污泥——草地肥料的初步研究

本文报导了经过堆肥处理的污泥有机肥培育结缕草 ( Zoysia-Japonica)的初步试验。结果表明 ,以 Cd为施污泥量的限制因子 ,在施污泥有机肥 4 5 t· hm- 2 (干重 )以下时 ,酸性与微酸性土壤 ( p H<6.5 ) ,土壤中 Cd含量 ,低于 Cd的土壤环境质量标准 ( 0 .3mg· kg- 1 ,地下水 NO3-N含量 ,低于地面水 、 类标准 ( NO3-N1 0 mg· L- 1 )。土壤中有机质、速效N、总 N、总 P分别比对照增加 1 6%、78%、61 %和 1 4 0 % ,结缕草地上部分生物量是对照区的 1倍。因此 ,园林绿化是污泥处置利用的良好途径

The Preliminary Study on Sludge as Fertilizer Used for Grassland

The preliminary experiments on sludge by compost as the fertilizer used for grassland(Zoysia Japonica)were made.The results showed that Cd content in soil was lower than 0.3mg·kg -1 which is the value of soil environmental quality standard in china under the conditions of the fertilizer applications lower than 45t·ha -2 (dry weight)and the pH value of soil<6.5(Cd as the limiting factor for the amounts of fertilizer application).NO 3-N content of groundwater was lower than the value of the first grade national standard of groundwater(NO 3-N10mg·L -1 ,P0.1mg·L -1 ).The content of organic matter,activated form N,total N,total P were higher than control by 16%,78%,61%,and 140%respectively.The biomass of Zoysia Japonica had been increased two times as against the control.Therefore,the sludge as the fertilizer used for grassland is a very good application way.