste resources is an important issue in ecoenvironmental protection. In this study, 20%, 80%, and 100% of aged wastes from landfill were added to culture medium to investigate their ecotoxicity on the seed germination of Cucumis sativus, with distilled water and soil as the contrasts. The wastes could substantially improve the seed germination of C. sativus, and didn’t show any toxic effect. The optimal proportion of the wastes in the medium was 80%. In this case, the seed germination potential was increased by 12.8% and 7.6%, and the seed germination rate was increased by 11.3% and 7.2%, as compared with those in distilled water and soil substrate, respectively. The aged wastes could also promoted the growth of root and sprout markedly. In the medium with 80% of aged wastes, the root length, sprout length, and sprout fresh weight were increased by 177.6% and 49.0%, 44.9% and 28.4%, and 143.4% and 72.4%, as compared with those in distilled water and soil substrate, respectively. These results suggested that land application of the aged wastes from landfill could be a feasible approach for the recycling of the aged waste resources.

Key words: shallow tillage, straw returning, soil potassium, stratification ratio, winter wheat/summer maize rotation system, Guanzhong Plain.