【摘要】 采用野外施肥试验及室内分析测试方法 ,探讨了复合污泥堆肥施用于高速公路绿化带后对土壤理化性质、植物体内营养状况及周围环境的影响。结果表明 ,施用该肥后1.从土壤理化性质的变化上看 ,土壤的CEC、速效氮、速效磷、有机质和含水量均增加 ,而容重下降 ;2.从植物营养看 ,植物体内的氮、磷含量比对照要高 ,且随堆肥用量增大而增高 ;3.硝态氮淋溶仅达40～60cm ,未影响地下水。因供试土壤为石灰性土壤 ,重金属的生物有效性很低 ,植物体内的重金属与对照无差异 ,说明未在植物体内积累。而且高速公路绿化带是一个封闭体系 ,同时又避开了食物链 ,因而其应用是安全的。更多还原

【Abstract】 Effects of physical, chemical properties of soil, plant nutrition and environment of highway greenbelts were tested by both application of complex sludge compost and detection in lab. It was found that plant growth response was better after complex sludge compost (CSC) applied in highway greenbelt. First, in respect of the change in soil chemical and physical properties, all indexes of CEC, available nitrogen, phosphorus, water content and organic matter was increased, but density of soil decreased. Second, in respect of plant nutrient, the contents of nitrogen, phosphorus in plant tissue was higher than that of control and increased with the applied amount of CSC increased. Third, nitrate-nitrogen did not pollute underground water, as its leaching only reached at depth of 40-80cm.Finally, heavy metals bioavailability in calcareous soil of highway was very low, and there was no difference of heavy metals in plant between CSC and control. It showed that there was no accumulation of heavy metals in plant. Considering that highway greenbelt is a close system and not related with food chain, it indicated that the application of CSC in highway greenbelt is safe.更多还原