城市污泥堆肥用作蔬菜育苗基质的孔隙适宜性研究

Study on Porosity Suitability of Municipal Sludge Compost Used as Vegetable Seedling Substrate

研究了城市污泥堆肥的孔隙状况对番茄和甜椒基质育苗的适宜性。结果表明，当污泥堆肥基质的总孔隙度为49％～82％、持水孔隙度为47％～65％时，蔬菜幼苗均能正常生长，只需通过淋洗去除其过量的盐分即可用作蔬菜育苗基质；与添加土壤的堆肥基质相比，未添加土壤的基质育苗效果更佳；污泥研磨与否对育苗效果无明显影响。

The porosity suitability of sewage sludge compost used as the seedling substrate of tomato and sweet pepper was studied. The results show that when the total porosity of sewage sludge compost is 49% to 82% , and the water-holding porosity is 47% to 65% , the vegetable seedlings can normally grow well, and it can be used as the vegetable seedling substrate only through the leaching to remove its excessive salt. Compared to the compost substrate with soil added, the seeding effect of the compost substrate without soil added is better. Grinding sludge has no significant effect on the breeding effect.